Begun GridFS documentation

docs/guide/gridfs.rst

@@ -0,0 +1,26 @@
+======
+GridFS
+======
+GridFS support comes in the form of the :class:`~mongoengine.FileField` field
+object. This field acts as a file-like object and provides a couple of
+different ways of inserting and retrieving data. Metadata such as content-type
+can also be stored alongside the stored files. In the following example, an
+document is created to store details about animals, including a photo:
+
+    class Animal(Document):
+        genus = StringField()
+        family = StringField()
+        photo = FileField()
+
+    marmot = Animal('Marmota', 'Sciuridae')
+
+    marmot_photo = open('marmot.jpg')   # Retrieve a photo from disk
+    marmot.photo = marmot_photo         # Store the photo in the document
+
+    marmot.save()
+
+So adding file data to a document is as easy as adding data to any other 
+
+.. versionadded:: 0.4
+
+

docs/guide/index.rst

@@ -10,3 +10,4 @@ User Guide
    defining-documents
    document-instances
    querying
+   gridfs

mongoengine/django/auth.py

@@ -78,7 +78,6 @@ class User(Document):
 
         # Normalize the address by lowercasing the domain part of the email
         # address.
-        # Not sure why we'r allowing null email when its not allowed in django
         if email is not None:
             try:
                 email_name, domain_part = email.strip().split('@', 1)

mongoengine/fields.py

@@ -20,6 +20,7 @@ __all__ = ['StringField', 'IntField', 'FloatField', 'BooleanField',
 
 RECURSIVE_REFERENCE_CONSTANT = 'self'
 
+
 class StringField(BaseField):
     """A unicode string field.
     """