Oh sorry, let it then be:
Group.objects.filter(name__in=[0,1]) # or whatever filter, as long
as it is not all()
The import problem will still persist when running 'python run.py'
So again:
Group.objects.all() #will work fine and not give any errors.
Group.objects.filter(name=1) #or any kind of filter will cause the
following import error.
File "/home/robin/test/toast/two/models.py", line 2, in <module>
from numbers.models import Number
ImportError: cannot import name Number
On Apr 22, 9:02 pm, Christian Berg <xen...@animanga.at> wrote:
> Hi!
>
> Your Posting says:
> name=models.IntegerField()
> Thats an Integer field thats can hold numbers like 1 or 98722
>
> But then you do this:
> Group.objects.filter(name='blah')
> 'blah' is an Character-String and not an Number.
>
> I belive that the name should contains something with letters so you shoud
> change it to
> name=models.CharField(max_length=50)
> or maybe
> name=models.SlugField()
>
> The whole thing you are doing here looks pretty much like the contrib.auth
> module in Django.
> Maybe you shound use this instead, it saves you lot of redudant work.
> (D.R.Y.!)
>
> On Wed, 22 Apr 2009 06:33:28 -0700 (PDT), robin <robinc...@gmail.com>
> wrote:
>
>
>
> > I have an unexplainable problem involving importing from 3 apps and
> > one python script.
> > Thank you to those who took the time to understand this problem.
>
> > Sorry I cannot explain this problem, I tried to make it as simple as
> > possible below.
>
> > 'acc' has many 'numbers' which has a one-to-one relationship with
> > 'two'.
>
> > 'python run.py' tries to import from 'numbers' but causes import
> > errors when 'acc' modelchoicefield queryset changes from 'all' to
> > 'filter'
>
> > ----------------acc/models.py--------------
>
> > from django.db import models
> > from django import forms
>
> > class Group(models.Model):
> > name=models.IntegerField()
>
> > class User(models.Model):
> > group=models.ForeignKey(Group)
>
> > class UserForm(forms.ModelForm):
> > group=forms.ModelChoiceField(Group.objects.all()) #causes problem if
> > changed to Group.objects.filter(name='blah')
> > class Meta:
> > model=User
>
> > ----------------number/models.py------------
>
> > from django.db import models
> > from acc.models import User
>
> > class Number(models.Model):
> > name=models.IntegerField()
>
> > -------------------two/models.py-----------------
>
> > from django.db import models
> > from numbers.models import Number
>
> > class Two(models.Model):
> > number=models.OneToOneField(Number,primary_key=True) #potential
> > problem line
>
> > ---------------run.py-----------------------
>
> > #!/usr/bin/env python
> > from django.core.management import setup_environ
> > import settings
> > setup_environ(settings)
> > from numbers.models import Number
>
> > #######PROBLEM-#######
>
> > With the above setup, if i execute: python run.py, it should be fine.
> > BUT the problem occurs the moment i change acc.models from:
>
> > group=forms.ModelChoiceField(Group.objects.all())
> > #TO#
> > group=forms.ModelChoiceField(Group.objects.filter(name='blah'))
>
> > The last error it will show is:
>
> > File "/home/robin/test/toast/two/models.py", line 2, in <module>
> > from numbers.models import Number
> > ImportError: cannot import name Number
>
> > Thanks a lot,
> > Robin
>
> > The complete errors are below:
>
> > Traceback (most recent call last):
> > File "expire_listing.py", line 6, in <module>
> > from numbers.models import Number
> > File "/home/robin/test/toast/numbers/models.py", line 2, in <module>
> > from acc.models import User
> > File "/home/robin/test/toast/acc/models.py", line 11, in <module>
> > class UserForm(forms.ModelForm):
> > File "/home/robin/test/toast/acc/models.py", line 12, in UserForm
> > group=forms.ModelChoiceField(Group.objects.filter(name__in=[0,1]))
> > File "/usr/lib/python2.5/site-packages/django/db/models/manager.py",
> > line 102, in filter
> > return self.get_query_set().filter(*args, **kwargs)
> > File "/usr/lib/python2.5/site-packages/django/db/models/query.py",
> > line 489, in filter
> > return self._filter_or_exclude(False, *args, **kwargs)
> > File "/usr/lib/python2.5/site-packages/django/db/models/query.py",
> > line 507, in _filter_or_exclude
> > clone.query.add_q(Q(*args, **kwargs))
> > File "/usr/lib/python2.5/site-packages/django/db/models/sql/
> > query.py", line 1258, in add_q
> > can_reuse=used_aliases)
> > File "/usr/lib/python2.5/site-packages/django/db/models/sql/
> > query.py", line 1133, in add_filter
> > negate=negate, process_extras=process_extras)
> > File "/usr/lib/python2.5/site-packages/django/db/models/sql/
> > query.py", line 1309, in setup_joins
> > field, model, direct, m2m = opts.get_field_by_name(name)
> > File "/usr/lib/python2.5/site-packages/django/db/models/options.py",
> > line 281, in get_field_by_name
> > cache = self.init_name_map()
> > File "/usr/lib/python2.5/site-packages/django/db/models/options.py",
> > line 311, in init_name_map
> > for f, model in self.get_all_related_m2m_objects_with_model():
> > File "/usr/lib/python2.5/site-packages/django/db/models/options.py",
> > line 388, in get_all_related_m2m_objects_with_model
> > cache = self._fill_related_many_to_many_cache()
> > File "/usr/lib/python2.5/site-packages/django/db/models/options.py",
> > line 402, in _fill_related_many_to_many_cache
> > for klass in get_models():
> > File "/usr/lib/python2.5/site-packages/django/db/models/loading.py",
> > line 136, in get_models
> > self._populate()
> > File "/usr/lib/python2.5/site-packages/django/db/models/loading.py",
> > line 57, in _populate
> > self.load_app(app_name, True)
> > File "/usr/lib/python2.5/site-packages/django/db/models/loading.py",
> > line 72, in load_app
> > mod = __import__(app_name, {}, {}, ['models'])
> > File "/home/robin/test/toast/two/models.py", line 2, in <module>
> > from numbers.models import Number
> > ImportError: cannot import name Number
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
To unsubscribe from this group, send email to
django-users+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---
