magic-removal: added django.contrib.contenttypes in anticipation for move from django.models.core

git-svn-id: http://code.djangoproject.com/svn/django/branches/magic-removal@1886 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/contenttypes/models.py

@@ -0,0 +1,41 @@
+from django.db import models
+from django.utils.translation import gettext_lazy as _
+
+class Package(models.Model):
+    label = models.CharField(_('label'), maxlength=20, primary_key=True)
+    name = models.CharField(_('name'), maxlength=30, unique=True)
+    class Meta:
+        verbose_name = _('package')
+        verbose_name_plural = _('packages')
+        db_table = 'packages'
+        ordering = ('name',)
+
+    def __repr__(self):
+        return self.name
+
+class ContentType(models.Model):
+    name = models.CharField(_('name'), maxlength=100)
+    package = models.ForeignKey(Package, db_column='package')
+    python_module_name = models.CharField(_('python module name'), maxlength=50)
+    class Meta:
+        verbose_name = _('content type')
+        verbose_name_plural = _('content types')
+        db_table = 'content_types'
+        ordering = ('package', 'name')
+        unique_together = (('package', 'python_module_name'),)
+
+    def __repr__(self):
+        return "%s | %s" % (self.package_id, self.name)
+
+    def get_model_module(self):
+        "Returns the Python model module for accessing this type of content."
+        return __import__('django.models.%s.%s' % (self.package_id, self.python_module_name), '', '', [''])
+
+    def get_object_for_this_type(self, **kwargs):
+        """
+        Returns an object of this type for the keyword arguments given.
+        Basically, this is a proxy around this object_type's get_object() model
+        method. The ObjectNotExist exception, if thrown, will not be caught,
+        so code that calls this method should catch it.
+        """
+        return self.get_model_module().get_object(**kwargs)