Django snippets

#!/usr/bin/env python
# coding: utf-8

"""
Standalone django model test with a 'memory-only-django-installation'.
You can play with a django model without a complete django app installation.
    http://www.djangosnippets.org/snippets/1044/ (en)
    http://www.jensdiemer.de/permalink/150/mein-blog/355/mini-django-db-model-test-app/ (de)
    http://www.python-forum.de/viewtopic.php?f=3&t=15649 (de)

see also:
    https://github.com/readevalprint/mini-django/
    
Output from this current example code:
-------------------------------------------------------------------------------
 *** call 'syncdb':
Creating tables ...
Creating table auth_permission
Creating table auth_group_permissions
Creating table auth_group
Creating table auth_user_user_permissions
Creating table auth_user_groups
Creating table auth_user
Creating table auth_testmodel
Creating table django_content_type
Installing custom SQL ...
Installing indexes ...
Installed 0 object(s) from 0 fixture(s)
-------------------------------------------------------------------------------
new instance: TestModel entry: 'test'
instance data:
               id: None
     date_created: None
      last_update: None
             user: <User: test>
          content: 'test'
pk: 1
create date: 2012-05-10T05:14:06.820967
-------------------------------------------------------------------------------
- END -
-------------------------------------------------------------------------------    
"""

import os

BASE_PATH = os.path.abspath(os.path.dirname(__file__))
APP_LABEL = os.path.splitext(os.path.basename(__file__))[0]

os.environ["DJANGO_SETTINGS_MODULE"] = APP_LABEL

# settings:
DEBUG = TEMPLATE_DEBUG = True
INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    APP_LABEL,
)
DATABASES = {
    'default': {
        "ENGINE": "django.db.backends.sqlite3",
        "NAME": ":memory:",
    }
}

if __name__ == "__main__":
    #______________________________________________________________________________
    # TestModel model classes:

    from django.db import models
    from django.contrib.auth.models import User

    class TestModel(models.Model):
        date_created = models.DateTimeField(auto_now_add=True)
        last_update = models.DateTimeField(auto_now=True)
        user = models.ForeignKey(User, blank=True, null=True)
        content = models.TextField()

        def __unicode__(self):
            return u"TestModel entry: '%s'" % self.content

        class Meta:
            app_label = "auth"  # Hack: Cannot use an app_label that is under South control, due to http://south.aeracode.org/ticket/520

    #------------------------------------------------------------------------------

    print " *** call 'syncdb':"
    from django.core import management
    management.call_command('syncdb', verbosity=1, interactive=False)
    print "-"*79

#    print "_"*79
#    print " *** diffsettings:"
#    management.call_command('diffsettings', verbosity=1, interactive=False)
#    print
#    print "-"*79

    #__________________________________________________________________________
    # play with TestModel:

    user = User(username="test")
    user.save()

    instance = TestModel(content="test", user=user)
    print "new instance:", instance
    print "instance data:"
    for field in instance._meta.fields:
        print "%17s: %s" % (field.name, repr(getattr(instance, field.name)))

    instance.save()
    print "pk:", instance.pk
    print "create date:", instance.date_created.isoformat()

    print "-"*79
    print "- END -"