Fixed db_field load error

Fixes mongoengine/MongoEngine#45

tests/test_bugfix.py

@@ -1,47 +0,0 @@
-# import pickle
-# import pymongo
-# import bson
-# import warnings
-
-# from datetime import datetime
-
-# import tempfile
-# import pymongo, gridfs
-
-import unittest
-from mongoengine import *
-from bson.objectid import ObjectId
-
-class BugFixTest(unittest.TestCase):
-
-
-    def setUp(self):
-
-        conn = connect(db='mongoenginetest')
-
-    def test_items_list(self):
-
-        class ActivityType1(EmbeddedDocument):
-            activity_id = IntField()
-            activity_name = StringField()
-
-        class ActivityType2(EmbeddedDocument):
-            activity_id = IntField()
-            activity_status = StringField()
-
-        class UserActivities(Document):
-            user_id = IntField()
-            activity = GenericEmbeddedDocumentField(choices=(ActivityType1, ActivityType2))
-
-
-        UserActivities.drop_collection()
-
-        user_id = 123
-        activity_id = 321
-        UserActivities(user_id=user_id, activity=ActivityType2(activity_id=activity_id, activity_status="A")).save()
-
-        self.assertEquals(1, UserActivities.objects(user_id=user_id, __raw__={'activity.activity_status': 'A'}).count())
-
-
-
-

tests/test_document.py

@@ -664,6 +664,26 @@ class DocumentTest(unittest.TestCase):
 
         BlogPost.drop_collection()
 
+    def test_db_field_load(self):
+        """Ensure we load data correctly
+        """
+        class Person(Document):
+            name = StringField(required=True)
+            _rank = StringField(required=False, db_field="rank")
+
+            @property
+            def rank(self):
+                return self._rank or "Private"
+
+        Person.drop_collection()
+
+        Person(name="Jack", _rank="Corporal").save()
+
+        Person(name="Fred").save()
+
+        self.assertEquals(Person.objects.get(name="Jack").rank, "Corporal")
+        self.assertEquals(Person.objects.get(name="Fred").rank, "Private")
+
     def test_explicit_geo2d_index(self):
         """Ensure that geo2d indexes work when created via meta[indexes]
         """