Id error

Hello django-ers,

Today I had a good dream in which I though I fixed something in my bug-magnet. This was the outcome:



# The Error

Environment:

Request Method: POST

Request URL: http://127.0.0.1:8000/main

Django Version: 1.4.1

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',

 'main',

 'django.contrib.admin')

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 "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response

  111.                         response = callback(request, *callback_args, **callback_kwargs)

File "/home/rob/b4buy/main/views.py" in main

  23.             form.save()

File "/home/rob/b4buy/main/forms.py" in save

  9.         super(self.__class__, self).save(*args, **kwargs)

File "/usr/local/lib/python2.7/dist-packages/django/forms/models.py" in save

  364.                              fail_message, commit, construct=False)

File "/usr/local/lib/python2.7/dist-packages/django/forms/models.py" in save_instance

  86.         instance.save()

File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in save

  463.         self.save_base(using=using, force_insert=force_insert, force_update=force_update)

File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in save_base

  551.                 result = manager._insert([self], fields=fields, return_id=update_pk, using=using, raw=raw)

File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py" in _insert

  203.         return insert_query(self.model, objs, fields, **kwargs)

File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py" in insert_query

  1576.     return query.get_compiler(using=using).execute_sql(return_id)

File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py" in execute_sql

  910.             cursor.execute(sql, params)

File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py" in execute

  40.             return self.cursor.execute(sql, params)

File "/usr/local/lib/python2.7/dist-packages/django/db/backends/sqlite3/base.py" in execute

  337.             return Database.Cursor.execute(self, query, params)

Exception Type: IntegrityError at /main

Exception Value: main_country.ruler_id may not be NULL

# the views.py

from django.shortcuts import render_to_response

from django.core.context_processors import csrf

from django.http import  HttpResponseRedirect

from main.models import *

from django.forms.models import modelform_factory

from main.forms import CountryForm

def main(request):

    c = {}

    c.update(csrf(request))

    c['title'] = 'Main'

    c['NO_COUNTRY'] = False

    form = CountryForm()

    c['form'] = form

    if not request.user.is_authenticated():

        return HttpResponseRedirect('/')

    if not request.user.country_set.all():

        c['NO_COUNTRY'] = True

    if request.method == 'POST':

        form = CountryForm(request.POST)

        form.ruler = request.user

        if form.is_valid():

            form.save()

    return render_to_response("main.html", c)

# the models.py

from django.db import models

from web.models import User

class Space(models.Model):

    name = models.CharField(max_length=50)

    owner = models.ForeignKey("Object")

    def __unicode__(self):

        return u'{} of {}'.format(self.name, self.owner)

class Object(models.Model):

    name      = models.CharField(max_length=100)

    container = models.ForeignKey(Space, blank=True, null=True)

    def __unicode__(self):

        return self.name + u' object'

class Country(Space):

    type     = models.CharField(choices=(('1', 'farmer'), ('2', 'producer'),

        ('3', 'traveler')), max_length=1,

            default='1')

    position = models.CommaSeparatedIntegerField(max_length=2)

    ruler = models.ForeignKey(User)

class Material(Object):

    mass    = models.IntegerField()

    quality = models.IntegerField()

    class Meta:

        abstract = True

    def use():

        self.delete()

class Tool(Object):

    mass = models.IntegerField()

    class Meta:

        abstract = True

class Hammer(Tool):

    def slam(self, object):

        object.times_slammed += 1

        object.save()

class Room(Space):

    max_items = models.IntegerField()

    def add(self, obect):

        object.container = self

        object.save()

class Building(Object):

    usable = models.BooleanField(default=False)

    def build(self):

        for object in container.object_set.all():

            if object in self.needed_materials:

                self.needed_materials.remove(object)

                object.use()

        if not needed_materials:

            self.usable = True

# the forms.py of course

from django import forms

from django.forms import HiddenInput

from main.models import Country, Object

class CountryForm(forms.ModelForm):

    def save(self, *args, **kwargs):

        self.position = '1, 1'

        self.owner = Object.objects.filter(name='Universe')[0]

        super(self.__class__, self).save(*args, **kwargs)

    class Meta:

        fields = ('name', 'type')

        model = Country

I add the Object Universe manually via the admin

If anybody could share a little help, I would gladly receive it.

Drvanon

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