Free Blog built on Django and run in AppEngine

[Hudar]

Hi,


I just released a source code of my own blog as open source (called
'MeBlog'). Built the blog in django 1.2.3 and run in appengine.
This blog has common features for blog, such as manage posts, manage
pages, and manage media file. This is the first release, hope anyone
enjoy.
Feel free to write me any comment, sugggestion, bug report, or feature
request.

Source code available at http://bitbucket.org/hudarsono/meblog

Preview and Real site : http://blog.hudarsono.me  (my own blog)

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Re: Multiple Django/Python developer Positions- Atlanta, GA

[Kenneth Gonsalves]

On Fri, 2010-10-29 at 22:32 +0530, Venkatraman S wrote:
> On Fri, Oct 29, 2010 at 10:27 PM, Kenneth Gonsalves
> wrote:
> 
> > On Fri, 2010-10-29 at 07:18 -0700, Jack wrote:
> > > only US Citizens or Greencard holders need apply
> >
> > please do not put things like this on an international list
> >
> 
> I hear that there are many many unclaimed H1B slots :)
> But OTOH, i dont think its much of a problem when the recruiter
> clearly
> mentions the criteria; you dont want to get loads of applicants which
> do not
> satisfy the basic criteria. 

sorry, I got a bit upset - it is better to put criteria like this in the
subject line - not at the end of the mail. Save us some time reading.
-- 
regards
Kenneth Gonsalves
Senior Associate
NRC-FOSS at AU-KBC

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Re: minimum system requirements

[Javier Guerra Giraldez]

On Sun, Oct 31, 2010 at 12:10 PM, Peter Herndon  wrote:
> but I would not expect that single VPS to be able to handle more than a very 
> small number of visitors at once.

only if you consider several dozens  "a very small number"

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Apache config. admin page displays without stylesheets

[elliot]

Django runs as expected using manage.py runserver, but when I run it
from apache certain files are not found.

This is because the apache user has a different base directory than
the user running manage.py.  So, I added absolute paths to my
setting.py and other files. Now through apache one can access all the
modules and pages just fine.  But when I try to go to /admin I see
there is no css formatting. everything is very plain and not like the
version through runserver at all.

I assume this is because the css file is not being found.  But if the
admin code is found, and allows me the properly add items and
everything, why isn't the css found?

granted, the html code I've written doesn't have any css going on, so
I cant say that only the admin pages aren't rendering right.

my apache setup looks like:

SetHandler python-program
PythonHandler django.core.handlers.modpython
PythonPath "['/home/libadmin/library/django-ils/','/home/
libadmin/library/django-ils/bookshare'] + sys.path"
SetEnv DJANGO_SETTINGS_MODULE bookshare.settings
PythonOption django.root /home/libadmin/library/django-ils/bookshare/
PythonDebug On
   

Thinking that a relative path to the css file was being misused I
checked the source of the admin login page in firefox.  The admin site
is looking for 

this file exsists in both
/usr/share/python-support/python-django/django/contrib/admin/media/css/
login.css
/var/lib/python-support/python2.5/django/contrib/admin/media/css/
login.css

so, is django not finding this file because of an irrendered relative
path?  and if so, what is wrong with my configuration that this isn't
found?

(This is being run from a cloned mercurial repo, so I did not start
this project on this machine with the django scripts.  if this is the
issue, is there a way to manually do what the startproject or startapp
scripts are supposed to do?)

thanks,
Elliot

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Re: Call a function after a model with inlines is created

[Daniel Roseman]

On Oct 31, 4:46 pm, Martin Tiršel  wrote:
> Hello,
>
> I have two models BillingRequest and BillingRequestItem. I am using admin  
> and inlines, so when I am creating BillingRequest, I have some fields for  
> BillingRequestItems. Now, I need to send an email with some information  
>  from both models when I create new BillingRequest record. But I don't  
> know, where I should put the code. It have to be after all models are  
> saved, but where/when is it?
>
> Thanks,
> Martin

If this is only needed for the admin, you probably want to override
the ModelAdmin's response_add method. This is called after the add
form has been processed and all the resulting objects saved. Be sure
to call (and return) the super method after you've done your
processing.
--
DR.

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Re: Third party object like model field

[Shawn Milochik]

http://docs.djangoproject.com/en/dev/howto/custom-model-fields/

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Third party object like model field

[Alex Boyko]

Hello!
I'd like to ask a bit newbie question but cannot realize how to do it.
How I can implement following model:

class Something(models.Model):
   name = models.CharField(max_length = 50)
   #  and so on..
   #  next fields have predefined Django types
   #...
   ts = # where ts should be the object created by scikits.timeseries module
(http://pytseries.sourceforge.net/)

So, in short words, how can I create model with field that contains third
party object? Please point me the directions,

Thanks in Advance
Best Regards
Alex

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Re: minimum system requirements

[Peter Herndon]

On Oct 31, 2010, at 7:19 AM, ozgur yilmaz wrote:

> Hi,
> 
> I'm developing a project by django 1.2.3. Now it's time to bring the
> project to production. I'm looking for dedicated servers but i dont
> know the minimum hardware requirements. There are dedicated options
> with P4 cpus. Is there any information about requirements?

Hi Ozgur,

Minimum hardware requirements are relative to the amount of traffic you will be 
receiving.  It is certainly possible to host a Django web site on a single 
256MB VPS from e.g. Rackspace, but I would not expect that single VPS to be 
able to handle more than a very small number of visitors at once.  On the other 
hand, 2 load-balanced 512MB instances serving the Django app plus a larger 
instance running the database should suffice to handle a much larger number of 
concurrent users -- depending on how you architected the site.  If you have 
particular views that run lots of database queries and perform a large number 
of calculations, and those views turn out to be popular destinations for your 
visitors, you can very rapidly run out of resources.  On the other hand, if you 
have a good caching strategy in place and minimal required computation for your 
site, small servers can potentially handle a much larger load.

You will need determine for yourself how much computing hardware will suffice 
to handle your particular requirements.  You should approach this task by 
load-testing your application, using such tools as httpperf 
(http://code.google.com/p/httperf/) and Tsung 
(http://tsung.erlang-projects.org/) to simulate usage of your app.  You will 
want to test all your views, and also simulate what you think will be the 
normal use pattern.  With the knowledge of how each view responds to load, you 
can then tune those views individually for better performance.  With the 
knowledge of how your app responds to the normal use pattern, you can gauge how 
much hardware will be required to handle your estimated number of visitors.  In 
short, profile your app, and make decisions based on that knowledge.

As with many questions regarding deployment, the answer is "It depends".

---Peter Herndon

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Call a function after a model with inlines is created

[Martin Tiršel]

Hello,

I have two models BillingRequest and BillingRequestItem. I am using admin  
and inlines, so when I am creating BillingRequest, I have some fields for  
BillingRequestItems. Now, I need to send an email with some information  
from both models when I create new BillingRequest record. But I don't  
know, where I should put the code. It have to be after all models are  
saved, but where/when is it?


Thanks,
Martin

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Re: Tracking changes of a model

[Martin Tiršel]

First, I thought that I don't need all the functionality provided by  
similar applications but after I spend some hours trying to do it myself  
not being very successfull, I tried this app and after five minutes all  
was up and running :)


Thanks,
Martin

On Sat, 30 Oct 2010 15:03:48 +0200, Daniel Roseman   
wrote:



On Oct 30, 11:15 am, Martin Tiršel  wrote:




Sounds like django-reversion would fit the bill:
http://github.com/etianen/django-reversion

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Re: How to make base.html a little more useful?

[Wes Wagner]

That switched the lightbulb on above my head. Thanks!

-Wes


On Oct 31, 8:16 am, Shawn Milochik  wrote:
> Context processors, or a custom template tag, as described in James Bennett's 
> book, "Practical Django Projects."

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Re: How to make base.html a little more useful?

[Shawn Milochik]

Context processors, or a custom template tag, as described in James Bennett's 
book, "Practical Django Projects."

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Re: django-registration question: activation_key_expired.boolean = True

[adj7388]

> This particular object is used by the admin:
>
> http://docs.djangoproject.com/en/1.2/ref/contrib/admin/#django.contri...
>
> Read through that carefully and you'll see the 'boolean' option and a
> few other useful tricks.

Well, this is embarrassing. I had actually read (err, skimmed?) that
page looking for the answer, and did not see the needle in the
haystack. After a more careful reading, it's perfectly clear.

The attribute name 'boolean' threw me off a bit. I thought maybe there
was some Python magic happening related to the fact that the function
returned a boolean. Now all is clear. Thanks very much.

Alan

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How to make base.html a little more useful?

[Wes Wagner]

I am somewhat new to Django, but I have been able to figure out the
form, model, view, session flow etc fairly well. I am going to ask
this question in an abstract sense, because I really think a simple
abstract answer is enough to get my mind in the right place.

I have a base.html that has a header, left nav bar, main content area,
footer, etc. Of course some views override these sections to
drastically alter their content, etc (the main content being the most
common of course).

One thing that I would like to do is put some more useful nav links in
the left sidebar for users who are authenticated. Such as a list of
their friends who are also online (even if the data is pulled from
third party) or a list of projects they are currently working on so it
has hyperlinks to take them directly to those project editing pages.

What I am mentally missing is how to get that data fed into base.html
with every view call. Each time the left nav in base.html would be
rendered it would need to draw data from a couple different apps I
have installed on the site.

Can someone point me in the right direction?

-Wes Wagner

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Re: django-registration question: activation_key_expired.boolean = True

[James Bennett]

On Sun, Oct 31, 2010 at 8:48 AM, adj7388  wrote:
> What does that last line do? I have looked high and low in Django and
> Python documentation, but I can't find an example or explanation of
> this pattern. It appears to be clobbering the method
> 'activation_key_expired()' with a boolean that is always True. Surely
> there's something else at work here, isn't there?  Sorry if this is
> obvious to everyone but me, but I can't find the answer anywhere.

It sets an attribute on the instancemethod object
'activation_key_expired'. Remember: everything is an object, and you
can fiddle with attributes on any object.

This particular object is used by the admin:

http://docs.djangoproject.com/en/1.2/ref/contrib/admin/#django.contrib.admin.ModelAdmin.list_display

Read through that carefully and you'll see the 'boolean' option and a
few other useful tricks.


-- 
"Bureaucrat Conrad, you are technically correct -- the best kind of correct."

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Executing ssh scripts with django

[Marc Aymerich]

Hi guys,
I'm developing an ISP control panel for my organization. I just finished the
web interface based on django admin and now it's time to introduce calls to
the "system scripts" in order to make the changes effective on the ISP
servers (add users, manage virtualhosts, domains, and all this stuff). To
achieve that I was thinking in overriding the save and delete methods from
my models ( virtualhost model, domain model..). For example. before saving a
new "apache virtualhost" I want to run a proper "create vhost" script
through ssh using Paramiko library and if it is successful save the new
virtualhost into the database, otherwise send a message to enduser telling
that an error has occurred.


class Virtualhost(models.Model):


def save(self, *args, **kwargs):
 if not self.id:
 ssh = Ssh('create_new_virtualhost', self)
 if ssh.errors:
  message.add(self.user, 'something wrong was happend')
 else:
   super(self, Virtualhost).save(*args, **kwargs)


I'm wondering if this approach is the right way for the interaction between
django and ISP servers.
Moreover, I read that is highly recommended to use a message queue like
celery in order to avoid a possible 'long wait' until ssh command ends [1].
Would you execute the save function through celery? Is it safe? or maybe if
save() is executed asynchronously it can cause some unexpected behavior?

I need some "expert" opinion here :) Would you affront this situation in a
similar way or would you take a completely different approach?

Many thanks!!

[1]
http://www.quora.com/How-can-I-remotely-execute-a-script-via-SSH-from-a-Django-view






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django-registration question: activation_key_expired.boolean = True

[adj7388]

This question refers to line 205 here:
http://bitbucket.org/ubernostrum/django-registration/src/b6b213d84d32/registration/models.py

In a nutshell:

class RegistrationProfile(models.Model):

def activation_key_expired(self):
...
expiration_date =
datetime.timedelta(days=settings.ACCOUNT_ACTIVATION_DAYS)
return self.activation_key == self.ACTIVATED or \
   (self.user.date_joined + expiration_date <=
datetime.datetime.now())
activation_key_expired.boolean = True  # <- what does this do?

What does that last line do? I have looked high and low in Django and
Python documentation, but I can't find an example or explanation of
this pattern. It appears to be clobbering the method
'activation_key_expired()' with a boolean that is always True. Surely
there's something else at work here, isn't there?  Sorry if this is
obvious to everyone but me, but I can't find the answer anywhere.

Thanks.
Alan

btw: James Bennett's django-registration app is great. Elegant, well
designed, and does exactly what it needs to. I learned a lot about
django and django testing just by reading the code.

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minimum system requirements

[ozgur yilmaz]

Hi,

I'm developing a project by django 1.2.3. Now it's time to bring the
project to production. I'm looking for dedicated servers but i dont
know the minimum hardware requirements. There are dedicated options
with P4 cpus. Is there any information about requirements?

Thanks all,

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Local testing setup with Python 2.7 OS X installer, mod_wsgi and Apache?

[Dave E]

the Python 2.7 OS X installer builds a 'fat' Python install, which
*should work* with the OS X Apache2 install and mod_wsgi. The Python
2.6 OS X installer didn't support 64 bit architectures, necessitating
Apache2 to be trimmed 32 bit (
http://groups.google.com/group/modwsgi/browse_thread/thread/cacddadc0c3c8e93/c92475afc0cc31eb?q=
).

For a local mod_wsgi/Django/Apache testing environment with the
minimum of work (in this case using the OS X Apache and an OS X Python
2.7 installer), I'd like to hear from anyone with this setup on OS X
10.5, before I ditch my Python 2.6, rebuild mod_wsgi with Python 2.7
and restore 64 bit Apache2.

I originally posted this on StackOverflow but had no response, so
hopefully someone on this list has been there first:
http://stackoverflow.com/questions/4028394/python-2-7-os-x-installer-mod-wsgi-and-apache

Dave Everitt

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Re: Import csv file in admin

[Jirka Vejrazka]

> I try to follow the ideas, but i feel like taking the dirty way.
> Here's my work:
> Because i can't replace the modelform created by the admin for the
> "Data" model with a standard form as the Django docs says, i created a
> view to replace the "add" view generated by the admin and put a
> standard form:

Jorge,

  I think you need to get back to basics and try to understand what is
run where. All the code you are writing for Django is run on the
server and only web pages are *displayed* to users on their machines.
This means that in order to import a CSV file, you need to transfer it
to the server first and then you'll be able to import it there.

  Note that this has nothing to do with the admin site. This is a
fundamental think to understand.

  I'd suggest that you forget the admin site for the moment and focus
on the "transfer CSV file to server first". Take a look at the email
Felix has sent you regarding FileField and try to code the part that
handles file upload to the server. Once you have that, you can start
thinking about importing the contents of the file into the database.

  Cheers

Jirka

P.S. OK, there is a way to import data without uploading them to
server first, but it's much more complicated than the one outlined
above and involves multiple different technologies that have to work
together.

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