[Announce] Django Graphos - Django charting made *really* easy

[Shabda Raaj]

Hello,

I would like to announce Django Graphos - An app which makes it really easy 
to work with Django graphs.

https://github.com/agiliq/django-graphos

Graphos is a Django app to plot data into  graph.

### Supported Backends:

* Python Nested lists
* CSV Files
* MongoDB
* Django ORM

### Charting API Supported


* Google charts API
* Flot
* YUI

https://github.com/agiliq/django-graphos

Plotting a chart from a model is as simple as:

queryset = Accounts.objects.filter(foo=bar)
LineChart(ModelDataSource(queryset, fields=["year", "sales", "expenses"]))

Looking for review of the code and architecture. 
Pull reviews very welcome: https://github.com/agiliq/django-graphos


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Using .extra after using .annotate is not working

[Shabda Raaj]

I am trying to get a field in a queryset which depends on the result
of the annotations. I tried using extra on an annotated queryset,
which doesn't seem to work.

Lets say my models looks like this:

class Foo(models.Model):
name = models.CharField(...)

class FooData(models.Model):
foo = models.ForeignKey(Foo)
sales = models.PositiveIntegerField()
items_sold = models.PositiveIntegerField()

I have a queryset of Foo objects

some_foos = Foo.objects.filter()

I have annotated it to get the sum on FooData.

some_foos.object.annotate(
total_sales=Sum("foodata__sales"),
total_items_sold=Sum("foodata__items_sold")
)

Now I want to get the average price for which I am trying to
use .extra. They don't seem to work. (I have looked the generated sql
queries).

#Wont work, fields not defined yet.
some_foos.object.annotate(
total_sales=Sum("foodata__sales"),
total_items_sold=Sum("foodata__items_sold")
).extra(select={'price_avg': "total_sales/total_items_sold"})

#Wont work, this adds an extra clause in group by
price_avg = "SUM(appname_foodata.sales)/
SUM(appname_foodata.items_sold)"
some_foos.object.annotate(
total_sales=Sum("foodata__sales"),
total_items_sold=Sum("foodata__items_sold")
)



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Re: Editing the RSS in the Django community feeds

[Shabda Raaj]

Hi Guys,

Updating feedburner actually pulled in a lot of old entries in the
community feed. I am not sure why.

My apologies for pushing this to the feed. Hopefully the feed will
pick up only the new entries from now on.

On Mar 12, 7:44 pm, Shabda Raaj <sha...@agiliq.com> wrote:
> Hi Russel,
>
> Thanks for your help.
>
> Looks like I was using this via feedburner, so I just updated it at the
> feedburner level.
>
>
>
>
>
>
>
> On Tuesday, March 12, 2013 7:57:46 AM UTC+5:30, Russell Keith-Magee wrote:
>
> > Hi Shabda,
>
> > I've got hold of the server logs - the feeds are tied into a bigger
> > framework for actually gathering the blog entries, and older feeds are
> > resisting change :-)
>
> > There are two options here:
>
> >  * You should be able edit the feed yourself: visit
> >http://www.djangoproject.com/community/mineand update the details.
>
> >  * Try deleting the feed and re-adding it.
>
> > If you're still having problems, try emailing 
> > ja...@jacobian.org- he's got the keys to the servers, and 
> > should be able to fix things at a
> > low level.
>
> > Yours,
> > Russ Magee %-)
>
> > On Tue, Mar 12, 2013 at 8:21 AM, Russell Keith-Magee <
> > rus...@keith-magee.com > wrote:
>
> >> Hi Shabda,
>
> >> I took a look at this for you, but for some reason the new URL is
> >> throwing an error (on our end) when I try and update it. I'll keep digging
> >> and let you know when it's working.
>
> >> Yours,
> >> Russ Magee %-)
>
> >> On Mon, Mar 11, 2013 at 8:34 PM, Shabda Raaj 
> >> <sha...@agiliq.com
> >> > wrote:
>
> >>> Hello,
>
> >>> The Django community RSS feeds has a form to add new RSS:
> >>>https://www.djangoproject.com/community/add/blogs/
>
> >>> We have our RSS added in this from way back. However sometime we write
> >>> about non-django stuff, which is not relevant in this feed. I would like 
> >>> to
> >>> update this to our Django only feed:
>
> >>>http://agiliq.com/blog/rss/latest/django/
>
> >>> Can someone with access do this? (or advise me who can I contact to edit
> >>> this.)
>
> >>> --
> >>> You received this message because you are subscribed to the Google
> >>> Groups "Django users" group.
> >>> To unsubscribe from this group and stop receiving emails from it, send
> >>> an email to django-users...@googlegroups.com .
> >>> To post to this group, send email to 
> >>> django...@googlegroups.com
> >>> .
> >>> Visit this group athttp://groups.google.com/group/django-users?hl=en.
> >>> For more options, visithttps://groups.google.com/groups/opt_out.

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Re: Editing the RSS in the Django community feeds

[Shabda Raaj]

Hi Russel,

Thanks for your help. 

Looks like I was using this via feedburner, so I just updated it at the 
feedburner level. 

On Tuesday, March 12, 2013 7:57:46 AM UTC+5:30, Russell Keith-Magee wrote:
>
> Hi Shabda,
>
> I've got hold of the server logs - the feeds are tied into a bigger 
> framework for actually gathering the blog entries, and older feeds are 
> resisting change :-)
>
> There are two options here:
>
>  * You should be able edit the feed yourself: visit 
> http://www.djangoproject.com/community/mine and update the details.
>
>  * Try deleting the feed and re-adding it.
>
> If you're still having problems, try emailing 
> ja...@jacobian.org- he's got the keys to the servers, and should 
> be able to fix things at a 
> low level.
>
> Yours,
> Russ Magee %-)
>
> On Tue, Mar 12, 2013 at 8:21 AM, Russell Keith-Magee <
> rus...@keith-magee.com > wrote:
>
>> Hi Shabda,
>>
>> I took a look at this for you, but for some reason the new URL is 
>> throwing an error (on our end) when I try and update it. I'll keep digging 
>> and let you know when it's working.
>>  
>> Yours,
>> Russ Magee %-)
>>
>>
>> On Mon, Mar 11, 2013 at 8:34 PM, Shabda Raaj <sha...@agiliq.com
>> > wrote:
>>
>>> Hello,
>>>
>>> The Django community RSS feeds has a form to add new RSS: 
>>> https://www.djangoproject.com/community/add/blogs/
>>>
>>> We have our RSS added in this from way back. However sometime we write 
>>> about non-django stuff, which is not relevant in this feed. I would like to 
>>> update this to our Django only feed:
>>>
>>> http://agiliq.com/blog/rss/latest/django/
>>>
>>> Can someone with access do this? (or advise me who can I contact to edit 
>>> this.)
>>>
>>> -- 
>>> You received this message because you are subscribed to the Google 
>>> Groups "Django users" group.
>>> To unsubscribe from this group and stop receiving emails from it, send 
>>> an email to django-users...@googlegroups.com .
>>> To post to this group, send email to django...@googlegroups.com
>>> .
>>> Visit this group at http://groups.google.com/group/django-users?hl=en.
>>> For more options, visit https://groups.google.com/groups/opt_out.
>>>  
>>>  
>>>
>>
>>
>

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Editing the RSS in the Django community feeds

[Shabda Raaj]

Hello,

The Django community RSS feeds has a form to add new RSS: 
https://www.djangoproject.com/community/add/blogs/

We have our RSS added in this from way back. However sometime we write 
about non-django stuff, which is not relevant in this feed. I would like to 
update this to our Django only feed:

http://agiliq.com/blog/rss/latest/django/

Can someone with access do this? (or advise me who can I contact to edit 
this.)

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[Announce]Django-parsley: Easy client side validations for Django

[Shabda Raaj]

I would like to announce our new app: Django Parsley - 
https://github.com/agiliq/django-parsley

Django forms give you nice server side validations for free. This library 
adds client side valiadtions with very little effort to you your forms, 
using parsley.js.

Patches and feedback welcome.

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Django Design Patterns and Djen of Django books on Kindle Store

[Shabda Raaj]

We have published our Ebooks on Kindle Store and would love to get
some reviews. (Just $1 each)

http://www.amazon.com/The-Djen-of-Django-ebook/dp/B006P1K0YY/ref=ntt_at_ep_dpt_2
http://www.amazon.com/Django-Design-Patterns-ebook/dp/B006OYO9SK/ref=ntt_at_ep_dpt_1

(They are also available for free should you prefer that.)

http://agiliq.com/books/djenofdjango/
http://agiliq.com/books/djangodesignpatterns/

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Re: Getting started with Django: New Udemy Class, free for a limited time

[Shabda Raaj]

I was hoping to get about 100 people in a month, but we already have
289 people signed up in a week. :). I wasn't expecting this. (You can
verify this at Udemy.)

Because I am still adding the content, I am keeping the price to $9
for the whole of February, and would raise once I am done with adding
the tutorials.

You can join here:
http://www.udemy.com/getting-started-with-django2/

Whats added already.

1. 4 part screencast for the four part Django tutorial.
2. Screencasts on using pip, pep8.py, pyflakes, ipython.
3. PDF versions of Django design patterns and Djen of Django book.
4. Various other tutorials.
5. Code samples of all code written in the screencasts and the
tutorials.

On Jan 28, 11:13 pm, Shabda Raaj <sha...@agiliq.com> wrote:
> Here is the link:http://www.udemy.com/getting-started-with-django2/
>
> More info:
> I am starting aUdemyclass called  "Getting started with Django".
> This is supposed to be a fast paced introduction to Django, and is
> going to be useful to people from beginner to intermediate Django
> skills.
>
> Please join:http://www.udemy.com/getting-started-with-django2/or
> forward to people who may be interested. I am keeping the course free
> for the first 100 people, and I am going to set the price to 149$
> once
> we have the 100 people signed up.

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Getting started with Django: New Udemy Class, free for a limited time

[Shabda Raaj]

Here is the link:
http://www.udemy.com/getting-started-with-django2/

More info:
I am starting a Udemy class called  "Getting started with Django".
This is supposed to be a fast paced introduction to Django, and is
going to be useful to people from beginner to intermediate Django
skills.

Please join: http://www.udemy.com/getting-started-with-django2/ or
forward to people who may be interested. I am keeping the course free
for the first 100 people, and I am going to set the price to 149$
once
we have the 100 people signed up.

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Cross post from Djangoindia list: [Pycon] IRC Meeting to discuss how to represent Django

[shabda]

[Repost from djangoindia(http://groups.google.com/group/djangoindia)
list. Please reply there(http://groups.google.com/group/djangoindia/
browse_thread/thread/72c220038d52f12c) if you are interested.]

Hi,
With Pycon's talk submission deadline just a week away and only 1
talk on our favourite web framework, I suggest that we organize
an IRC meeting hopefully on August 15th (Saturday around evening)
and discuss our plans to increase the representation of Django at
Pycon.

Pycon India happens to give us an opportunity to deliver
collaborative
talks, conduct sprints and also have BoF [1] sessions.

Shabda will let us know the venue of the IRC meeting. In the meantime,
let us decide on a suitable timing for the meeting.
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Re: Value proposition of Rails

[shabda raaj]

>Nobody ever releases accurate information on site information, so
>anything you get here will be a guess. "Five biggest" is kind of a bad
>number anyway, since your customer won't be any of them and it's
>unlikely you're targeting them as your customers (if you're only looking
>at the five biggest, you're missing out on the other few thousand).

>Better to look at established companies or busy sites using Django,
>rather than saying you had to go as far as the top five to find anything
>decent.

I want to use that to answer does Django work efficiently and does it
scale?
When you get asked "My Database has N-Gazillion rows and app needs x
concurrent users",
showing some sites which use Django and push 500,000 pageviews per day
would be good.

I tried to glean this information from Djangosites and corelate to
Alexa, but maybe
I am missing some other big ones.

On Mar 19, 6:37 am, Malcolm Tredinnick 
wrote:
> On Wed, 2009-03-18 at 12:23 -0700,shabdawrote:
> > [Trying not be trollish, but the subject might be so. My apologies in
> > advance.]
>
> > I run a small Django development firm (www.uswaretech.com), and a
> > lot of clients we go after need to be convinced on why they should
> > choose Django. What is your experience in this? Specifically am I
> > looking for is,
>
> > 1. Why choose Django over J2EE
> > 2. Why choose Django over RoR
> > 3. Why choose Django over PHP
>
> The answer to all of these isn't necessarily to do it, for a customer.
> It depends on what resources they have available. There are plenty of
> cases where Ruby on Rails is a better choice for an organisation than
> Django simply because they have Ruby developers available.
>
> Also, remember that none of these are an either/or proposition. All can
> work together (indeed Django on Jython inside Tomcat, or similar, is
> going to be a huge thing, I suspect). As a consultant both as an
> individual and as part of a corporate consulting group, I've found it
> better to pitch the value of using Python/Django/whatever and why it
> solves the problem for an effective cost or timetable or whatever the
> client's particular pressing issue is, rather than saying the others are
> worse choices. For things like Java and Ruby, it's going to be a bit
> insane to diss the languages, as they simply aren't that bad in the
> corporate world.
>
> Even PHP: I mean, Flickr, Wikipedia, Yahoo -- these are some pretty
> large sites running on PHP. Another poster's comment about the ability
> to hire good talent is valid, but that also counts against Python (and
> Ruby). Corporate clients, particularly, become concerned over the
> scarcity of available developers.
>
> > 4. What are the five biggest Django sites, (In number of absolute
> > pageviews.)
>
> Nobody ever releases accurate information on site information, so
> anything you get here will be a guess. "Five biggest" is kind of a bad
> number anyway, since your customer won't be any of them and it's
> unlikely you're targeting them as your customers (if you're only looking
> at the five biggest, you're missing out on the other few thousand).
>
> Better to look at established companies or busy sites using Django,
> rather than saying you had to go as far as the top five to find anything
> decent.
>
> Regards,
> Malcolm
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Re: Value proposition of Rails

[shabda raaj]

Ok, I am stupid! I was reading an article and mistyped!
http://jooto.com/blog/index.php/2005/10/29/rails-value-proposition/

On Mar 19, 12:23 am, shabda <shabda.r...@gmail.com> wrote:
> [Trying not be trollish, but the subject might be so. My apologies in
> advance.]
>
> I run a small Django development firm (www.uswaretech.com), and a
> lot of clients we go after need to be convinced on why they should
> choose Django. What is your experience in this? Specifically am I
> looking for is,
>
> 1. Why choose Django over J2EE
> 2. Why choose Django over RoR
> 3. Why choose Django over PHP
> 4. What are the five biggest Django sites, (In number of absolute
> pageviews.)
> 5. Objective Benchmarks, Industry Reports, Anectodal evidence, and
> testimonials
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Value proposition of Rails

[shabda]

[Trying not be trollish, but the subject might be so. My apologies in
advance.]

I run a small Django development firm ( www.uswaretech.com ), and a
lot of clients we go after need to be convinced on why they should
choose Django. What is your experience in this? Specifically am I
looking for is,

1. Why choose Django over J2EE
2. Why choose Django over RoR
3. Why choose Django over PHP
4. What are the five biggest Django sites, (In number of absolute
pageviews.)
5. Objective Benchmarks, Industry Reports, Anectodal evidence, and
testimonials
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Writing a subclassable Django singleton model

[shabda]

I am trying to write a singleton model which can be subclassed.

from django.db import models

class Singleton(models.Model):
name = models.TextField()

def save(self):
if self.__class__.objects.all().count():
#There exists another object in the DB
obj = self.__class__.objects.all()[0]
for field in self._meta.fields:
if not field.name == self._meta.auto_field.name:
setattr(obj, field.name, getattr(self,
field.name))
super(Singleton, obj).save()
else:
super(Singleton, self).save()

class SubSingleton(Singleton):
tag  = models.TextField()


I want an API like this,

In [1]: from testf.models import SubSingleton

In [2]: SubSingleton.objects.all().delete()

In [3]: x=SubSingleton(name='a', tag='b')

In [4]: x.save()

In [5]: SubSingleton.objects.count()
Out[5]: 1

In [6]: y=SubSingleton(name='a', tag='b')

In [7]: y.save()
---
AttributeErrorTraceback (most recent call
last)

/home/shabda/django_design_pats/ in ()

/home/shabda/django_design_pats/testf/models.pyc in save(self)
  9 obj = self.__class__.objects.all()[0]
 10 for field in self._meta.fields:
---> 11 if not field.name ==
self._meta.auto_field.name:
 12 setattr(obj, field.name, getattr(self,
field.name))
 13 super(Singleton, obj).save()

AttributeError: 'NoneType' object has no attribute 'name'

In [8]: SubSingleton.objects.count()
Out[8]: 1

So SubSingleton._meta.auto_field is none, while I expect it to be a
AutoField with name ='id'.

What am I missing?


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Anyone maintaining a Svn repo for django-registration?

[shabda]

Django registration has moved from googlecode to Bitbucket, which
means my projects which are svn:externaled to django-registration
might not get the latest code. Is anyone maintaining an svn repository
which is I can svn:external to?
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Is there a place from where I can get the completed code for the Django 4-part tutorial?

[shabda]

Is there a place where I can get the app completed as part of
http://docs.djangoproject.com/en/dev/intro/tutorial04/#intro-tutorial04
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How do test Middleware

[shabda]

I want to write some test for my middleware seperate from the views
that would be using them. So I am using this snippet
http://www.djangosnippets.org/snippets/963/ to get a request, and
calling my middleware with it to test it, but it looks a little
hackish to me. Is there a better way?
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Filtering the modelform in Admin on request.user

[shabda]

I have an Admin site which I want to filter based on request.user.

My ModelAdmin class is something like this,

class FilterOnUser(admin.ModelAdmin):
def queryset(self, request):
return self.model._default_manager.filter(user = request.user)

def get_form(self, request, obj=None, **kwargs):
form_class = super(FilterOnUser, self).get_form(self, request,
**kwargs)
class MyModelForm(form_class):
def get_queryset(self):
import pdb
pdb.set_trace()
return super(MyModelForm,
self).get_queryset().filter(board = request.board)
 return MyModelForm

So when I navigate to the change view on my admin site the
pdb.set_trace is not hit. What am I doing wrong?



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Re: Why is my string not auto escaped?

[shabda]

So if these built in filters are marking my strings safe, inspite of
unsafe data being passed in, should they not handle escaping as well?

Rajesh Dhawan wrote:
> On Oct 29, 8:35 am, shabda <[EMAIL PROTECTED]> wrote:
> > I need to create a custom filter which displays some data from db
> > depending on its data type.
> >
> > My code is something like,
> >
> > from django.template.defaultfilters import linebreaks, urlize
> >
> > def filterxx(data)
> >  return linebreaks(urlize(data.value))
> >
> > My data.value is
> >
> > Asdfghjkl
> >
> > alert('hole')
> >
> > This is used in templates, and shows up unescaped, which allows users
> > to run arbitrary scripts. What am I doing wrong?
>
> Your filter is internally calling the linebreaks and urlize built-in
> filters which end up wrapping that filter's return value into a "safe
> string" via django.utils.safestring.mark_safe().
>
> See:
> http://docs.djangoproject.com/en/dev/howto/custom-template-tags/#filters-and-auto-escaping
>
> You should escape your data.value explicitly before passing it on to
> those functions. The second bullet point in the above document shows
> how you would achieve conditional escaping of data.value in your
> filter.
>
> -RD
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Why is my string not auto escaped?

[shabda]

I need to create a custom filter which displays some data from db
depending on its data type.

My code is something like,

from django.template.defaultfilters import linebreaks, urlize

def filterxx(data)
 return linebreaks(urlize(data.value))

My data.value is

Asdfghjkl

alert('hole')

This is used in templates, and shows up unescaped, which allows users
to run arbitrary scripts. What am I doing wrong?
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How to get the Html representation of forms.Fields

[shabda]

I have some forms.Fields, which are not attached to any forms.Form.
How can I get the Html representation of it?
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Re: trying to understand get_absolute_url, NoReverseMatch and url configs

[shabda]

You want something like this

@models.permalink
def get_absolute_url(self):
 return ('orgs.views.org', [self.type.slug, self.slug])

Essentially, you code would be doing something like reverse('/org/
hoa/', kwargs={..}) which fails. Templates supress Exceptions so you
do not see them.


On Oct 27, 9:48 pm, bobhaugen <[EMAIL PROTECTED]> wrote:
> Altho I have read alot of the relevant documentation, and searched
> this group and the Web, I remain confused about these topics and their
> relationships.  Something is not sticking in my brain.
>
> I usually get something working by blind cut and paste.  Looking for a
> more conceptual explanation, or even some pointers to where to look
> next.
>
> Here's my current problem:
>
> in models.py:
>
>     def get_absolute_url(self):
>         prefix = "/org/%s/" % self.type.slug
>         return (prefix, None, {"org_slug": iri_to_uri(self.slug)})
>
> in urls.py:
>
>     url(r'^org/(\w)+/(?P[-\w]+)/$', 'orgs.views.org',
> name='org'),
>
> in a template:
>
>     {{ org.get_absolute_url }}
>
> returns nothing.  No error message.
>
> Error message from the shell:
>
> >>>org,get_absolute_url()
>
> [...]
> NoReverseMatch: Reverse for '/org/hoa/' with arguments '()' and
> keyword arguments '{'org_slug': 'cp'}' not found.
>
> If I enter the urlhttp://127.0.0.1:8000/org/hoa/cp/in the address
> bar, it works fine.
>
> Using current trunk and the Django dev server.
>
> What am I missing?
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Order of fields reset on Dynamically generated Forms.

[shabda]

I need to use DynamicForm(form generated using database values), so I
am using this method, 
http://uswaretech.com/blog/2008/10/dynamic-forms-with-django/

Now the order in which I define the fields is not the same as that for
the rendered Html. If I change the line like setattr(EmployeeForm,
field.name, copy(type_mapping[field.type])), to setattr(EmployeeForm,
field.name, forms.CharField()), the order is maintained. Any pointers?

[
Intially I though that return type('EmployeeForm', (forms.Form, ),
dict(EmployeeForm.__dict__)), messes up the order, as
dict(EmpForm.__dict__) would not keep order, as dicts are unordered,
but somehow the order is being maintained even with this line, but
setattr(EmployeeForm, field.name, forms.CharField())
]
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Re: Feature like "acts_as" in Django ORM or contrib ?

[shabda]

Ordering:

qs = Model.objects.filter(...).order_by('ordering_field')
ord_list = [el for el in qs]

Versioning:

code.google.com/p/django-rcsfield

(There are a few others, cant remember the names offhand.)

On Oct 21, 12:13 pm, "[EMAIL PROTECTED]"
<[EMAIL PROTECTED]> wrote:
> On 21 oct, 08:37, Daniel Roseman <[EMAIL PROTECTED]>
> wrote:
>
>
>
> > acts_as is a Ruby design pattern rather than a Python one. However,
> > for the specific higher/lower functionality, look into 
> > django-mptt:http://code.google.com/p/django-mptt/
>
> Very good.
>
> Do you know something to do :
>
> * ordered list
> * versionning
>
> ?
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Re: Possible pug with Model inheritence - Inserts instead of Update

[shabda]

As long as model_obj.id is None, Django does an Insert, I want an
insert to happen all the time. (Sort of like trying to get
FullHistory, wherein I can roll back my object to a previous state. I
can do save(force_insert = True), but that also gives me an
Exception.)

On Oct 12, 6:32 pm, felix <[EMAIL PROTECTED]> wrote:
> well this is interesting and curious what you are trying to do.
> why are you trying to do this self.id= None ?
>
> what is the real world purpose ?  can you give a non abstract
> example ?
>
> in any case since Bar is a subclass of Foo there are two database
> tables.
> you set Bar id to None,
> but the object still has a Foo ptr id, so ultimately there is still
> only one object.
> that is, I think, the primary key that is accessed when using
> Bar.objects.all()
>
> really, you have broken it by this self.id = None,
> so I would expect more problems
>
> On Oct 12, 9:16 am, shabda <[EMAIL PROTECTED]> wrote:
>
> > My models.py
>
> > class Foo(models.Model):
> >     name = models.CharField(max_length = 100)
>
> >     def save(self):
> >         self.id = None
> >         super(Foo, self).save()
>
> > class Bar(Foo):
> >     created = models.DateTimeField(auto_now_add = 1)
>
> > This gives me,
>
> > In [1]: from djcalendar.models import Foo
>
> > In [2]: shabda  = Foo(name = 'Shabda')
>
> > In [3]: shabda.save()
>
> > In [4]: Foo.objects.all()
> > Out[4]: []
>
> > In [5]: shabda.name = 'Shabda Raaj'
>
> > In [6]: shabda.save()
>
> > In [7]: Foo.objects.all()
> > Out[7]: [, ]
>
> > Which is what I expect. Now doing the same thing to Bar
>
> > In [1]: from djcalendar.models import Bar
>
> > In [2]: shabda  = Bar(name = 'Shabda')
>
> > In [3]: shabda.save()
>
> > In [4]: shabda.name = 'Shabda Raaj'
>
> > In [5]: shabda.save()
>
> > In [6]: Bar.objects.all()
> > Out[6]: []
>
> > Here I am expecting two objects, similar to what happened with Foo,
> > but I get only one.
>
> > Am I missing something, or is this a bug?
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How can I check which view is being called in response to a specific Url?

[shabda]

One of my views is returning a Http404, and I think it is calling a
view function diffrent from what I am expecting to be called.

So How can I check which view is being called in response to a
specific Url?
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Possible pug with Model inheritence - Inserts instead of Update

[shabda]

My models.py

class Foo(models.Model):
name = models.CharField(max_length = 100)

def save(self):
self.id = None
super(Foo, self).save()

class Bar(Foo):
created = models.DateTimeField(auto_now_add = 1)


This gives me,

In [1]: from djcalendar.models import Foo

In [2]: shabda  = Foo(name = 'Shabda')

In [3]: shabda.save()

In [4]: Foo.objects.all()
Out[4]: []

In [5]: shabda.name = 'Shabda Raaj'

In [6]: shabda.save()

In [7]: Foo.objects.all()
Out[7]: [, ]


Which is what I expect. Now doing the same thing to Bar

In [1]: from djcalendar.models import Bar

In [2]: shabda  = Bar(name = 'Shabda')

In [3]: shabda.save()

In [4]: shabda.name = 'Shabda Raaj'

In [5]: shabda.save()

In [6]: Bar.objects.all()
Out[6]: []

Here I am expecting two objects, similar to what happened with Foo,
but I get only one.

Am I missing something, or is this a bug?
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Arbitrary precision arithmetic in django

[shabda]

I need to do some Financial calculations in an app in Django.
models.DecimalField is fixed precision, while I need an arbitrary
precision field. How can I do this?


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Django test Client problems

[shabda]

I have some code like this,

c = Client()
client.get('/myurl/')

where '//myurl' calls view function,

def foo(request):
   ip_addrs = request.META['REMOTE_ADDR']

This view function works when I use a browser, as
request.META['REMOTE_ADDR'] is populated. But when I use test Client,
I get a keyerror, as resquests generated by Clinet()  do not have
request.META['REMOTE_ADDR']  populated.

Related question, how do I set a value on requests.sessions before
making a call to Client().get()
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Re: Django Tutorial Clarification

[shabda]

> I have never used generic views, so share your confusion

Well you really should. :)
Well I have seen your name many times on the list so know that you are
a longtime Django user. If you are not using generic views, you are
missing something.

On Jun 13, 12:41 pm, Kenneth Gonsalves <[EMAIL PROTECTED]> wrote:
> On 13-Jun-08, at 12:54 PM, wave connexion(BQ) wrote:
>
> > 1. in reading overview, "you've got a free, and rich, Python API to
> > access your data. The API is created on the fly, no code generation
> > necessary?"
>
> > Does this mean Django generated API code for you?
>
> django does not generate a single line of code - unlike some other
> frameworks which need to generate all sorts of files with all sorts
> of rules about filenames and position of the file.
>
>
>
> > 2. in tutorial part 1, "What's the difference between a project and
> > an app? An app is a Web application that does something — e.g., a
> > weblog system, a database of public records or a simple poll app. A
> > project is a collection of configuration and apps for a particular
> > Web site. A project can contain multiple apps. An app can be in
> > multiple projects."
>
> > Here, that an app can be in multiple projects means the app code
> > can be copied/imported into different projects rather than shared
> > between different projects?
>
> app code can be imported into different projects. apps need not be
> under the project directory, they can be anywhere in the file system
> as long as django can find them (installed apps).
>
>
>
> > 3. in tutorial part 4 -
> > "Use generic views: Less code is better...
> > url(r'^(?P\d+)/results/$',
> > 'django.views.generic.list_detail.object_detail', dict(info_dict,
> > template_name='polls/results.html'), 'poll_results'), "
>
> > not very clear on this. more explanation is appreciated.
>
> I have never used generic views, so share your confusion
>
> --
>
> regards
> kghttp://lawgon.livejournal.comhttp://nrcfosshelpline.in/code/
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Re: oracle-django problem

[shabda]

Or use this,
>From http://www.djangoproject.com/documentation/model-api/#table-names
"To override the database table name, use the db_table parameter in
class Meta."

On Jun 9, 7:46 pm, "Karen Tracey" <[EMAIL PROTECTED]> wrote:
> On Mon, Jun 9, 2008 at 6:43 AM, Harish <[EMAIL PROTECTED]> wrote:
>
> > hi friends
>
> >  i have a django application, which works on postgres as back-end.
> > now i want to migrate the application  back-end  from postgres to
> > oracle.
>
> > The problem i am facing is that, the existing data table names  in
> > postgres is too long
> > (basically  the table name is a combination of application name and
> > class name), which is not allowed
> > in oracle. (using oracle 11g) Basically oracle only allows 30
> > character as table name.
>
> > I am looking forward for any solution to my problem
>
> It isn't clear if you are actually encountering a problem or just
> anticipating one.  I have no experience with Oracle, but it would seem that
> the "naming issues" note here:
>
> http://www.djangoproject.com/documentation/databases/#naming-issues
>
> indicates that the developers of the Oracle support were aware of this issue
> and dealt with it.  Are you running into a problem with this method of
> handling the Oracle limitation?
>
> Karen
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Trouble trying to use formtools.preview.FormPreview

[shabda]

I am trying to use formtools.preview.FormPreview after reading
http://www.djangoproject.com/documentation/form_preview/ and am
getting weird errors.
This is what I did,

1. Have a form called AddReviewForm which is working as expected.
2. Created a class
class ReviewPreviewForm(FormPreview):

def done(self, request, cleaned_data):
import pdb
pdb.set_trace()
3. In my urls.py added this line
url(r'^post/$', ReviewPreviewForm(AddReviewForm),
name='reviews_preview'),
4. Changed template to post the form to '/post/'
5. Now I am expecting that the preview should appear on form posting,
but I am getting exception with traceback,

Traceback:
File "C:\Python25.1\lib\site-packages\django\core\handlers\base.py" in
get_response
  82. response = callback(request, *callback_args,
**callback_kwargs)
File "C:\Python25.1\lib\site-packages\django\contrib\formtools
\preview.py" in __call__
  31. return method(request)
File "C:\Python25.1\lib\site-packages\django\contrib\formtools
\preview.py" in preview_post
  58. f = self.form(request.POST, auto_id=AUTO_ID)

Exception Type: TypeError at /reviews/post/
Exception Value: __init__() takes at least 4 non-keyword arguments (2
given)

What am I doing wrong?


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Getting template errors before control goes to Django (Or so it seems)

[shabda]

I am trying to access an URL, and I get an error like this,

Traceback (most recent call last):

  File "C:\Python25.1\lib\site-packages\django\core\servers
\basehttp.py", line 277, in run
self.result = application(self.environ, self.start_response)

  File "C:\Python25.1\lib\site-packages\django\core\servers
\basehttp.py", line 631, in __call__
return self.application(environ, start_response)

  File "C:\Python25.1\lib\site-packages\django\core\handlers\wsgi.py",
line 205, in __call__
response = self.get_response(request)

  File "C:\Python25.1\lib\site-packages\django\core\handlers\base.py",
line 108, in get_response
return callback(request, **param_dict)

  File "C:\Python25.1\lib\site-packages\django\views\defaults.py",
line 80, in page_not_found
return http.HttpResponseNotFound(t.render(RequestContext(request,
{'request_path': request.path})))

  File "C:\Python25.1\lib\site-packages\django\template\__init__.py",
line 176, in render
return self.nodelist.render(context)

  File "C:\Python25.1\lib\site-packages\django\template\__init__.py",
line 751, in render
bits.append(self.render_node(node, context))

  File "C:\Python25.1\lib\site-packages\django\template\__init__.py",
line 764, in render_node
return node.render(context)

  File "C:\Python25.1\lib\site-packages\django\template
\loader_tags.py", line 71, in render
compiled_parent = self.get_parent(context)

  File "C:\Python25.1\lib\site-packages\django\template
\loader_tags.py", line 66, in get_parent
raise TemplateSyntaxError, "Template %r cannot be extended,
because it doesn't exist" % parent

TemplateSyntaxError: Template u'base.html' cannot be extended, because
it doesn't exist

So I cannot understand which template is extending 'base.html', from
the traceback. Also, he traceback shows up as raw traceback, not as
the formatted page which Django shows!
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Django-India Google group

[shabda]

Hello All Django people based in India!

Did you know that there was no django-india Google group? Ouch.

So I have created the Django-India google group. [http://
groups.google.com/group/djangoindia]. If you are a django-developer
based in India join this group, so we have a centraol place to find
and talk to other Django people based in India.

Here is the text of welcome post of Django-india
-

Django India is a group of Django people based in India. (Wasn't that
insightful?).

There is still very limited recognition about Django in India. And
there is no central place to find and talk to other Django people from
India. For example if you are A Django developer looking for local
jobs, there aren't many places apart from www.djangogigs.com. Or if
you have a startup looking for  skilled Django people, it can get
**really** hard. In this group, let us try to overcome this
shortcoming.

Let us decide the group charter when we have some people, but I am
thinking along these lines,
1. Help promote Django in India.
2. Organize local meetups.
3. Repository of Indian Startups/Companies/People using Django.
4. Help each other. :)
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Installing GeoDjango help

[shabda]

Is there a simpler way to install GeoDjango, than the one mentioned at
http://code.djangoproject.com/wiki/GeoDjangoInstall ?

Also is there any documentation about GeoDjango apart form the one at
the wiki?


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Announce: Djikiki - Django wiki application

[shabda]

Wanted to announce Djikiki - A Django based wiki to the community.
Looks like there is no Django wiki, well apart from [1]. I had this
done a few months ago, but I wanted to polish thing up a bit before I
announced it here, but I guess right now I am going to be sorta busy
for a long time with www.42topics.com, so here is Djikiki.

Source is available from,
http://code.google.com/p/djikiki/

An install for Djikiki can be seen at
www.djikiki.com

Its features include

   1. All pages are versioned. (It is a wiki, what do you expect. )
   2. All pages have an associated discussion page. (Which is also
versioned.)
   3. See edit history, for all users, all pages etc.
   4. Featured pages.
   5. Only registered users can edit. (But registering takes a few
second).
   6. Wikicreole based markup.

Please take it for a spin. Feedback, patches welcome. :)

[1] http://showmedo.com/videos/video?name=110=110
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[Repost] Error with .extra(tables=[]) after qs-rf

[shabda]

Reposting:

Essentially my question is, what does

"If that isn’t possible, put your
extra() call at the front of the queryset construction so that your
table is the first use of that table."

mean? If I have overriden .get_query_set, to add a .extra, how can I
move it too beginning of queryset construction?

[Previous post]
-
I have a queryset with .extra call where I do something like this,

self.get_query_set().extra
...
tables=['news_topic as permission_table']
..

Pre qs-rf, the values in tables were not being escaped and so this was
working, with qs-rf the value in tables is escaped, so my code fails.

http://www.djangoproject.com/documentation/db-api/#extra-select-none-...

tells me,
[1]First, see if you can get by without including the extra table and
use the one already in the query. [2]If that isn’t possible, put your
extra() call at the front of the queryset construction so that your
table is the first use of that table. [3]Finally, if all else fails,
look at the query produced and rewrite your where addition to use the
alias given to your extra table. The alias will be the same each time
you construct the queryset in the same way, so you can rely upon the
alias name to not change.

1. I need this table an extra time.
2. I do not understand this.

My code is somethings like this,

class LinkManager(models.Model):
  def get_query_set():
 super(LinkManager, self).get_query_set().extra()

  def get_query_set_with_user(self, user):
  return self.get_query_set().extra()

The erros comes in get_query_set_with_user, and I have extra call in
get_query_set(), so I guess I can not do this.

3. I guess I can do this, but it seems sort of fragile. Would it not
be better to have an option to alias?
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Re: Suggestions on UI (client side web) framework to complement Django

[shabda]

We used Dojo for our last project, but there was far too many things
happening behind the scenes, and not really documented. We finally
decided to rewrite evrything in Jquery. Now I never look farther than
JQuery. :)

Andre Meyer wrote:
> On Tue, Apr 29, 2008 at 9:00 PM, Szaijan <[EMAIL PROTECTED]> wrote:
>
> >
> > In searching for a JS toolkit for my first JS app, I found YUI and
> > Dojo to be of equal power and utility, but YUI is MUCH better
> > documented.
>
>
> bad documentation for Dojo is a myth - nowadays. Dojo 1.1 is well documented
> and has a couple of great features that other frameworks lack; just look at
> dojox.gfx or dojox.cometd, for example, as well as http://dojocampus.org/ -
> dojo rocks.
>
> my 2c
> andré
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Re: Tutorial: __str__() problems

[shabda]

Though __str__ should work here, until you can get this working, try
writing __unicode__ method

[EMAIL PROTECTED] wrote:
> Hello,
> I'm just going through the mysite tutorial and can't seem to get the
> __str__() method to work when adding it to the two classes, I still
> get []. This happened before and I'm not really
> sure what fixed it. I'm running .096
>
> polls/models.py:
> from django.db import models
> import datetime
>
> class Poll(models.Model):
> question = models.CharField(maxlength=200)
> pub_date = models.DateTimeField('date published')
> def __str__(self):
>   return self.question
> def was_published_today(self):
> return self.pub_date.date() == datetime.date.today()
>
> class Choice(models.Model):
>   poll = models.ForeignKey(Poll)
>   choice = models.CharField(maxlength=200)
>   votes = models.IntegerField()
>   def __str__(self):
>  return self.choice
>
> Thanks for any help,
> Jason
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Re: Tutorial: __str__() problems

[shabda]

Though __str__ should work here, until you can get this working, try
writing __unicode__ method

[EMAIL PROTECTED] wrote:
> Hello,
> I'm just going through the mysite tutorial and can't seem to get the
> __str__() method to work when adding it to the two classes, I still
> get []. This happened before and I'm not really
> sure what fixed it. I'm running .096
>
> polls/models.py:
> from django.db import models
> import datetime
>
> class Poll(models.Model):
> question = models.CharField(maxlength=200)
> pub_date = models.DateTimeField('date published')
> def __str__(self):
>   return self.question
> def was_published_today(self):
> return self.pub_date.date() == datetime.date.today()
>
> class Choice(models.Model):
>   poll = models.ForeignKey(Poll)
>   choice = models.CharField(maxlength=200)
>   votes = models.IntegerField()
>   def __str__(self):
>  return self.choice
>
> Thanks for any help,
> Jason
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Regression with QS-RF

[shabda]

I have a queryset with .extra call where I do something like this,

self.get_query_set().extra
...
tables=['news_topic as permission_table']
..

Pre qs-rf, the values in tables were not being escaped and so this was
working, with qs-rf the value in tables is escaped, so my code fails.

http://www.djangoproject.com/documentation/db-api/#extra-select-none-where-none-params-none-tables-none-order-by-none-select-params-none

tells me,
[1]First, see if you can get by without including the extra table and
use the one already in the query. [2]If that isn’t possible, put your
extra() call at the front of the queryset construction so that your
table is the first use of that table. [3]Finally, if all else fails,
look at the query produced and rewrite your where addition to use the
alias given to your extra table. The alias will be the same each time
you construct the queryset in the same way, so you can rely upon the
alias name to not change.

1. I need this table an extra time.
2. I do not understand this.

My code is somethings like this,

class LinkManager(models.Model):
  def get_query_set():
 super(LinkManager, self).get_query_set().extra()

  def get_query_set_with_user(self, user):
  return self.get_query_set().extra()

The erros comes in get_query_set_with_user, and I have extra call in
get_query_set(), so I guess I can not do this.

3. I guess I can do this, but it seems sort of fragile. Would it not
be better to have an option to alias?
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Re: Multi DB question

[shabda]

>You could use SQLAlchemy to access your forum database, as long as you
>don't need it in the admin.

As, I just need to access the other DB in one place, I think this is
the way to go here.

On Apr 17, 7:50 pm, "Ariel Mauricio Nunez Gomez"
<[EMAIL PROTECTED]> wrote:
> On Thu, Apr 17, 2008 at 6:00 AM, shabda <[EMAIL PROTECTED]> wrote:
>
> > I have a forum(non-Django) and a Django app both are in different
> > databases.
>
> Can you install django on the forum database? It would probably make your
> life a lot easier as you could write custom django models to use the forum
> app tables and handle them via the admin or scripts.
>
> Regards,
> Ariel.
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Multi DB question

[shabda]

I have a forum(non-Django) and a Django app both are in different
databases. When a user is created in the Django I want to create
another User in Forum. Do I need to use MultiDB branch for this, or is
there a simpler way? Maybe using python-MysqlDB directly? Is there a
recent merge of Django and MultiDB?
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Dynamic queryset to ModelChoiceField

[shabda]

I have a form where I want to do something like,

class SetDefaultForm(forms.Form):
topics = forms.ModelChoiceField()

def __init__(self, user):
super(SetDefaultForm, self).__init__()
self.fields['topics'].queryset = Topic.objects.filter(user)

This does not work, of course, as ModelChoiceField has queryset as
required argument.

So I have to do something like,

class SetDefaultForm(forms.Form):
topics = forms.ChoiceField()

def __init__(self, user):
super(SetDefaultForm, self).__init__()
self.fields['topics'].choices= [topic for topic in
Topic.objects.filter(user)]

Is there a better way?
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Re: I'd like to learn more about Django internals

[shabda]

I have been meaning to learn the code in django.db, but I can never
get my head around metaclasses enough to do so. Anything you can
suggest, Malcom?

On Apr 12, 5:52 pm, "Erik Vorhes" <[EMAIL PROTECTED]> wrote:
> You might be thinking of this 
> flowchart:http://www.djangobook.com/en/1.0/chapter03/#cn60
>
> Erik
>
> On Sat, Apr 12, 2008 at 7:00 AM, Tim Chase
>
> <[EMAIL PROTECTED]> wrote:
>
> >  > As the subject says, I'd love to learn more about how django
> >  > works internally.
>
> >  One of the best pages I've found detailing this:
>
> >  http://www.b-list.org/weblog/2006/jun/13/how-django-processes-request/
>
> >  There was a nice image/flowchart I stumbled across once, but I
> >  can't disinter it from the web.  Perhaps someone else on the list
> >  will know where to find it.
>
> >  -tim
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Re: How we can integrate Django app in Google appengine.

[shabda]

[Shameless plug :)]
http://www.42topics.com/dumps/django/docs.html
http://www.42topics.com/dumps/appengine/doc.html

On Apr 12, 4:49 pm, Chris Hoeppner <[EMAIL PROTECTED]> wrote:
> I'm not sure wether you're asking how to run django on GAE [1], or how
> to do that using appengine's webapp framework [2].
>
> [1]http://code.google.com/appengine/articles/django.html
> [2]http://code.google.com/appengine/docs/gettingstarted/
>
> Bear in mind that AFAIK right now there's no official way to make django
> components that use the ORM work. Beside that, there's a ticket with a
> patch for a GAE DS session backend [1], and there are efforts to make
> the whole thing tie together too [2].
>
> [1]http://code.djangoproject.com/ticket/7008
> [2]http://code.google.com/p/google-app-engine-django/
>
> ~ Chris
>
> El sáb, 12-04-2008 a las 08:42 -0400, rajiv bammi escribió:
>
> > Dear developers,
>
> > Just a basic query, i am still not able to understand that how we can
> > integrate Django app with Google appengine..
>
> > Let say we have a simple program in Django which says hello world..
> > how using django i can do it in Google Appengine..
>
> > Thanks & Regards
> > Rajiv
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Re: Tree from the model.

[shabda]

Though I do not always use a reusable app, even if it exists, (leaky
abstractions[1]), django-mptt is awesome. It does what it claims to
do, and stays out of the way. Very recommended if you need to model
hierarchical data.

On Apr 11, 11:43 am, "James Bennett" <[EMAIL PROTECTED]> wrote:
> 2008/4/11 Dmitriy Sodrianov <[EMAIL PROTECTED]>:
>
> >  Is it possible to use only Django's built-in functions?
>
> Yes, but you will end up essentially re-implementing all the code in
> the application Alex suggested.
>
> When an application exists that helps you to do what you want, it's
> quite silly to go duplicating all the code.
>
> --
> "Bureaucrat Conrad, you are technically correct -- the best kind of correct."
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Re: Using Django with appengine - Port of the django tutorial for appengine

[shabda]

Oops, gave wrong link. The correct link is 
http://www.42topics.com/dumps/django/docs.html
. That one I wrote yesterday for people who already know Django.

On Apr 10, 11:35 pm, shabda <[EMAIL PROTECTED]> wrote:
> I have tried to write a Django tutorial for Appengine. This can be
> found herehttp://www.42topics.com/dumps/appengine/doc.html. This is a
> port of the django tutorial 
> fromhttp://www.djangoproject.com/documentation/tutorial01/
> to use Appengine. A live install of this can be seen 
> athttp://blogango.appspot.com
> .
> This is released under a creative commons attribution, license, so
> feel free to modify it. The reStructured text doc source can be found
> athttp://www.42topics.com/dumps/django/docs.txt
>
> If you need any help with this, please ask in this thread, and I will
> try to help.
>
> Also I would love to get you feedback about this tutorial, and how can
> I make this better.
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Using Django with appengine - Port of the django tutorial for appengine

[shabda]

I have tried to write a Django tutorial for Appengine. This can be
found here http://www.42topics.com/dumps/appengine/doc.html. This is a
port of the django tutorial from 
http://www.djangoproject.com/documentation/tutorial01/
to use Appengine. A live install of this can be seen at 
http://blogango.appspot.com
.
This is released under a creative commons attribution, license, so
feel free to modify it. The reStructured text doc source can be found
at http://www.42topics.com/dumps/django/docs.txt

If you need any help with this, please ask in this thread, and I will
try to help.

Also I would love to get you feedback about this tutorial, and how can
I make this better.
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Anybody successfully deployed their Django app to Appengine?

[shabda]

Anybody successfully deployed their Django app to Appengine, and
willing to share their code? I have a fair bit of code working on the
dev_webserver, but it fails on deploying. Until the logging bug is
resolved I think I am stuck behind seeing 500 server errors. I am sure
I am missing something obvious, and if I look at somebody's deployed I
can find the problem.
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Appengine, a few questions about imports

[shabda]

In Django's code I see
from imp import find_module [1]

However in google's runtime the app module is empty.[2] Can someone
more experienced than me, tell when this code will be hit, and what
can I do to not hit this code.
[1]
http://www.google.com/search?q=django+%22from+imp+import%22+site%3Acode.djangoproject.com=navclient-ff=UTF-8=1B3GGGL_enIN217IN217=t
[2] http://code.google.com/appengine/docs/python/purepython.html
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Re: When does form.clean get called?

[shabda]

>From my code,
 try:
user = User.objects.get(username__iexact =
self.cleaned_data['username'])
except User.DoesNotExist, KeyError:
raise forms.ValidationError('Invalid username, please try
again.')

if not user.check_password(self.cleaned_data['password']):
raise forms.ValidationError('Invalid password, please try
again.')

So I just want to check that user exists and knows correct password.
The reason I do this in clean is as the order of field.clean is not
guaranteed, I would have to do User.objects.get(username__iexact =
self.cleaned_data['username']) two times with two database hits.
(Probably premature optimisation :) )So essentially what I want to
know should I be always checking
 ``if field in self.cleaned_data:``
before using them in form.clean?

On Apr 9, 7:02 am, Malcolm Tredinnick <[EMAIL PROTECTED]>
wrote:
> On Mon, 2008-04-07 at 07:29 -0700, shabda wrote:
> > So is there a cleaner way to work in form.clean instead of doing
> > if for.cleaned_datahas_key(field):
> > for every element?
>
> It depends what you want to do in the clean() method. The example you
> gave in your first post in this thread is not a good use of clean(),
> since you are just doing single field validation, so you might as well
> have written clean_username and clean_password methods, except you
> didn't need those either because you were just testing if the fields
> were present and for required fields, the default cleaning methods will
> flag that as an error in any case. Basically, the initial example you
> posted needed no extra cleaning methods beyond what Django provides by
> default.
>
> If you're trying to do something else in clean(), explain what you're
> wanting to achieve and we might be able to suggest something.
>
> Regards,
> Malcolm
>
> --
> Depression is merely anger without 
> enthusiasm.http://www.pointy-stick.com/blog/
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Using Django with Appengine tutorial

[shabda]

Hi,

I have written about how to build a Simple Django blog with appengine.
You can find the tutorial here, 
http://www.42topics.com/dumps/appengine/doc.html.
This documents what I learnt playing with appengine yesterday, and is
very much a work in progress. This doc is released under CreateCommon
liscence, so please feel free to modify, (The rest source for this doc
is at http://www.42topics.com/dumps/appengine/docs.txt) and add what
you learnt from it. If you use this tutorial, and have problems,
please ask them in this thread, and I will only be too happy to help.
You can download this working from 
http://www.42topics.com/dumps/appengine/appenginetest1.zip
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Anybody successfully deployed Django to appengine? Having some problems

[shabda]

I am trying to follow http://code.google.com/appengine/articles/django.html

Which has a line
# Log errors.
django.dispatch.dispatcher.connect(
   log_exception, django.core.signals.got_request_exception)

but log_exception is not defined/imported, so it gives a NameError. I
guess they left the correct import. By removing this line I can get
the app to run, but it does not send the tracebacks to admin console.
Any body knows the correct import to use here?
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Re: Anybody used Google app engine, and wanna share their experience?

[shabda]

Ya same here. Will try to play around with it later tonight, but first
looks say running django apps with only modifying the db part should
be possible.

On Apr 8, 10:41 am, davenaff <[EMAIL PROTECTED]> wrote:
> I think everyone was given a denied message initially.  I got an
> acceptance note around 10:15, but haven't had time to play around with
> it yet.
>
> On Apr 7, 9:14 pm, shabda <[EMAIL PROTECTED]> wrote:
>
> > I got the news too late, and no more invites were avialable. Anyone
> > who is using this, and their views ...
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cursor.execute throws exception on MySql warning

[shabda]

I have a  call like,

crsr = connection.cursor()
crsr.execute('DROP TABLE IF EXISTS news_linksearch')

when table news_linksearch does not exists this would lead to a mysql
warning, (Not an error, as it has a IF EXISTS clause), but this leads
to a django exception. Should not the behaviour in this case be not
raising an exception?
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Anybody used Google app engine, and wanna share their experience?

[shabda]

I got the news too late, and no more invites were avialable. Anyone
who is using this, and their views ...
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Re: When does form.clean get called?

[shabda]

So is there a cleaner way to work in form.clean instead of doing
if for.cleaned_datahas_key(field):
for every element?

On Apr 7, 6:06 pm, "Karen Tracey" <[EMAIL PROTECTED]> wrote:
> On Mon, Apr 7, 2008 at 8:19 AM, shabda <[EMAIL PROTECTED]> wrote:
>
> > If I have a required field and I do not specify a value for the field,
> > should form.clean get called? My understanding, after reading
>
> >http://www.djangoproject.com/documentation/newforms/#custom-form-and-...
> > ,
> > is that it should not, as clean_ will fail, and so form.clean
> > will not be called. However this is not happening with my code,
> > details follow.
>
> > I have a form like [http://dpaste.com/43538/]
>
> > [code snipped]
>
> From the page you linked to:
>
> The clean() method for the Form class or subclass is always run. If that
> method raises a ValidationError, cleaned_data will be an empty dictionary.
> This approach allows you to flag all errors in the submitted data at once,
> versus having to force the user through a painful one-by-one
> fix-and-resubmit cycle for a form with multiple errors.
>
> Karen
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When does form.clean get called?

[shabda]

If I have a required field and I do not specify a value for the field,
should form.clean get called? My understanding, after reading
http://www.djangoproject.com/documentation/newforms/#custom-form-and-field-validation,
is that it should not, as clean_ will fail, and so form.clean
will not be called. However this is not happening with my code,
details follow.

I have a form like [http://dpaste.com/43538/]

class LoginForm(forms.Form):
"""Login form for users."""
username = forms.RegexField(r'^[a-zA-Z0-9_]{1,30}$',
max_length = 30,
min_length = 1,
widget =
widgets.TextInput(attrs={'class':'input'}),
error_message = 'Must be 1-30
alphanumeric characters or underscores.',
required = True)
password = MarkedField(min_length = 1,
   max_length = 128,
   widget =
widgets.PasswordInput(attrs={'class':'input'}),
   label = 'Password',
   required = True)
remember_user = forms.BooleanField(required = False,
   label = 'Remember Me')

def clean(self):
import pdb
pdb.set_trace()
super(LoginForm, self).clean()
try:
user = User.objects.get(username__iexact =
self.cleaned_data['username'])
except User.DoesNotExist, KeyError:
raise forms.ValidationError('Invalid username, please try
again.')

if not user.check_password(self.cleaned_data['password']):
raise forms.ValidationError('Invalid password, please try
again.')

return self.cleaned_data

If I do not specify anything for username, password, I am getting a
keyerror. (While I am expecting a vlidation error.)

If I change my code to,

class LoginForm(forms.Form):
"""Login form for users."""
username = forms.RegexField(r'^[a-zA-Z0-9_]{1,30}$',
max_length = 30,
min_length = 1,
widget =
widgets.TextInput(attrs={'class':'input'}),
error_message = 'Must be 1-30
alphanumeric characters or underscores.',
required = True)
password = MarkedField(min_length = 1,
   max_length = 128,
   widget =
widgets.PasswordInput(attrs={'class':'input'}),
   label = 'Password',
   required = True)
remember_user = forms.BooleanField(required = False,
   label = 'Remember Me')

def clean(self):
import pdb
pdb.set_trace()
try:
if self.cleaned_data.has_key('username') :
user = User.objects.get(username__iexact =
self.cleaned_data['username'])
except User.DoesNotExist, KeyError:
raise forms.ValidationError('Invalid username, please try
again.')

if self.cleaned_data.has_key('password') and not
user.check_password(self.cleaned_data['password']):
raise forms.ValidationError('Invalid password, please try
again.')

return self.cleaned_data

This works as expected.
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Making login work with every page.

[shabda]

If a user is not logged in, then on each page, I have a login form.
This form posts to /accounts/login/ which does calls
contrib.auth.views.login. This view only logs in a user if the
session.test_cookie_worked().

So this means that from each page I need to call,
if not request.user.is_authenticated():
if not request.session.test_cookie_worked():
request.session.set_test_cookie()

Is there a easier way?
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Re: Weird unicode errors when using cutsom sql

[shabda]

Ouch, there was a % in the generated SQL. Guess I should have debugged
a little more before posting here. :)

On Apr 5, 1:44 pm, shabda <[EMAIL PROTECTED]> wrote:
> I am using MYSql with latin-1 encoding.
>
> I get some weird intermittent errors when using custom sql. I have a
> large programatically generated sql, and when I try to run this as
> cursor.execute(sql), it works sometime but fails other times. The only
> big difference I can see between the sqls is that whenever it fails it
> has a unicode char. Traceback follows. Any pointers where I should be
> looking to solve this problem.
>
> G:\tapicks\news\cron.py in find_recommeneded_for_username(username)
> 114 import pdb
> 115 pdb.set_trace()
> --> 116 cursor.execute(sql)
> 117 return cursor.fetchall()
> 118
>
> C:\Python24\lib\site-packages\django\db\backends\util.py in
> execute(self, sql, params)
>  19 finally:
>  20 stop = time()
> ---> 21 sql = self.db.ops.last_executed_query(self.cursor,
> sql, params)
>  22 self.db.queries.append({
>  23 'sql': sql,
>
> C:\Python24\lib\site-packages\django\db\backends\__init__.py in
> last_executed_query(self, cursor, sql, params)
> 148 u_params = dict([(to_unicode(k), to_unicode(v))
> for k, v in params.items()])
> 149
> --> 150 return smart_unicode(sql) % u_params
> 151
> 152 def last_insert_id(self, cursor, table_name, pk_name):
>
> TypeError: not enough arguments for format string
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Transactions with custom sql

[shabda]

I am using mysql ith InooDB.
I have some cutsom sql doing inserts. These inserts are not visible
after the function returns, if I so something like
sql = 'INSERT INTO tbl1 ...'
from django.db import connection
cursor = connection.cursor()
cursor.execute(sql)
return cursor.fetchall()

However if I do something like

cursor.execute("set autocommit = 1")
 and then do the above code the inserts are visible in a dirrent mysql
session.

So how does django transaction management work with custom sql, and
would my calling cursor.execute("set autocommit = 1") interfare with
it?
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How to pass location to profiler.hotshot?

[shabda]

By default profiler.hostshot[1] creates profiling info in "/var/log/
cmsprofile". I am on a shred hosting, and do not have access to this
location. Is there any way I can specify the location without
modifying this django file.

Currently this values is hardcoded into this file as
PROFILE_DATA_DIR = "/var/log/cmsprofile"
Should not this be a settings.py variable?

http://code.djangoproject.com/browser/django/trunk/django/core/handlers/profiler-hotshot.py
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Using CsrfMIddleware with ajax post requests

[shabda]

I have a some links, simple  like .. . I handle clicks
on them as ajax, and do a post . I want to protect this post against
CSRF attacks, but CsrfMiddleware works only for form posts,  because
it add a form field. Is there some way I can get the CsrfMiddleware to
work with ajax posts?
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Optional else block in for

[shabda]

I was looking at jinja[1] and there was one feature which I really
liked
"for loops have an optional else block executed if there was no
iteration."

Right now most of my for loops are like,

{% if comments %}

{% for comment in comments %}
{{comment}}
{% endfor %}

{% else %}
There are no comments.
{% endif %}

It would be much `cooler` to write

{% for comment in comments %}
{{comment}}
{% else %}
There are no comments.
{% endfor %}

Of course this is not a huge improvement, but I need to do this so
many times, might be this is a common use case. :)
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Re: sports ratings

[shabda]

Read this, www.b-list.org/weblog/2007/sep/22/standalone-django-scripts/
, and create a standalone django script. Then set up a cron job to run
your script when you want.

On Mar 29, 11:53 pm, ameriblog <[EMAIL PROTECTED]> wrote:
> i have my own formula used for sports ratings (like jeff sagarin, the
> bcs, etc). right now i have an old Visual Basic code that updates the
> ratings and i just save it as a text file and ftp to the web. i'd
> really love to make it dynamic, so it presents better ( 
> likehttp://kenpom.com/rpi.php), but also giving me the option of better
> utilizing the data and do some other studies easily.
>
> i new to django, i'm experienced with php. i could do it in php no
> doubt, but am really looking at doing a few projects in django as
> learning experiences.
>
> the formula isn't complex essentially an adjusted winning percentage
> (wins / games played). the tricky part is doing iterations until the
> ratings stabilize, right now i'm the ratings average out to 0.5 and i
> iterate the ratings over and over until none of them change more than
> 0.1.
>
> my dealings with django have been setting up like a blog, so i'm
> comfortable in writing everything to do with outputting the info once
> it's computed, but haven't done anything where it's a script/code that
> only i run, once a week that computes the ratings.
>
> any tips/tutorials on doing stuff like this?
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Re: How are you storing binary data in db

[shabda]

Yes I was looking for snippets and recipes, not storing them in DB.
There are some instances when storing things in DB is just too
convinient comaring to storing them on files. For example I get some
JSON from a external web service call. I want to cache it in the
system, so I want to just pickle it and dump it i the db. Blob would
be very nice here.

On Mar 28, 10:48 am, "Rishabh Manocha" <[EMAIL PROTECTED]> wrote:
> I think he meant recipes in that are there any recipes to accomplish
> this (storing binary data to the DB). Unless I'm getting this
> completely wrong, he was not talking about cooking recipes :).
>
> I would be interested in a solution for this too. There are cases
> where apps running as the apache/web user do not have write
> permissions to the local FS (an example would be the sourceforge
> servers). In these situations, having your db store this information
> is the only way to go.
>
> Best,
>
> R
>
> On Fri, Mar 28, 2008 at 7:45 AM, Dan Ellis <[EMAIL PROTECTED]> wrote:
>
> >  On Mar 27, 9:05 pm, Mike H <[EMAIL PROTECTED]> wrote:
>
> >  > Reading large
> >  > chunks of file data from a db just wastes db resources
>
> >  A recipe is unlikely to be a large chunk of file data. Pictures of
> >  food, sure, don't store those in the DB. Storing the text in the DB
> >  also means you can make use of its full text searching capability.
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Re: How to check the SQL that the Django ORM is executing?

[shabda]

wouldn't getting the queries from connection.queries be abetter
approach?

On Mar 28, 1:15 am, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
wrote:
> http://www.djangoproject.com/documentation/faq/#how-can-i-see-the-raw...
>
> or
>
> you can make a function like this:
>
> In [19]: def show_sql(query):
>: clauses = query._get_sql_clause()
>: return 'SELECT %s %s' % (', '.join(clauses[0]),
> clauses[1])
>:
>
> In [21]: show_sql(Page.objects.all())
> Out[21]: 'SELECT "main_page"."id", "main_page"."title",
> "main_page"."slug", "main_page"."content"  FROM "main_page" ORDER BY
> "main_page"."id" ASC'
>
> On Mar 27, 3:01 pm, qwerty <[EMAIL PROTECTED]> wrote:
>
> > Hi all,
>
> > I want so see the SQL that the Django ORM is executing behind the
> > scenes. I know that SQLObject has this but I wanted to see if there is
> > some similar functionality in Django. Is it?
>
> > Thanks,
> > Angel
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How are you storing binary data in db

[shabda]

Considering that BlobField is not supported, what are you using to
store binary data. Recipes, snippets ..
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Is identity map planned for Django ORM?

[shabda]

A test case showing the problem http://dpaste.com/41542/ . I always
get bitten by this behaviour when I am writing tests. There was a
discussion long ago about adding this feature of Identity maps
http://groups.google.com/group/django-users/browse_thread/thread/56698424ae3708ea/88496cb950e75c37?lnk=gst=identity+map#88496cb950e75c37
, a very long time ago. Is this feature planned anytime soon?
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Re: Log a user in after registration?

[shabda]

You need to call authenticate() before you can call login()
http://www.djangoproject.com/documentation/authentication/#how-to-log-a-user-in

On Mar 26, 10:52 pm, truebosko <[EMAIL PROTECTED]> wrote:
> I want to log a user in after they have registered on my site.
>
> Right now, I am using django-registration to handle user registration
> but it is modified to not have activation. I know it doesn't really
> matter what I am using as all the login is handled by
> django.contrib.auth
>
> I've looked in the files and tried to replicate it, but all I get is
> various errors. I am probably doing it horrilbly wrong. I simply want
> to pass in the users new information, and then have it log them in
>
> I've tried doing:
>  login(request, new_user)  after my user has registered, new_user is
> the info I get from registering.
>
> login is referencing: from django.contrib.auth import login (I import
> it right beofre that line). I've gotten the following error now:
>
> 'User' object has no attribute 'backend'
> Request Method: POST
> Request URL:http://localhost:8000/accounts/register/
> Exception Type: AttributeError
> Exception Value:'User' object has no attribute 'backend'
>
> Here is my registration code and where I am calling login. What is
> wrong with this?
> if request.method == 'POST':
> form = form_class(request.POST)
> if form.is_valid():
> new_user = form.save(profile_callback=profile_callback)
>
> from django.contrib.auth import login
> login(request, new_user)
>
> return HttpResponseRedirect(success_url)
> else:
> form = form_class()
> return render_to_response(template_name,
>   { 'form': form },
>   context_instance=RequestContext(request))
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Re: How to do background processing with Django

[shabda]

Not the end user but the people who would be downloading this
application, and want to use this, in a shared hosting environment.

On Mar 26, 7:39 pm, "Ian Lawrence" <[EMAIL PROTECTED]> wrote:
> Hi
>
> >  are django and apache. Adding a HTTP server or configuring django-
> >  queuing is too painful for the average user. :(
>
> what does the end user have to do with this?
> you have a server by doing
> wgethttp://svn.cherrypy.org/trunk/cherrypy/wsgiserver/__init__.py-O
> wsgiserver.py
> and setting up xml-rpc is not much more than this...i did this recently 
> athttps://help.ubuntu.com/community/UMEGuide/ApplicationDevelopment/GPS...
> and it is pretty simple to do (and really the best way IMO to run
> background processes)
>
> Ian
>
> --http://ianlawrence.info
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Re: How to do background processing with Django

[shabda]

The problem with these aproaches is that they add an extra layer of
things to do. I want to package it so that the only required things
are django and apache. Adding a HTTP server or configuring django-
queuing is too painful for the average user. :(

On Mar 26, 2:28 pm, Graham Dumpleton <[EMAIL PROTECTED]>
wrote:
> On Mar 26, 7:58 pm, shabda <[EMAIL PROTECTED]> wrote:
>
> > I response to some urls, my views need to start some potentially time
> > taking actions. So how can I start background process, would it be as
> > simple as
>
> > ...
> > t = threading.Thread(...)
> > t.setDaemon(True)
> > t.start()
> > return HttpResponse(..)
>
> > Or does django/apache have limitation on how threading can be used?
> > Would my thread be killed, once the response is sent back?
>
> You are much much better off having a back end process which embeds a
> mini HTTP server set up to respond to XML-RPC requests. The Apache/
> Django processes can then make an XML-RPC request to the long running
> persistent back end process which then does the work in a separate
> thread, via some form of queuing mechanism and thread pooling
> mechanism as needs be to keep number of active threads down, or using
> other means as appropriate.
>
> Being in a single back end process, you can then also support XML-RPC
> requests to check on status of jobs being done, cancel jobs etc etc.
> You also don't then have to deal with the fact that Apache is
> multiprocess and subsequent requests may not come back to the same
> process if something needs to query outcome of job. You also don't
> have to deal with possibility of Apache killing off one its processes,
> which might contain running jobs, when it is recycling its processes.
>
> Graham
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Re: How often do you update your django?

[shabda]

And if you are on windows, TortoiseSvn is a great way to get strated
with svn.

On Mar 26, 3:06 pm, James Tauber <[EMAIL PROTECTED]> wrote:
> It might be worth adding that this approach works for Django because
> development takes place on branches not the trunk. Other open source
> projects may use the trunk for development, in which case what people
> are saying about how often they update Django won't apply to those
> projects.
>
> Just thought I'd add that as the original poster is new to getting
> stuff from svn.
>
> James
>
> On Mar 25, 2008, at 12:58 PM, Justin Lilly wrote:
>
> > I update it every time I'm reminded of it (I just updated), at the
> > end of a sprint or when I get errors (in hopes it was a bug that was
> > fixed).
>
> >  -justin
>
> > On Tue, Mar 25, 2008 at 12:50 PM, jmDesktop
> > <[EMAIL PROTECTED]> wrote:
>
> > How often do you use svn to get the latest django and update your
> > implementation?  I'm new to all of this and never have used cvs or svn
> > and am trying to figure out the best way to use it.
>
> > --
> > Justin Lilly
> > Web Developer/Designer
> >http://justinlilly.com
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How to do background processing with Django

[shabda]

I response to some urls, my views need to start some potentially time
taking actions. So how can I start background process, would it be as
simple as

...
t = threading.Thread(...)
t.setDaemon(True)
t.start()
return HttpResponse(..)

Or does django/apache have limitation on how threading can be used?
Would my thread be killed, once the response is sent back?

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Object paginator deprecated?

[shabda]

What are he new capbilities of the new paginator? Is there some wiki
page tracking the deprications, like the backwardsincompatible changes?
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Re: Should not select related be default?

[shabda]

Ah, but practicality beats purity :)

But of course I have not fully profiled, the times so might be not
select_related as default is a good idea.

On Mar 24, 5:40 pm, "Tom Badran" <[EMAIL PROTECTED]> wrote:
> On Mon, Mar 24, 2008 at 11:03 AM, shabda <[EMAIL PROTECTED]> wrote:
>
> > In most of my pages, select_related dramatically reduces the number of
> > queries the page is needing, so I was wondering what is the reason
> > behind not making select_related default and providing a method for
> > do_not_select_related
>
> Explicit is better than implicit
>
> Try an "import this" on a python shell.
>
> Tom
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Should not select related be default?

[shabda]

In most of my pages, select_related dramatically reduces the number of
queries the page is needing, so I was wondering what is the reason
behind not making select_related default and providing a method for
do_not_select_related
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Re: Easy PDF generation using PISA HTML2PDF

[shabda]

I have used html2pdf in the past and it is awfully easy! In one of my
apps, I had a requirement that each page be also available as pdf.
so

def view_func(self):
   ..normal processing
  if request.GET.has_key('pdf'):
#Get the pdf template
html = StringIO.StringIO(template.render(Context(payload)))
result = StringIO.StringIO()
pdf = pisa.CreatePDF(html, result)
return HttpResponse(result.getvalue(), mimetype='application/
pdf')

On Mar 24, 2:25 am, coulix <[EMAIL PROTECTED]> wrote:
> Thanks !
> Easier than reportlab :)
> Greg
>
> On Mar 23, 7:37 pm, "[EMAIL PROTECTED]"
>
> <[EMAIL PROTECTED]> wrote:
> > Hi,
>
> > I updated pisa which now includes a complete Django example.
>
> >http://pypi.python.org/pypi/pisa/3.0.17
>
> > Enjoy it.
> > Dirk
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Appending a variable to the query string for the current URL

[shabda]

On each of my pages I want to show a link, which outputs the current
page in pdf. To do so I want to append ?pdf=1 or =1 to the current
url. I do so using the code

if request.META['QUERY_STRING']:
pdfpath = '%s=1' % request.get_full_path()
else:
pdfpath = '%s?pdf=1'% request.get_full_path()

and  in the template. Is there a simpler way?
(Some template tag maybe?)
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Re: How to get unclean data from newform?

[shabda]

Even after reading those two links I can not figure out the answer to
my question. :(

Brot wrote:
> Hello,
>
> http://www.b-list.org/weblog/2007/nov/22/newforms/
> http://blog.michaeltrier.com/2007/11/23/getting-started-with-newforms
>
>   Bernd
>
> On 26 Feb., 07:28, shabda <[EMAIL PROTECTED]> wrote:
> > I have a newform form. It has data bound to it. But it may be invalid.
> > I want to get the data bound to each of its field. How can I do this?
> > I can not use form.cleaned_data because that would work only when the
> > form was valid. If I try
> > for name, value in form.fields.iteritems():
> >print name, value
> >
> > This prints ,  while I want the
> > values.
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How to get unclean data from newform?

[shabda]

I have a newform form. It has data bound to it. But it may be invalid.
I want to get the data bound to each of its field. How can I do this?
I can not use form.cleaned_data because that would work only when the
form was valid. If I try
for name, value in form.fields.iteritems():
   print name, value

This prints ,  while I want the
values.

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Re: Django Filebrowser with FastCGI

[shabda]

I think, In a lot of old code, _ was automatically imported as
ugettext, while the newer code explicitly imports it as
from django.utils.translation import ugettext_lazy as _
Might be when you are running fastcgi, you are hitting some path
where, _ is not imported, while under mod_python, you are hitting
paths where they are defined.

(All this is just a guess.)

On Feb 24, 3:35 pm, patrickk <[EMAIL PROTECTED]> wrote:
> hi stephane,
>
> i´ve never used the filebrowser with fastcgi. not sure whether this is
> a django or a filebrowser-issue.
> maybe someone with more experience using fastcgi has an idea ...
>
> patrick
>
> On Feb 23, 3:12 pm, Rufman <[EMAIL PROTECTED]> wrote:
>
> > Hey Guys
>
> > I'm using the django filebrowser (http://code.google.com/p/django-
> > filebrowser/) for my django site. When I run it on my local server
> > using Apache and mod_python I don't have any problems. But when I
> > attempt to use the filebrowser through fastcgi I get the error global
> > ' _' not defined. I'm relatively new to django and python, but I found
> > out that the variable '_' holds the last not None result (in the
> > python interactive interpreter).
>
> > Any help/ideas are welcome ...thanks
>
> > Stephane
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Re: File uploads with django - memory usage questions

[shabda]

Read that patch, but considering that this has not been merged, I
think are soem known issues with this patch. Reading it, I cant figure
out, what the pros, cons are. Any help?
Suppose I do not apply this patch, the is there some way to specify
that django not accept any file above a fixed size. Or should this
setting be specified somewhere in apache config?

On Feb 24, 3:46 am, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
wrote:
> There is a ticket related to this:http://code.djangoproject.com/ticket/2070
> there is a patch that based on the comments should work.
>
> On Feb 23, 2:48 pm, shabda <[EMAIL PROTECTED]> wrote:
>
> > I have a form which allows users to upload files.
>
> > The form is,
> > class AddFileForm(forms.Form):
> > """Add a file."""
> > filename = forms.FileField()
>
> > I am using S3 to store files, my view is something like,
>
> > if request.method == 'POST':
> > addfileform = bforms.AddFileForm(request.POST, request.FILES)
> > if addfileform.is_valid():
> > conn = S3.AWSAuthConnection(secrets.aws_id,
> > secrets.aws_key)
> > filename = '/%s/%s' % (project,
> > addfileform.cleaned_data['filename'].filename)
> > response = conn.put(bucket, filename,
> > addfileform.cleaned_data['filename'].content)
>
> > So my question is would using a call like
> > addfileform.cleaned_data['filename'].content in my view mean that if
> > an user uploads a 100 MB file, the server would have that data in
> > memory? What can I do to counter this?
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File uploads with django - memory usage questions

[shabda]

I have a form which allows users to upload files.

The form is,
class AddFileForm(forms.Form):
"""Add a file."""
filename = forms.FileField()

I am using S3 to store files, my view is something like,

if request.method == 'POST':
addfileform = bforms.AddFileForm(request.POST, request.FILES)
if addfileform.is_valid():
conn = S3.AWSAuthConnection(secrets.aws_id,
secrets.aws_key)
filename = '/%s/%s' % (project,
addfileform.cleaned_data['filename'].filename)
response = conn.put(bucket, filename,
addfileform.cleaned_data['filename'].content)

So my question is would using a call like
addfileform.cleaned_data['filename'].content in my view mean that if
an user uploads a 100 MB file, the server would have that data in
memory? What can I do to counter this?
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Re: django.test.client.Client returns HttpResponse/ How to make the test client follow 302 status codes?

[shabda]

Please ignore the previous message. I think I am too sleepy now, and
am seeing things which do not exist. :) .

On Feb 22, 11:57 pm, shabda <[EMAIL PROTECTED]> wrote:
> Aww, I seems a call to c.get('/dashboard/') gets an object of type
> HttpResponse while c.get('/dashboard/', {}) gets a Response object.
>
> On Feb 22, 11:50 pm, shabda <[EMAIL PROTECTED]> wrote:
>
> > I have some test code written like,
>
> > def testDashBoard(self):
> > c = Client()
> >     print c.login(username = 'Shabda', password= 'shabda')
> > response = c.get('/dashboard/')
> > print response.headers['X-View']
>
> > This is giving me error
>
> > ==
> > ERROR: testDashBoard (prajact.project.tests.TestUrls)
> > --
> > Traceback (most recent call last):
> >   File "G:\prajact\project\tests.py", line 822, in testDashBoard
> > print response.headers['X-View']
> > AttributeError: 'HttpResponse' object has no attribute 'headers'
>
> > But according to the documentation c.get must return objects of type
> > reponse, and not HttpReponse. What am I doing wrong?
>
> > Also I want the test client to follow the HttpReponseRedirects, so
> > that I can see the actual view which the user will see, but the test
> > client does not do this by default. How can I do this?
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Re: django.test.client.Client returns HttpResponse/ How to make the test client follow 302 status codes?

[shabda]

Aww, I seems a call to c.get('/dashboard/') gets an object of type
HttpResponse while c.get('/dashboard/', {}) gets a Response object.

On Feb 22, 11:50 pm, shabda <[EMAIL PROTECTED]> wrote:
> I have some test code written like,
>
> def testDashBoard(self):
> c = Client()
> print c.login(username = 'Shabda', password= 'shabda')
> response = c.get('/dashboard/')
> print response.headers['X-View']
>
> This is giving me error
>
> ==
> ERROR: testDashBoard (prajact.project.tests.TestUrls)
> --
> Traceback (most recent call last):
>   File "G:\prajact\project\tests.py", line 822, in testDashBoard
> print response.headers['X-View']
> AttributeError: 'HttpResponse' object has no attribute 'headers'
>
> But according to the documentation c.get must return objects of type
> reponse, and not HttpReponse. What am I doing wrong?
>
> Also I want the test client to follow the HttpReponseRedirects, so
> that I can see the actual view which the user will see, but the test
> client does not do this by default. How can I do this?
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django.test.client.Client returns HttpResponse/ How to make the test client follow 302 status codes?

[shabda]

I have some test code written like,

def testDashBoard(self):
c = Client()
print c.login(username = 'Shabda', password= 'shabda')
response = c.get('/dashboard/')
print response.headers['X-View']

This is giving me error

==
ERROR: testDashBoard (prajact.project.tests.TestUrls)
--
Traceback (most recent call last):
  File "G:\prajact\project\tests.py", line 822, in testDashBoard
print response.headers['X-View']
AttributeError: 'HttpResponse' object has no attribute 'headers'

But according to the documentation c.get must return objects of type
reponse, and not HttpReponse. What am I doing wrong?

Also I want the test client to follow the HttpReponseRedirects, so
that I can see the actual view which the user will see, but the test
client does not do this by default. How can I do this?
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How to use pychecker with Django

[shabda]

I want to use pychecker to do static analysis on my code. So I set up
DJAGO_SETTINGS_MODULE and run pychecker from shell. I am getting
exceptions like,

G:\prajact>pychecker project\urls.py

G:\prajact>C:\Python24\python.exe C:\Python24\Lib\site-packages
\pychecker\checker.py project\urls.py
Processing urls...
  Caught exception importing module urls:
File "C:\Python24\Lib\site-packages\pychecker\checker.py", line
621, in setupMainCode()
  module = imp.load_module(self.moduleName, file, filename, smt)
File "G:\prajact\..\prajact\project\urls.py", line 4
  from rss import *
File "G:\prajact\..\prajact\project\rss.py", line 4
  from helpers import *
File "G:\prajact\..\prajact\project\helpers.py", line 8
  from models import *
File "G:\prajact\project\models.py", line 41
  class Project(models.Model):
File "C:\Python24\lib\site-packages\django\db\models\base.py",
line 53, in __new__()
  new_class._meta.app_label = model_module.__name__.split('.')[-2]
  IndexError: list index out of range

Warnings...

urls:1: NOT PROCESSED UNABLE TO IMPORT

The checker runs fine on non Django code. It seems that some of the
model metaclass magic clashes with pychecker.
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Re: How to stop validations duplications in forms and models?

[shabda]

>(the save() method shouldn't raise
>any validation errors except those triggered by the database server due
>to IntegrityErrors).

So what is the recommended place to write validations in models, for
now?

On Feb 22, 12:25 am, Malcolm Tredinnick <[EMAIL PROTECTED]>
wrote:
> On Thu, 2008-02-21 at 08:54 -0800,shabdawrote:
> > I have some models, and some forms to write data to them. The
> > attributes in models need to have soem validations, (For example, name
> > must be alpha numeric, price must be less that 1000 etc). SO I write
> > the validations in model.save() and raise Exceptions, when a
> > validation fails. I also need to write the same validations in
> > newforms as I do not want the form post to happen unless the
> > validation passes. This means that I have the same validation at two
> > places. (I can't raise ValidationException from models).  Is there a
> > way to remove this duplication?
>
> Some current work-in-progress is model-aware validation. This will
> provide a validate() method on models (the save() method shouldn't raise
> any validation errors except those triggered by the database server due
> to IntegrityErrors). At the same time, this means forms created directly
> from models will use the models' validation functions to validate the
> fields. Finally, the validation functions will be able to be used mostly
> identically for form fields and model fields.
>
> So, it's coming. Just wait a little longer.
>
> Malcolm
>
> --
> Always try to be modest and be proud of it!http://www.pointy-stick.com/blog/
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Re: Converting relational data to hiechical data

[shabda]

That would help once I get the relational data to a hierarchical list,
and that is the difficult part!

On Feb 21, 10:59 pm, Brian Luft <[EMAIL PROTECTED]> wrote:
> http://www.djangoproject.com/documentation/templates/#unordered-list
>
> On Feb 21, 4:22 am, shabda <[EMAIL PROTECTED]> wrote:
>
> > I have a model like
>
> > class Task(models.Model):
> >   name = Models.CharField(max_length = 100)
> >   parent = models.ForeignKey('Task', null = True)
>
> > Using this model say I have got a table like,
>
> > Task
> > ---
> > ID  Name Parent_id
> > 1   Foo null
> > 2  Bar   1
> > 3 Baz1
> > 4 Bax2
>
> > I want to display this information hierchically in the template,
> > something like
>
> > 
> >  Foo 
> > 
> >Bar
> > Bax 
> >Baz 
> > 
> > 
>
> > Essentially I want to convert a relational data to monarchical data.
> > Does any body have snippets/recipe to do something similar? I am using
> > mySQL
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Re: Evaluating/stepping through sliced QuerySets

[shabda]

There is a threaded comments app 
http://code.google.com/p/django-threadedcomments/
, Now that I think about it, they surely would be doing this
conversion from relational to hierarchical format. I will read the
code and let you know if I can find something useful.

On Feb 20, 7:10 pm, Evert Rol <[EMAIL PROTECTED]> wrote:
>Hi folks,
>
> I'm somewhat new to Django, happily plodding along creating apps for
> a website, when I stumbled upon oddities when slicing QuerySets. I'm
> using 0.97pre (checked out from SVN about a month ago) on Mac OS X
> 10.4, Python 2.5.
> With the following very simply class:
>
> class Article(models.Model):
>  text = models.CharField(max_length=100, default='lorem ipsum')
>  def __unicode__(self):
>  return self.text
>
> I can do the following:
>  >>> from dtest.models import Article
>  >>> for x  in range(1, 5):
> ... a = Article(text='article no %d' % x)
> ... a.save()
> ...
>  >>> articles = Article.objects.all()
>  >>> for a in articles:
> ... print a
> ...
> article no 1
> article no 2
> article no 3
> article no 4
>
> That all works fine. Things get weird when I slice the QuerySet (I'm
> using the id-ing and type-ing to check on the object):
>  >>> selection = Article.objects.all()[0:3]
>  >>> print id(selection), type(selection)
> 20614928 
>  >>> for a in selection:
> ... print a
> ...
> article no 1
> article no 2
> article no 3
>
>  >>> selection = Article.objects.all()[0:3]
>  >>> print id(selection), type(selection)
> 20627632 
>  >>> for i in range(4):
> ... print selection[i]
> ...
> article no 1
> article no 2
> article no 3
> article no 4
>
> ???
> This is what I didn't expect: where's the IndexError (or
> ObjectNotFound)?
>
> But if I evaluate the selection before (using len(), to minimize
> output; print also works, for example), it does work as I expect:
>  >>> selection = Article.objects.all()[0:3]
>  >>> print id(selection), type(selection)
> 20615056 
>  >>> len(selection)
> 3
>  >>> print id(selection), type(selection)
> 20615056 
>  >>> for i in range(4):
> ... print selection[i]
> ...
> article no 1
> article no 2
> article no 3
> Traceback (most recent call last):
>File "", line 2, in 
>File "/sw/lib/python2.5/site-packages/django/db/models/query.py",
> line 161, in __getitem__
>  return self._result_cache[k]
> IndexError: list index out of range
>
> It obviously has to do with how and when QuerySets are evaluated; it
> looks like that before evaluation, the slice hasn't 'worked' yet. The
> id() and type() statements suggest it's still completely the same
> object though, before and after; nothing has apparently changed.
> (In fact, this is the reason I'm not recycling the first articles or
> selection QuerySet, but instead do an objects.all() each time; it
> gets evaluated in the first for-loop, and when recycled, things work
> as I expect).
> I found a few threads on the mailing list on this, bit I'm not sure
> if they explain this behaviour to me (threads referenced below).
> Could someone point me in the right direction/documentation on this,
> or just change how my mind works (nothing too drastically, please).
> Do I really need to evaluate the selection beforehand?
> Obviously, the example above is simplistic and should be done
> differently, but I do have a situation where I'd like to be able to
> index a sliced QueyrSet step by step, instead of iterating through
> it. Or, what possibly could also solve my problem: can I iterate
> through a (sliced) QuerySet step by step, by eg calling something
> like a next() method each time I needed the next element? (I've
> tried, but there's no next() method on QuerySets apparently).
>
> Thanks a lot,
>
>Evert
>
> http://groups.google.com/group/django-users/browse_thread/thread/
> aef03c62f655fe45/a6ce6074ceab7438?lnk=gst=queryset
> +slicing#a6ce6074ceab7438http://groups.google.com/group/django-users/browse_thread/thread/
> 3b98ffd38969c49a/a56354e0c0e61a9a?lnk=gst=queryset
> +slicing#a56354e0c0e61a9a
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How to stop validations duplications in forms and models?

[shabda]

I have some models, and some forms to write data to them. The
attributes in models need to have soem validations, (For example, name
must be alpha numeric, price must be less that 1000 etc). SO I write
the validations in model.save() and raise Exceptions, when a
validation fails. I also need to write the same validations in
newforms as I do not want the form post to happen unless the
validation passes. This means that I have the same validation at two
places. (I can't raise ValidationException from models).  Is there a
way to remove this duplication?
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Converting relational data to hiechical data

[shabda]

I have a model like

class Task(models.Model):
  name = Models.CharField(max_length = 100)
  parent = models.ForeignKey('Task', null = True)

Using this model say I have got a table like,

Task
---
ID  Name Parent_id
1   Foo null
2  Bar   1
3 Baz1
4 Bax2

I want to display this information hierchically in the template,
something like


 Foo 

   Bar
Bax 
   Baz 



Essentially I want to convert a relational data to monarchical data.
Does any body have snippets/recipe to do something similar? I am using
mySQL


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How to use filefield, and specify custom, dynamic upload_to

[shabda]

I have  a model like

class File(models.Model):
  file = models.FileField(upload_to = 'files')
  project = models.ForeignKey(Project)

class Project(models.Model):
  name = models.CharField(max_length = 100)

I want to have each file go a specific directory corresponding to its
project_name
So I want to do something like,

class File(models.Model):
  file = models.FileField(upload_to = project.name)
  project = models.ForeignKey(Project)

But of course this won work, as until the metaclass magic happens and
I have an object project dos not have the name attribute. So how can I
achieve this.

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Re: Setting request.GET when sending an HttpResponse

[shabda]

Umm, if you want to persist state across HTTP requests, why not use
session?

On Feb 14, 2:28 pm, mario <[EMAIL PROTECTED]> wrote:
> Etienne, thanks for answering,
>
> > I believe you got this wrong a little. A HttpResponse object doesn't modify
> > the query string. That should be done in your form markup,
> > or even in a javascript file, in case you want to do it programmatically.
>
> Yes, I understand that a HttpResponse cannot modify the query string.
> What I really want is a behavior, which looks like modifying the query
> string, but in fact is a common submit/response practice that I do not
> know how to implement. This is what I need:
> - user enters a query form (through a 1st GET request),
> - user selects some filtering options (e.g. combo, check box) and then
> presses the submit button (thus I receive a POST request)
> - system sends an HTTP response with the query result and the same
> filtering options set by the user. However, I wish that the same
> filtering options set by the user (that I received through a POST), do
> also appear in the query string.
>
> Is there any way to do that? Or I'm completely wrong on what I'm
> trying to do?
>
> I carefully read the Django "Request and response objects" docs, but I
> can't find a strightforward way to get this behavior done. If you know
> of any example or code snippet for such behavior, please let me know.
>
> On 13 Feb, 22:40, "Etienne Robillard" <[EMAIL PROTECTED]>
> wrote:
>
> > I'll try to help ya a little...
>
> > > I receive a request via GET and, based on request.GET, I generare a
> > > result and send a HttpResponse. However, when sending the response,
> > > I'd like to set additional parameters in the query string.
>
> > > For example, suppose I receive the following request:
>
> > >  http://domain.com/myurl/myform/?query=whatever
>
> > I believe you got this wrong a little. A HttpResponse object doesn't modify
> > the query string. That should be done in your form markup,
> > or even in a javascript file, in case you want to do it programmatically.
>
> > > Then, my form will query the database, build the result set and send a
> > > initial HTTP response. Then the user will (for example) toggle a
> > > "order by" option. Now, what I would like is to return a HttpResponse
> > > but ALSO, extend the query string, for example
>
> > >  http://domain.com/myurl/myform/?query=whatever=foo
>
> > > so that on the next request.GET I find the new "orderby" parameter.
>
> > Nothing prevent's you to use another view which could then handle
> > this new POSTed parameter.
>
> > > This seems a tremendously common and simple problem. However, I'm not
> > > finding a way to solve it. If I use a HttpResponseRedirect instead of
> > > an HttpResponse, what I get is a "Found a cyclic link" problem.
>
> > > Any suggestion?
>
> > I suggest you 
> > read:http://www.djangoproject.com/documentation/request_response/
>
> > Regards,
> > Etienne
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Newfroms - How to get the id for a field

[shabda]

When using newforms, I want to get the id set on the input field.
I am doing something like,
{% for field in form %}
{{ field }}
...

Now this {{field}} will render as something like,


Withing the template how can I access the value for id. If this is not
possible where in code does Django set the value for id? (It seems to
me to be newforms.form.BaseField.as_widget, I just can't figure out
how! )
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Raising exception when a template objects is not present or raise s exception.

[shabda]

I want my template to raise exception, when an object is not preset or
raises a exception. I am sure there is a setting for it, I just cant
figure out where. Help?
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Re: Creating password protected RSS feeds

[shabda]

This seems very useful! Is there some way I can wrap my rss feed
within a view function?

My feeds class looks like,

class ProjectRss(Feed):
def get_object(self, bits):


I am using the django.contrib.syndication.feeds.

Michael Elsdörfer wrote:
> > How can I create passwords protected feeds with Django? I guess I
>  > will have to go beyond the contrib.feeds framework, but if some one
>  > has any recipes/links to how to do this, it would be most helpful!
>
> Use your own custom view to render the feed, and just wrap HTTP auth
> around it. There are some snippets around implementing it, for example:
>
> http://www.djangosnippets.org/snippets/243/
>
> Michael
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Creating password protected RSS feeds

[shabda]

How can I create passwords protected feeds with Django? I guess I will
have to go beyond the contrib.feeds framework, but if some one has any
recipes/links to how to do this, it would be most helpful!
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