Re: Any good books for learning django?

[Lachlan Musicman]

Ah, PyDanny and Audrey's Two Scoops is a great primer once you've done
the excellent tutorial that is on the Django site

https://django.2scoops.org/

I'm a very happy owner.

L.

On 27 July 2013 12:43, Yinka  wrote:
> Is there any hope that we'll ever get an up-to-date book for learning
> Django?
>
> Rails 4 was released only last month and I can count at least 4 books (at
> various stages of completion) on sale to guide beginners.
>
> I love Django and but it's been difficult having to depend ONLY on the
> documentation to learn, don't get me wrong - the docs tutorial is good but
> is just not the right 'book' for beginners.
>
> Thank you.
>
>
> On Thursday, February 7, 2013 5:49:36 PM UTC, frocco wrote:
>>
>> Hello,
>> Most of what I find are dated, 2008,2009.
>> Are these still good for learning django 1.4?
>>
>> Which books do you recommend?
>>
>> Thanks
>
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-- 
We are like a drunk blundering through a crowd of pickpockets. That we
are not poor and naked already is a testament to either the goodness
of humanity or the ineptitude of the criminal class.

http://techcrunch.com/2013/06/08/we-asked-for-this/

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Re: Any good books for learning django?

[Yinka]

Is there any hope that we'll ever get an up-to-date book for learning 
Django?

Rails 4 was released only last month and I can count at least 4 books (at 
various stages of completion) on sale to guide beginners.

I love Django and but it's been difficult having to depend ONLY on the 
documentation to learn, don't get me wrong - the docs tutorial is good but 
is just not the right 'book' for beginners.

Thank you.
 

On Thursday, February 7, 2013 5:49:36 PM UTC, frocco wrote:
>
> Hello,
> Most of what I find are dated, 2008,2009.
> Are these still good for learning django 1.4?
>
> Which books do you recommend?
>
> Thanks
>

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Changing log filename

[David Kumar]

I have a standard logger that I would like to use for all of my 
applications, the only thing I want to change is the name of the file.  Is 
there a way to do that with out having to create a logger and handler for 
each of my apps.

Here is the logging settings that I am using.

LOGGING = {
'version': 1,
'disable_existing_loggers': True,
'formatters': {
'standard': {
'format' : "[%(asctime)s] %(levelname)s [%(module)s:%(lineno)s] 
%(message)s",
'datefmt' : "%d/%b/%Y %H:%M:%S"
},
},
'handlers': {
'app_logger': {
'level':'DEBUG',
'class':'logging.handlers.TimedRotatingFileHandler',
'filename': '/var/log/django/app.log',
'backupCount': 5,
'when' : 'midnight',
'formatter': 'standard',
},
},
'loggers': {
'myproject': {
'handlers': ['app_logger'],
'level': 'INFO',
}
}
}


In my app I would like to be able to override the 'filename': 
'/var/log/django/another_app.log',

import logging
log = logging.getLogger('myproject')


log.info("Something here")

Any ideas?

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Re: Advanced Tutorial (how to write reusable app), last step does not work

[Mike Dewhirst]

On 27/07/2013 10:20am, Cate Liu wrote:


I am a new newbie to Django.  Great tutorial BTW.  I followed it to the
T and 99.9% worked.
Except the last step in the Advanced tutorial, the step 3 in 'Using your
own package'.
I could see http://127.0.0.1:8000/admin/ and create polls without any
problem.
But http://127.0.0.1:8000/polls/ would give me the following error.

I see there are two problems.
1. |/Users/nnn/django_exercises/mysite/templates/polls/index.html is the
wrong location, it should be
$$/django_polls/polls/templates/polls/index.html.
2. What is ||polls/poll_list.html?|  Nowhere in the tutorial ever
created this file, no?


I don't know the tutorial and haven't looked through it but you have 
definitely called for poll_list.html somewhere in your code.


The first place to look is in your urls.py. Try and see how the URL you 
entered is being interpreted. It is probably calling a view (in 
views.py?) which names poll_list.html directly.


I put print statements in my settings.py if DEBUG == True which show my 
static, media and template locations every time I use manage.py 
runserver. It is very helpful when debugging file locations.


You might also try http://127.0.0.1:8000/admin/polls/



Thanks for any advice.


--


  TemplateDoesNotExist at /polls/

polls/index.html, polls/poll_list.html

Request Method: GET
Request URL:http://127.0.0.1:8000/polls/
Django Version: 1.5.1
Exception Type: TemplateDoesNotExist
Exception Value:

polls/index.html, polls/poll_list.html

Exception Location:
/Library/Python/2.7/site-packages/django/template/loader.py in
select_template, line 194
Python Executable:  /usr/bin/python
Python Version: 2.7.2
Python Path:

['/Users/nnn/django_exercises/mysite',
  '/Users/nnn/py_pkg/lib/python/django_polls-0.1-py2.7.egg',
  '/Users/nnn/py_pkg/lib/python',
  '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip',
  '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
  
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
  
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
  
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
  '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python',
  
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
  
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old',
  
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload',
  
'/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC',
  '/Library/Python/2.7/site-packages']

Server time:Fri, 26 Jul 2013 16:59:14 -0700



Template-loader postmortem

Django tried loading these templates, in this order:

  * Using loader |django.template.loaders.filesystem.Loader|:
  o |/Users/nnn/django_exercises/mysite/templates/polls/index.html,
polls/poll_list.html| (File does not exist)
  * Using loader |django.template.loaders.app_directories.Loader|:
  o 
|/Library/Python/2.7/site-packages/django/contrib/auth/templates/polls/index.html,
polls/poll_list.html| (File does not exist)
  o 
|/Library/Python/2.7/site-packages/django/contrib/admin/templates/polls/index.html,
polls/poll_list.html| (File does not exist)


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Re: Django 1.5 Feature Suggestion

[Russell Keith-Magee]

On Fri, Jul 26, 2013 at 10:43 PM, JJ Zolper  wrote:

> Hello everyone,
>
> So I want to say thanks to the Django guys for providing more support for
> those of us that want to use a user's email as the UID and login handler
> versus the previous method of handling based on the username. I and
> probably many others appreciate the effort given to the topic and that it
> was integrated into Django 1.5.
>
> Today I would like to request a continuing expansion about this concept.
>
> In referencing this link:
>
>
> https://geekwentfreak-raviteja.rhcloud.com/2012/12/custom-user-models-in-django-1-5/
>
> I would like to request that if we want to make email the UID we don't
> have to do things such as:
>
> class MyUser(AbstractBaseUser, PermissionsMixin):
> 
> is_staff = models.BooleanField('staff status', default=False,
> help_text='Designates whether the user can log into this admin '
> 'site.')
> is_active = models.BooleanField('active', default=True,
> help_text='Designates whether this user should be treated as '
> 'active. Unselect this instead of deleting accounts.')
>
> def get_full_name(self):
> full_name = '%s %s' % (self.first_name, self.last_name)
> return full_name.strip()
>
> def get_short_name(self):
> return self.first_name
>
> just to retain what could already be apart of Django. You guys know more
> about Django then I ever will and what the best way is to go about it but
> if we can eliminate additional code that is already in Django that would be
> wonderful.
>
> Now in referencing:
>
>
> http://stackoverflow.com/questions/16638414/set-email-as-username-in-django-1-5
>
> Basically what I'm saying is, we shouldn't have to do what this fellow had
> to do:
>
> Unfortunately there's nothing within django.contrib.auth that you can
> simply subclass to get a model that has
>
>1.
>
>email address in place of user name and
>2.
>
>works nicely with other django.contrib.auth-stuff, like groups.
>
> The simplest approach is to copy models.py, admin.py and forms.py from
> django.contrib.auth, rip out user name all over the place and put in
> email address in it's place. I've done just that and I'm using it
> successfully in a couple of client projects.
>
> I've put it up on github and pypi so you can install it with
>
> pip install django-libtech-emailuser
>
>
> I thank you for your time and I appreciate your consideration for
> integrating this once and for all into Django.
>

Hi JJ,

That's a fair comment -- "Email address as username" is a sufficiently
common use case that it probably warrants being included in Django's core.
I think I've overheard Jacob endorsing the same thing at some point in the
past (although I'll stand corrected on this if I
misheard/misunderstood/misattributed his comments).

If you've already done the heavy lifting here, then all we need to do is
massage your external package into contrib. Open a ticket and we can see
what we can do about getting this in for 1.7.

Yours,
Russ Magee %-)

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Re: error

[Mike Dewhirst]

On 27/07/2013 5:10am, veda av wrote:

manage.py not recognized as an internal or external command
why do we get this error


manage.py isn't there. Or if it is there it isn't on the path. Did you 
cut any corners during installation?




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Re: Django documentation code ?

[Mike Dewhirst]

On 27/07/2013 3:37am, Vinod Halaharvi wrote:

Is there a way to download just the code examples listed in the Django
documentation pages ?


That's not necessarily a good idea but it depends what you want to do..

Why do you want to do that?

It wouldn't be too difficult to write a little screen scraper using requests

http://docs.python-requests.org/en/latest/




VH

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error

[veda av]

manage.py not recognized as an internal or external command
why do we get this error 

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Advanced Tutorial (how to write reusable app), last step does not work

[Cate Liu]

I am a new newbie to Django.  Great tutorial BTW.  I followed it to the T 
and 99.9% worked.
Except the last step in the Advanced tutorial, the step 3 in 'Using your 
own package'.
I could see http://127.0.0.1:8000/admin/ and create polls without any 
problem.
But http://127.0.0.1:8000/polls/ would give me the following error.

I see there are two problems.
1. /Users/nnn/django_exercises/mysite/templates/polls/index.html is the 
wrong location, it should be 
$$/django_polls/polls/templates/polls/index.html.
2. What is polls/poll_list.html?  Nowhere in the tutorial ever created this 
file, no?

Thanks for any advice.


--
TemplateDoesNotExist at /polls/ 

polls/index.html, polls/poll_list.html

 Request Method: GET  Request URL: http://127.0.0.1:8000/polls/  Django 
Version: 1.5.1  Exception Type: TemplateDoesNotExist  Exception Value: 

polls/index.html, polls/poll_list.html

 Exception Location: 
/Library/Python/2.7/site-packages/django/template/loader.py 
in select_template, line 194  Python Executable: /usr/bin/python  Python 
Version: 2.7.2  Python Path: 

['/Users/nnn/django_exercises/mysite',
 '/Users/nnn/py_pkg/lib/python/django_polls-0.1-py2.7.egg',
 '/Users/nnn/py_pkg/lib/python',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
 
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
 
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
 
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python',
 
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
 
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old',
 
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload',
 
'/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC',
 '/Library/Python/2.7/site-packages']

 Server time: Fri, 26 Jul 2013 16:59:14 -0700

Template-loader postmortem 

Django tried loading these templates, in this order:

   - Using loader django.template.loaders.filesystem.Loader: 
  - /Users/nnn/django_exercises/mysite/templates/polls/index.html, 
  polls/poll_list.html (File does not exist)
   - Using loader django.template.loaders.app_directories.Loader: 
  - 
/Library/Python/2.7/site-packages/django/contrib/auth/templates/polls/index.html,
 
  polls/poll_list.html (File does not exist)
  - 
/Library/Python/2.7/site-packages/django/contrib/admin/templates/polls/index.html,
 
  polls/poll_list.html (File does not exist)
   

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Forms with fields created dynamically client side

[Jon Dufresne]

Hi,

I am creating a form for the user to add, edit, and remove all tags in the
database. The tag models are handled by taggit. The form will look like like

_Tag1_[del]
_Tag2_[del]
__<--- User enters next tag here

[add tag]

Clicking add tag will fire some javascript to add a new text input to the
form. I trying to create this form in Django to handle the request. This is
what I have so far. I am curious if I am going about this the right way. It
all seems very... roundabout. Thoughts? One part that bothers me is I must
inspect the incoming data to decide how many form elements to create.

Coming from PHP, I would create form names with array notation (tags[pk] =
name) and iterate over the array during the request.

The existing_tag dictionary allows me to map form names to tag objects. The
new_tags list allows me to iterate over tag fields that must be created as
new tags.

class TagsForm(forms.Form):
def __init__(self, data=None, *args, **kwargs):
super(TagsForm, self).__init__(data, *args, **kwargs)

self.existing_tags = {}
self.new_tags = []

for tag in Tag.objects.all():
name = 'tag%i' % tag.pk
self.fields[name] = forms.CharField(
initial=tag.name,
required=False)
self.existing_tags[name] = tag

if data:
for name in data:
if name.startswith('newtags'):
self.fields[name] = forms.CharField(required=False)
self.new_tags.append(name)
else:
name = 'newtags'
self.fields[name] = forms.CharField(required=False)
self.new_tags.append(name)

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Re: .filter() and .exclude() don't add up

[Steve McConville]

> So, if one of the fields can be Null, then *neither*:
>
> queryset.filter(field=value)
>
> queryset.exclude(field=value)
>
> will match a record where it's Null?

As I understand it, this is correct - it's certainly the way SQL was designed.

> In that case, is there a better - more reliable - way than using both 
> .filter() and .exclude() with the same terms to split a queryset into all 
> those items that match a filter, and all those that don't?

As well as doing the queries above, you can get the nulls by doing

queryset.filter(field__isnull=True)

and then it's just a matter of deciding which of your two sets the
nulls should be included in (probably with a logical OR). There are a
number of other approaches as well, but somewhere we'll still have to
decide what the meaning of null. My bias is towards making that
explicit. The other obvious approach is to find queryset.all() and
then the (null-less) set queryset.filter(field=value) and work with
them.

-- 
steve
http://stevemcconville.com/

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Re: .filter() and .exclude() don't add up

[Bill Freeman]

You really should figure out which record isn't showing up in either sub
case and look at it in detail to see if NULLs are involved before you spend
time trying to fix a problem that you don't have.

You could, for example collect all the ids from the several queries into
python sets, union the sub queries, and take the difference of that from
the total query.


On Fri, Jul 26, 2013 at 5:28 PM, Daniele Procida  wrote:

> On Fri, Jul 26, 2013, Steve McConville  wrote:
>
> >Firstly (and I don't think this is the cause of the problem) you're
> >calling datetime.now() four times, which will give you four different
> >datetimes (ie. the queries will not be completely identical).
>
> Good point, I will address that.
>
> > Secondly
> >SQL uses a 3-valued logic (with null) so if any of the fields you're
> >filtering on are nullable you may not be able to rely on the law of
> >the excluded middle
>
> So, if one of the fields can be Null, then *neither*:
>
> queryset.filter(field=value)
>
> queryset.exclude(field=value)
>
> will match a record where it's Null?
>
> In that case, is there a better - more reliable - way than using both
> .filter() and .exclude() with the same terms to split a queryset into all
> those items that match a filter, and all those that don't?
>
> Thanks,
>
> Daniele
>
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>
>
>

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Re: .filter() and .exclude() don't add up

[Daniele Procida]

On Fri, Jul 26, 2013, Steve McConville  wrote:

>Firstly (and I don't think this is the cause of the problem) you're
>calling datetime.now() four times, which will give you four different
>datetimes (ie. the queries will not be completely identical).

Good point, I will address that.

> Secondly
>SQL uses a 3-valued logic (with null) so if any of the fields you're
>filtering on are nullable you may not be able to rely on the law of
>the excluded middle

So, if one of the fields can be Null, then *neither*:

queryset.filter(field=value)

queryset.exclude(field=value)

will match a record where it's Null?

In that case, is there a better - more reliable - way than using both .filter() 
and .exclude() with the same terms to split a queryset into all those items 
that match a filter, and all those that don't?

Thanks,

Daniele

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Re: or-ing to QuerySets turns INNER into LEFT OUTER joins?

[Martin J. Laubach]

> This is still about 50 times better than the form with Q objects and 
> LEFT OUTER joins.


  This is rather unusual. A join in the database should be quite a bit 
faster than doing things manually, except if the joined tables produce 
massive amounts of data. This suggests that you're missing useful indexes 
and/or statistics for your query.

mjl

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Django documentation code ?

[Vinod Halaharvi]

Is there a way to download just the code examples listed in the Django 
documentation pages ? 

VH

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Re: tinymce

[Bill Freeman]

See the README at https://github.com/aljosa/django-tinymce


On Fri, Jul 26, 2013 at 2:00 PM, Karl Arunachal <
kakararunachalserv...@gmail.com> wrote:

> Hi,
> I want to integrate tinymce in my text area. But i can't find any good
> tutorials for it. Can some someone please advice me how to do this.
> Thank you.
>
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tinymce

[Karl Arunachal]

Hi,
I want to integrate tinymce in my text area. But i can't find any good
tutorials for it. Can some someone please advice me how to do this.
Thank you.

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Re: .filter() and .exclude() don't add up

[Steve McConville]

Firstly (and I don't think this is the cause of the problem) you're
calling datetime.now() four times, which will give you four different
datetimes (ie. the queries will not be completely identical). Secondly
SQL uses a 3-valued logic (with null) so if any of the fields you're
filtering on are nullable you may not be able to rely on the law of
the excluded middle:

https://en.wikipedia.org/wiki/Null_(SQL)#Law_of_the_excluded_fourth_.28in_WHERE_clauses.29

On 26 July 2013 16:57, Daniele Procida  wrote:
> How is this possible?
>
> # we start with a queryset actual_events
>
> # get forthcoming_events using filter()
>
> forthcoming_events = actual_events.filter(
> Q(single_day_event = True, date__gte = datetime.now()) | \
> Q(single_day_event = False, end_date__gte = datetime.now())
> )
>
> # get previous_events using exclude() and exactly the same terms as above
>
> previous_events = actual_events.exclude(
> Q(single_day_event = True, date__gte = datetime.now()) | \
> Q(single_day_event = False, end_date__gte = datetime.now())
> )
>
> # And now:
>
> # actual_events.count():  467
> # forthcoming_events.count():  24
> # previous_events.count():442
>
> SInce I have run .filter() and .exclude() with identical terms, should they 
> not between them contain all the items in the queryset they acted upon, 
> *whatever* the terms used?
>
> Daniele
>
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-- 
steve
http://stevemcconville.com/

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Re: or-ing to QuerySets turns INNER into LEFT OUTER joins?

[Carsten Fuchs]

Hi Tom,

thank you very much for your detailed reply, it helped at lot!

Am 25.07.2013 19:00, schrieb Tom Evans:

[...]
As an example you can play around with, pick one user who has log
entries, and remove all their departments from STAFF_BEREICHE. This
user should then be found with the slow query with LEFT OUTER joins,
but not with the fast query with INNER joins [...]


Yes, I can reproduce this, and also for the opposite case, where a STAFF 
member has no entries in the related ERFASST table.


And although I've clipped most of your text in the quote above for 
brevity, your text really made me understand the background and 
reasoning, too!  :-D


Now with correctness established, this leaves me with the performance 
problem. The formulation with the OR and the LEFT OUTER joins is indeed 
what we semantically need (also see below, about Erfasst and logging ;) ).


The best that I could think of so far is to run the individual queries 
individually, combine the results in Python code (the "OR" operation), 
then (as we need a QuerySet at this place in the code for further 
filtering) run another query with `.filter(id__in=ManuallyCombinedResults)`:



S_a = set(Staff.objects. \
  filter(bereiche=SomeDep).values_list('id', flat=True))

S_b = set(Staff.objects. \
  filter(erfasst__datum__gte=FirstDay,
 erfasst__datum__lte=LastDay,
 erfasst__bereich=SomeDep).values_list('id', flat=True))

Q_a_or_b = Staff.objects.filter(id__in=S_a | S_b).distinct()


This is still about 50 times better than the form with Q objects and 
LEFT OUTER joins. (Do you see a way to optimize this even further (in 
the Django ORM)?)


My initial assumption was that the OR in the all-in-one query would not 
be much slower than the individual queries, and was really surprised to 
learn otherwise...



* Erfasst is meaning logging here, right? Reaching the limits of my German :)


Translated verbatim, "Erfasst" means "committed" or "recorded" -- which 
obviously is a really stupid name for a database table. Alas, this is 
the legacy that I got when I overtook the original PHP project, and 
backwards-compatibility has so far kept me from updating the name.


What we really are recording here are "workdays". In my attempt to keep 
the examples in my initial post both easy to understand and correct, I 
only translated the table name for STAFF, but felt that I'd lose 
consistency and thus correctness if things got more involved if I 
translated ERFASST as well (especially with backwards relation names etc.)


So the above is really an attempt to find all STAFF members who are 
assigned to a certain department regularly (via STAFF_BEREICHE), "OR" 
those who have spent a workday in that department in the given time range.
(So new staff members who have not yet spent a single workday anywhere 
would promptly be missing from any report and form with the 
INNER-joins-only query...)


Tom, many thanks for your help!

Best regards,
Carsten



--
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Carsten Fuchs Software
Industriegebiet 3, c/o Rofu, 55768 Hoppstädten-Weiersbach, Germany
Internet: http://www.cafu.de | E-Mail: i...@cafu.de

Cafu - the open-source game and graphics engine for multiplayer 3D action

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Re: Django throws an exception when I add data from admin interface

[Tom Evans]

On Fri, Jul 26, 2013 at 4:22 PM, Yu Yang  wrote:
> It is a blog app, I have created a Article model and Tag model. when I add
> data to Article table from Admin interface, the data is stored to database,
> but if I click the link to change the entry, it throws an exception "string
> indices must be integers, not str", the traceback is as follows:
> Environment:
>
>
> Request Method: GET
> Request URL: http://localhost:8000/admin/blog/article/1/
>
> Django Version: 1.5.1
> Python Version: 2.7.3
> Installed Applications:
> ('django.contrib.auth',
>  'django.contrib.contenttypes',
>  'django.contrib.sessions',
>  'django.contrib.sites',
>  'django.contrib.messages',
>  'django.contrib.staticfiles',
>  'django.contrib.admin',
>  'blog')
> Installed Middleware:
> ('django.middleware.common.CommonMiddleware',
>  'django.contrib.sessions.middleware.SessionMiddleware',
>  'django.middleware.csrf.CsrfViewMiddleware',
>  'django.contrib.auth.middleware.AuthenticationMiddleware',
>  'django.contrib.messages.middleware.MessageMiddleware')
>
>
> Traceback:
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/core/handlers/base.py"
> in get_response
>   115. response = callback(request, *callback_args,
> **callback_kwargs)
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/contrib/admin/options.py"
> in wrapper
>   372. return self.admin_site.admin_view(view)(*args,
> **kwargs)
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py"
> in _wrapped_view
>   91. response = view_func(request, *args, **kwargs)
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/views/decorators/cache.py"
> in _wrapped_view_func
>   89. response = view_func(request, *args, **kwargs)
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/contrib/admin/sites.py"
> in inner
>   202. return view(request, *args, **kwargs)
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py"
> in _wrapper
>   25. return bound_func(*args, **kwargs)
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py"
> in _wrapped_view
>   91. response = view_func(request, *args, **kwargs)
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py"
> in bound_func
>   21. return func(self, *args2, **kwargs2)
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/transaction.py"
> in inner
>   223. return func(*args, **kwargs)
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/contrib/admin/options.py"
> in change_view
>   1112. form = ModelForm(instance=obj)
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/forms/models.py"
> in __init__
>   244. object_data = model_to_dict(instance, opts.fields,
> opts.exclude)
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/forms/models.py"
> in model_to_dict
>   129. data[f.name] =
> list(f.value_from_object(instance).values_list('pk', flat=True))
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/models/fields/related.py"
> in value_from_object
>   1333. return getattr(obj, self.attname).all()
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/models/manager.py"
> in all
>   128. return self.get_query_set()
> File
> "/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/models/fields/related.py"
> in get_query_set
>   612. return
> self.instance._prefetched_objects_cache[self.prefetch_cache_name]
>
> Exception Type: TypeError at /admin/blog/article/1/
> Exception Value: string indices must be integers, not str
>
>
> the code of Article model and Tag model is as follows:
>
>
> class Tag(models.Model):
> name = models.CharField(max_length=50, unique=True, verbose_name='标签')
> slug = models.SlugField()
>
> def __unicode__(self):
> return self.name
>
> class Meta:
> verbose_name = '标签'
> verbose_name_plural = '标签'
>
> @models.permalink
> def get_absolute_url(self):
> return ('blog_tag', (), {'idx': self.id, 'slug': self.slug})
>
>
> # Create your models here.
> class Article(models.Model):
> """
> the model for blog article
> """
> STATUS_CHOICE = (
> (1, '编辑'),
> (2, '完成'),
> (3, '失效'),
> )
> title = models.CharField(max_length=100, verbose_name='标题')
> slug = models.SlugField(max_length=100)
> 

Django throws an exception when I add data from admin interface

[Yu Yang]

It is a blog app, I have created a Article model and Tag model. when I add 
data to Article table from Admin interface, the data is stored to database, 
but if I click the link to change the entry, it throws an exception "string 
indices must be integers, not str", the traceback is as follows:
Environment:


Request Method: GET
Request URL: http://localhost:8000/admin/blog/article/1/

Django Version: 1.5.1
Python Version: 2.7.3
Installed Applications:
('django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.admin',
 'blog')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware')


Traceback:
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/core/handlers/base.py"
 
in get_response
  115. response = callback(request, *callback_args, 
**callback_kwargs)
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/contrib/admin/options.py"
 
in wrapper
  372. return self.admin_site.admin_view(view)(*args, 
**kwargs)
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py"
 
in _wrapped_view
  91. response = view_func(request, *args, **kwargs)
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/views/decorators/cache.py"
 
in _wrapped_view_func
  89. response = view_func(request, *args, **kwargs)
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/contrib/admin/sites.py"
 
in inner
  202. return view(request, *args, **kwargs)
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py"
 
in _wrapper
  25. return bound_func(*args, **kwargs)
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py"
 
in _wrapped_view
  91. response = view_func(request, *args, **kwargs)
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/utils/decorators.py"
 
in bound_func
  21. return func(self, *args2, **kwargs2)
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/transaction.py"
 
in inner
  223. return func(*args, **kwargs)
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/contrib/admin/options.py"
 
in change_view
  1112. form = ModelForm(instance=obj)
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/forms/models.py"
 
in __init__
  244. object_data = model_to_dict(instance, opts.fields, 
opts.exclude)
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/forms/models.py"
 
in model_to_dict
  129. data[f.name] = 
list(f.value_from_object(instance).values_list('pk', flat=True))
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/models/fields/related.py"
 
in value_from_object
  1333. return getattr(obj, self.attname).all()
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/models/manager.py"
 
in all
  128. return self.get_query_set()
File 
"/home/yangyu/.virtualenvs/django-blog/local/lib/python2.7/site-packages/django/db/models/fields/related.py"
 
in get_query_set
  612. return 
self.instance._prefetched_objects_cache[self.prefetch_cache_name]

Exception Type: TypeError at /admin/blog/article/1/
Exception Value: string indices must be integers, not str


the code of Article model and Tag model is as follows:


class Tag(models.Model):
name = models.CharField(max_length=50, unique=True, verbose_name='标签')
slug = models.SlugField()

def __unicode__(self):
return self.name

class Meta:
verbose_name = '标签'
verbose_name_plural = '标签'

@models.permalink
def get_absolute_url(self):
return ('blog_tag', (), {'idx': self.id, 'slug': self.slug})


# Create your models here.
class Article(models.Model):
"""
the model for blog article
"""
STATUS_CHOICE = (
(1, '编辑'),
(2, '完成'),
(3, '失效'),
)
title = models.CharField(max_length=100, verbose_name='标题')
slug = models.SlugField(max_length=100)
content = models.TextField(verbose_name='内容')
created_time = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
modified_time = models.DateTimeField(default=datetime.now,
 verbose_name="修改时间")
tags 

.filter() and .exclude() don't add up

[Daniele Procida]

How is this possible?

# we start with a queryset actual_events

# get forthcoming_events using filter()

forthcoming_events = actual_events.filter(  
Q(single_day_event = True, date__gte = datetime.now()) | \
Q(single_day_event = False, end_date__gte = datetime.now())
)

# get previous_events using exclude() and exactly the same terms as above

previous_events = actual_events.exclude(  
Q(single_day_event = True, date__gte = datetime.now()) | \
Q(single_day_event = False, end_date__gte = datetime.now())
)

# And now:

# actual_events.count():  467
# forthcoming_events.count():  24
# previous_events.count():442

SInce I have run .filter() and .exclude() with identical terms, should they not 
between them contain all the items in the queryset they acted upon, *whatever* 
the terms used?

Daniele

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Re: ajax and django

[Lucas Magnum]

https://docs.djangoproject.com/en/dev/ref/contrib/csrf/#ajax

[]'s

Lucas Magnum.


2013/7/26 Lucas Magnum 

> Are you passing crsf_token in ajax post?
>
> []'s
>
> Lucas Magnum.
>
>
> 2013/7/26 heni yemun 
>
>> Hi,
>> I'm trying to get a django project interact with ajax based site. The
>> problem is that when i use the send function to send a POST data
>> asynchronously the django app returns a 500 code and the server doesn't do
>> anything. How do i correct 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+unsubscr...@googlegroups.com.
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>> Visit this group at http://groups.google.com/group/django-users.
>> For more options, visit https://groups.google.com/groups/opt_out.
>>
>>
>>
>
>

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Re: ajax and django

[Lucas Magnum]

Are you passing crsf_token in ajax post?

[]'s

Lucas Magnum.


2013/7/26 heni yemun 

> Hi,
> I'm trying to get a django project interact with ajax based site. The
> problem is that when i use the send function to send a POST data
> asynchronously the django app returns a 500 code and the server doesn't do
> anything. How do i correct this?
>
> --
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> "Django users" group.
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> email to django-users+unsubscr...@googlegroups.com.
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>
>
>

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ajax and django

[heni yemun]

Hi,
I'm trying to get a django project interact with ajax based site. The 
problem is that when i use the send function to send a POST data 
asynchronously the django app returns a 500 code and the server doesn't do 
anything. How do i correct this?

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Re: Avoid unbounded memory consumption when running `manage.py test`

[Matt McClure]

On Thursday, July 18, 2013 7:30:55 PM UTC-7, Matt McClure wrote:

> 1.  TestSuite. Here's a minimal hack to release the reference that 
> TestSuite would otherwise hold after a TestCase runs until the remainder of 
> the suite had finished.
>
> +self._tests.remove(test)
>

That turns out to be a bad idea because it modifies a list inside a loop 
iterating over it, making the loop skip items it should visit. Here's an 
updated change that doesn't suffer from that problem:

diff --git a/django/utils/unittest/suite.py b/django/utils/unittest/suite.py
index f39569b..8530200 100644
--- a/django/utils/unittest/suite.py
+++ b/django/utils/unittest/suite.py
@@ -1,5 +1,6 @@
 """TestSuite"""
 
+import gc
 import sys
 import unittest
 from django.utils.unittest import case, util
@@ -96,7 +97,11 @@ class TestSuite(BaseTestSuite):
 
 # private methods
 def _wrapped_run(self, result, debug=False):
-for test in self:
+while True:
+try:
+test = self._tests.pop(0)
+except IndexError:
+break
 if result.shouldStop:
 break
 
@@ -116,6 +121,7 @@ class TestSuite(BaseTestSuite):
 test(result)
 else:
 test.debug()
+#gc.collect()
 
 def _handleClassSetUp(self, test, result):
 previousClass = getattr(result, '_previousTestClass', None)

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Test using different database

[Antony]

Hi,

I have two databases on my settings file. One is sqlite and the other is 
postgis. It is a big project so some developers use sqllite and a few are 
using postgis. 
Now, when I try ./manage.py test command, I get the following,


Creating test database for alias 'default'...
AttributeError: 'DatabaseOperations' object has no attribute 'geo_db_type'
-

Is there a way to issue a command that contains the alias for the postgis 
database? I am looking for something like " ./manage.py test 
--database='spatial_db' " or similar. I have been looking around 
documentation and examples but haven't been able to come around this. Here 
is what I have been looking,
https://docs.djangoproject.com/en/dev/topics/testing/overview/#the-test-database
https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/unit-tests/
https://docs.djangoproject.com/en/dev/topics/testing/advanced/#topics-testing-advanced-multidb
http://stackoverflow.com/questions/4650509/different-db-for-testing-in-django

Any suggestions would be appreciated! 

Thanks in advance,
A

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Re: Can I only have one "get_queryset" per Viewpage?

[Pepsodent Cola]

Thanks Tom that got rid of the Debug message.
My views.py code and index.html code now looks like this.  But how exactly 
do I send my IndexView query results (filter1, 2 and 3) to my index.html 
template file?

The only thing I see on the webpage is this result:
No polls are available.


*views.py*

from polls.models import Word, Pronunciation, Altword
#___

class IndexView(generic.ListView):
template_name = 'polls/index.html'
context_object_name = 'context'

def get_queryset(self):
def get_context_data(**kwargs):
context = super(IndexView, self).get_context_data(**kwargs)

# Filter 1
filter_1 = Word.objects.filter(pub_date__lte=timezone.now()
).order_by('-pub_date')[:5]
# Filter 2
filter_2 = Word.objects.filter(translation='')
# Filter 3
filter_3 = 
Pronunciation.objects.filter(wordfield__translation='')

context.update({
"filter_1": filter_1,
"filter_2": filter_2,
"filter_3": filter_3
})
return context

#___




*index.html*


index.html

{% if context %}

{% for word in context %}
{{ word.wordfield 
}}
{% endfor %}

{% else %}
No polls are available.
{% endif %}







On Friday, July 26, 2013 11:29:54 AM UTC+2, Tom Evans wrote:
>
> On Fri, Jul 26, 2013 at 9:57 AM, Pepsodent Cola 
>  
> wrote: 
> > 
> > I am having trouble understanding what the Debug wants me to fix and how 
> > to fix it? 
> > Isn't my models already defined?  Isn't my queryset already defined in 
> > variables filter_1, 2 and 3? 
> > 
> > Exception Type: ImproperlyConfigured 
> > Exception Value: 
> > 
> > 'IndexView' must define 'queryset' or 'model' 
>
> You must provide get_queryset() method, this will be represented in 
> the template context by whatever name you set in context_object_name. 
> If you want extra objects in the template context, you can add them by 
> overriding get_context_data(), but you must still provide the 
> get_queryset() method, it is not optional. 
>
> Cheers 
>
> Tom 
>

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Re: Search from database

[Kamal Kaur]

On Fri, Jul 26, 2013 at 12:10 PM, Kamal Kaur  wrote:
> These commands don't extract the files:
> http://django-haystack.readthedocs.org/en/latest/installing_search_engines.html

Installed with this:
http://mirror.metrocast.net/apache/lucene/solr/4.4.0/solr-4.4.0.tgz

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kamalkaur188.wordpress.com
facebook.com/kaur.188

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Re: Can I only have one "get_queryset" per Viewpage?

[Tom Evans]

On Fri, Jul 26, 2013 at 9:57 AM, Pepsodent Cola  wrote:
>
> I am having trouble understanding what the Debug wants me to fix and how
> to fix it?
> Isn't my models already defined?  Isn't my queryset already defined in
> variables filter_1, 2 and 3?
>
> Exception Type: ImproperlyConfigured
> Exception Value:
>
> 'IndexView' must define 'queryset' or 'model'

You must provide get_queryset() method, this will be represented in
the template context by whatever name you set in context_object_name.
If you want extra objects in the template context, you can add them by
overriding get_context_data(), but you must still provide the
get_queryset() method, it is not optional.

Cheers

Tom

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Re: Can I only have one "get_queryset" per Viewpage?

[Pepsodent Cola]

I am having trouble understanding what the Debug wants me to fix and how to 
fix it?
Isn't my models already defined?  Isn't my queryset already defined in 
variables filter_1, 2 and 3?

Exception Type: ImproperlyConfigured  Exception Value: 

*'IndexView' must define 'queryset' or 'model'*

 Exception Location: 
/usr/local/lib/python2.7/dist-packages/django/views/generic/list.py 
in get_queryset, line 35


*views.py*

from polls.models import Word, Pronunciation
#___

class IndexView(generic.ListView):
template_name = 'polls/index.html'
#context_object_name = 'latest_poll_list'

#  def get_queryset(self):
def get_context_data(**kwargs):
context = super(IndexView, self).get_context_data(**kwargs)

# Filter 1
filter_1 = Word.objects.filter(pub_date__lte=timezone.now()
  ).order_by('-pub_date')[:5]
# Filter 2
filter_2 = Word.objects.filter(translation='')
# Filter 3
filter_3 = Pronunciation.objects.filter(wordfield__translation='')

context.update({
"filter_1": filter_1,
"filter_2": filter_2,
"filter_3": filter_3
})
return context
#___






On Tuesday, July 23, 2013 8:17:36 AM UTC+2, Tundebabzy wrote:
>
> Override your get method but it's easier to override the get_context_data 
> method like
> # From my head 
> def get_context_data(**kwargs):
> context = super(IndexView, self).get_context_data(**kwargs)
> #filter1 is already present as latest_poll_list in the context
> filter2 = Word.blah()
> filter3 = Word.blah_blah()
> context.update({
> "filter2": filter2,
> "filter3": filter3
> })
> return context
>
> Sent from my Windows Phone
> --
> From: Pepsodent Cola
> Sent: 7/22/2013 9:47 PM
> To: django...@googlegroups.com 
> Subject: Re: Can I only have one "get_queryset" per Viewpage?
>
> I'm having difficulty understanding the abstract explanations in that 
> documentation.
> Could you or somebody else explain this, by showing by example using my 
> code examples?
>
> *views.py*
>
> class IndexView(generic.ListView):
> template_name = 'polls/index.html'
> context_object_name = *'latest_poll_list'*
>
> def get_queryset(self):
> """
> Return the last five published polls
> (not including those set to be published in the future).
> """
> return Word.objects.filter(
> pub_date__lte=timezone.now()
> ).order_by('-pub_date')[:5]
>
> *### Filter 2*
> #Word.objects.filter(translation='')
> *### Filter 3*
> #Pronunciation.objects.filter(wordfield__translation='')
>
>
>
>
> *index.html*
>
> index.html
>
> {% if latest_poll_list %}
> 
> {% for word in *latest_poll_list* %}
> {{ word.wordfield 
> }}
> {% endfor %}
> 
> {% else %}
> No polls are available.
> {% endif %}
>
>
>
> How should I write my IndexView class so that Filter 1, 2 and 3 list 
> results are then sent to my index.html template file?
>
>
>
>
> On Monday, July 22, 2013 2:03:59 PM UTC+2, macndesign wrote:
>>
>> Hi, you can separate your querysets in get_context_data method.
>> See: 
>> https://docs.djangoproject.com/en/dev/ref/class-based-views/mixins-simple/#django.views.generic.base.ContextMixin.get_context_data
>>
>>
>> 2013/7/22 Pepsodent Cola 
>>
>>> Hi,
>>>
>>> Can I only have one "get_queryset" for each Viewpage?
>>> If I wanted to add another database list on the same Viewpage how would 
>>> that code look like for my Django *views.py* file?
>>>
>>> Example:
>>> https://docs.djangoproject.com/en/1.5/intro/tutorial04/#amend-views
>>>
>>> from polls.models import Choice, Poll
>>>
>>> class IndexView(generic.ListView):
>>> template_name = 'polls/index.html'
>>> *context_object_name = 'latest_poll_list'*
>>>
>>> *def get_queryset(self):*
>>> """Return the last five published polls."""
>>> return Poll.objects.order_by('-pub_date')[:5]
>>>
>>>
>>>
>>> I mean will "context_object_name" be able to separate between several 
>>> "get_queryset(self)"?
>>> Because I want to have several different poll_lists on the same Viewpage.
>>>
>>> context_object_name = 'latest_poll_list'
>>>
>>>  -- 
>>> You received this message because you are subscribed to the Google 
>>> Groups "Django users" group.
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>>> an email to django-users...@googlegroups.com.
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>>>  
>>>  
>>>
>>
>>
>>
>> -- 
>> Att. *Mário Araújo Chaves Neto*
>> *Programmer, Designer and U.I. Engineer*
>> *
>> *
>> *MBA in Design Digital* - 2008 - 

Re: Problem with chaining filters

[Pepsodent Cola]

Thanks Andrew,
I will practice more on doing Many-to-one relationships.

https://docs.djangoproject.com/en/1.5/topics/db/examples/many_to_one/



On Monday, July 22, 2013 1:45:49 PM UTC+2, Andrew Simpson wrote:
>
> Perhaps something like this would give you what you need:
> Pronunciation.objects.filter(word__translation='')
>

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Re: Search from database

[Kamal Kaur]

On Wed, Jul 24, 2013 at 5:15 AM, Amirouche Boubekki
 wrote:
> Apache solr or ElasticSearch: yes

Is this the right method for installation? What is the need to adduser?
http://www.cubrid.org/wiki_tutorials/entry/install-apache-solr-on-ubuntu

These commands don't extract the files:
http://django-haystack.readthedocs.org/en/latest/installing_search_engines.html


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