Improve ORM layer import paths (Closes #186).

You may now use the following code:

    import factory
    factory.alchemy.SQLAlchemyModelFactory
    factory.django.DjangoModelFactory
    factory.mongoengine.MongoEngineFactory

4 files changed, 41 insertions, 5 deletions

diff --git a/docs/changelog.rst b/docs/changelog.rst
index c871ce8..eea38c5 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -14,6 +14,8 @@ ChangeLog
     - :class:`factory.Iterator` no longer begins iteration of its argument at import time,
       thus allowing to pass in a lazy iterator such as a Django queryset
       (i.e ``factory.Iterator(models.MyThingy.objects.all())``).
+    - Simplify imports for ORM layers, now available through a simple ``factory`` import,
+      at ``factory.alchemy.SQLAlchemyModelFactory`` / ``factory.django.DjangoModelFactory`` / ``factory.mongoengine.MongoEngineFactory``.
 
 *Bugfix:*
 
diff --git a/docs/orms.rst b/docs/orms.rst
index bbe91e6..26390b5 100644
--- a/docs/orms.rst
+++ b/docs/orms.rst
@@ -273,6 +273,34 @@ factory_boy supports `MongoEngine`_-style models, through the :class:`MongoEngin
 
               This feature makes it possible to use :class:`~factory.SubFactory` to create embedded document.
 
+A minimalist example:
+
+.. code-block:: python
+
+    import mongoengine
+
+    class Address(mongoengine.EmbeddedDocument):
+        street = mongoengine.StringField()
+
+    class Person(mongoengine.Document):
+        name = mongoengine.StringField()
+        address = mongoengine.EmbeddedDocumentField(Address)
+
+    import factory
+
+    class AddressFactory(factory.mongoengine.MongoEngineFactory):
+        class Meta:
+            model = Address
+
+        street = factory.Sequence(lambda n: 'street%d' % n)
+
+    class PersonFactory(factory.mongoengine.MongoEngineFactory):
+        class Meta:
+            model = Person
+
+        name = factory.Sequence(lambda n: 'name%d' % n)
+        address = factory.SubFactory(AddressFactory)
+
 
 SQLAlchemy
 ----------
@@ -327,8 +355,9 @@ A (very) simple example:
 
     Base.metadata.create_all(engine)
 
+    import factory
 
-    class UserFactory(SQLAlchemyModelFactory):
+    class UserFactory(factory.alchemy.SQLAlchemyModelFactory):
         class Meta:
             model = User
             sqlalchemy_session = session   # the SQLAlchemy session object
diff --git a/factory/__init__.py b/factory/__init__.py
index 80eb6a8..843cf99 100644
--- a/factory/__init__.py
+++ b/factory/__init__.py
@@ -40,9 +40,6 @@ from .base import (
     use_strategy,
 )
 
-# Backward compatibility; this should be removed soon.
-from .mogo import MogoFactory
-from .django import DjangoModelFactory
 from .faker import Faker
 
 from .declarations import (
@@ -84,3 +81,12 @@ from .helpers import (
     post_generation,
 )
 
+# Backward compatibility; this should be removed soon.
+from . import alchemy
+from . import django
+from . import mogo
+from . import mongoengine
+
+MogoFactory = mogo.MogoFactory
+DjangoModelFactory = django.DjangoModelFactory
+
diff --git a/factory/alchemy.py b/factory/alchemy.py
index 6408393..20da6cf 100644
--- a/factory/alchemy.py
+++ b/factory/alchemy.py
@@ -19,7 +19,6 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 from __future__ import unicode_literals
-from sqlalchemy.sql.functions import max
 
 from . import base