Django users Google Group

Re: Application scope variable

2009-11-23T06:23:07Z

Django applications do not really "start" or "stop"; they're a
collection of page handlers invoked when a request comes in, and (most
likely) do not have shared memory between requests and between
parallel requests being processed.

For information which persists between and across requests, storing it

Re: OneToOne across apps

2009-11-23T06:20:01Z

Thanks Javier.

It seems that I was perhaps thinking about it the wrong way. I
believe I understand what you mean - the REFERENCE just keeps the
table in order, it doesn't provide any performance boost. The speed
boost comes from the indexes that are created, which Django
automatically sets up.

Application scope variable

2009-11-23T05:58:24Z

Hi,

How can I have an application scope variable which should be loaded
everytime the app starts app, be in memory and accessible by all until
the app stops.

Thanks
Vishal

Problem with ModelForm

2009-11-21T18:53:46Z

hi i have a problem when i try to render my form without information .
so my code is :

models.py

class Obra(models.Model):

cod_obra= models.CharField("código da
obra",max_length=15,primary_ke y=True)
nome_da_empreitada= models.CharField(max_length=10 0)
data_de_incio = models.DateField("data de início")

How to customize admin site to upload multiple images

2009-11-23T05:32:00Z

hi,

model

class room_type(models.Model):
room_type_id = models.AutoField(primary_key=T rue,null=False,blank=False)
room_type_name =
models.CharField(max_length=10 0,unique=True,null=False,blank =False)
room_type_desc = models.TextField(null=True)
standard_occupancy = models.IntegerField()

Re: time date formatting

2009-11-23T05:22:51Z

Why the above will not work?

Re: OneToOne across apps

2009-11-23T05:07:29Z

Trev wrote:

all SQL engines i know about either ignore the REFERENCES hint, or use it for defining constraints. the SQL "...WHERE t1.fk=t2.pk" clause is enough to optimally use any index that could help. when Django creates the tables, it makes sure to add any index that would help on the usual JOINs

time date formatting

2009-11-20T22:36:55Z

If I want to format the current datetime for an rss feed, I do:

{% now "r" %}

I want to format a date the same way coming from a DB in this format
"2009-11-18 08:00:00"

Is there a way to format it with that same "r" format from a template
level?

This clearly does not work ;)

Re: Model inheritance - filtering base model only

2009-11-23T04:53:05Z

Perhaps there is a more efficient way, but in my quick test, one can't
filter() a queryset based on __class__ of the model, but seems one can
manually filter it afterwords:

qs = Player.objects.all()
for i,obj in enumerate(qs):
if obj.__class__ != Player:
del(qs[i])

Re: Question on how to update an existing record when using ModelForm

2009-11-23T04:29:05Z

You want to use the instance argument to the ModelForm constructor:

[link]

-Preston

OneToOne across apps

2009-11-20T04:28:00Z

Hi there,

I am new to Django and SQL, and I'm putting together my first Django
project. My project will contain multiple apps, and one app has a
model that I'd like to "One To One" extend with a table in a different
app. However, it's not behaving how I'd expect, and I can't seem to
find any info addressing my question.

Trying to do hierarchical tagging using django-tagging-0.3

2009-11-22T14:16:06Z

So, I'm trying to extend the Tag-model in tagging.models the following
way:

from django.db import models
from tagging.models import Tag

class TagContext(models.Model):
context = models.ForeignKey( Tag, unique=True,
related_name='context' )
parent = models.ForeignKey( Tag, related_name='children_set')

Question on how to update an existing record when using ModelForm

2009-11-23T00:47:37Z

Greetings,

I have a question on how to update an existing row in my database when one of the fields is my primary key. I am using ModelForm and Django-Piston - my main goal here is to have RESTful Post send to my webservice. I am able to have initial Posts be sent correctly (i.e. that Primary key value doesn't exist yet). The problem is when I want to update a value where the Primary key already exists - f.is_valid() it fails because "this UniqueIdentifier already exists". How can I do form validation using ModelForms to update an existing row?

Re: Django web flow

2009-11-23T00:41:42Z

"The Spring Web MVC framework offers a slightly higher level of
functionality: form controllers that implement a predefined work flow.
"
Source: [link]

Model inheritance - filtering base model only

2009-11-23T00:32:26Z

Hello,

I have these models:

class Player(models.Model):
.....

class PlayerM(Player):
...

If I do PlayerM.objects.all() e get all PlayerM objects and for
Player.objects.all() I get all Player and PlayerM as expected.

How can get only the objects of type Player (only retrieve the objects