Add support for multidb with Django (Closes #171).

The ``factory.django.DjangoModelFactory`` now takes an extra option:

```
class MyFactory(factory.django.DjangoModelFactory):
    class Meta:
        model = models.MyModel
        database = 'replica'
```

This will create all instances of ``models.Model`` in the ``'replica'``
database.

1 files changed, 8 insertions, 1 deletions

diff --git a/docs/orms.rst b/docs/orms.rst
index a0afc40..5105e66 100644
--- a/docs/orms.rst
+++ b/docs/orms.rst
@@ -42,7 +42,14 @@ All factories for a Django :class:`~django.db.models.Model` should use the
 
 .. class:: DjangoOptions(factory.base.FactoryOptions)
 
-    The ``class Meta`` on a :class:`~DjangoModelFactory` supports an extra parameter:
+    The ``class Meta`` on a :class:`~DjangoModelFactory` supports extra parameters:
+
+    .. attribute:: database
+
+        .. versionadded:: 2.5.0
+
+        All queries to the related model will be routed to the given database.
+        It defaults to ``'default'``.
 
     .. attribute:: django_get_or_create