Fixed db_field load error

Fixes MongoEngine#45

.gitignore

@@ -13,5 +13,5 @@ env/
 .settings
 .project
 .pydevproject
-tests/bugfix.py
+tests/test_bugfix.py
 htmlcov/

docs/changelog.rst

@@ -4,6 +4,7 @@ Changelog
 
 Changes in 0.6.X
 ================
+- Fixed db_field data load error
 - Fixed recursive save with FileField
 
 Changes in 0.6.10

mongoengine/base.py

@@ -798,6 +798,7 @@ def __init__(self, **values):
                     dynamic_data[key] = value
         else:
             for key, value in values.items():
+                key = self._reverse_db_field_map.get(key, key)
                 setattr(self, key, value)
 
         # Set any get_fieldname_display methods

tests/test_document.py

@@ -664,6 +664,26 @@ class ExtendedBlogPost(BlogPost):
 
         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]
         """