Merge pull request #567 from tomprimozic/master

Implemented equality between Documents and DBRefs

mongoengine/base/document.py

@@ -229,8 +229,9 @@ class BaseDocument(object):
 
     def __eq__(self, other):
         if isinstance(other, self.__class__) and hasattr(other, 'id'):
-            if self.id == other.id:
-                return True
+            return self.id == other.id
+        if isinstance(other, DBRef):
+            return self._get_collection_name() == other.collection and self.id == other.id
         return False
 
     def __ne__(self, other):

mongoengine/document.py

@@ -69,7 +69,7 @@ class EmbeddedDocument(BaseDocument):
 
     def __eq__(self, other):
         if isinstance(other, self.__class__):
-            return self.to_mongo() == other.to_mongo()
+            return self._data == other._data
         return False
 
     def __ne__(self, other):

tests/document/instance.py

@@ -2556,5 +2556,65 @@ class InstanceTest(unittest.TestCase):
         f1.ref  # Dereferences lazily
         self.assertEqual(f1, f2)
 
+    def test_dbref_equality(self):
+        class Test2(Document):
+            name = StringField()
+
+        class Test3(Document):
+            name = StringField()
+
+        class Test(Document):
+            name = StringField()
+            test2 = ReferenceField('Test2')
+            test3 = ReferenceField('Test3')
+
+        Test.drop_collection()
+        Test2.drop_collection()
+        Test3.drop_collection()
+
+        t2 = Test2(name='a')
+        t2.save()
+
+        t3 = Test3(name='x')
+        t3.id = t2.id
+        t3.save()
+
+        t = Test(name='b', test2=t2, test3=t3)
+
+        f = Test._from_son(t.to_mongo())
+
+        dbref2 = f._data['test2']
+        obj2 = f.test2
+        self.assertTrue(isinstance(dbref2, DBRef))
+        self.assertTrue(isinstance(obj2, Test2))
+        self.assertTrue(obj2.id == dbref2.id)
+        self.assertTrue(obj2 == dbref2)
+        self.assertTrue(dbref2 == obj2)
+
+        dbref3 = f._data['test3']
+        obj3 = f.test3
+        self.assertTrue(isinstance(dbref3, DBRef))
+        self.assertTrue(isinstance(obj3, Test3))
+        self.assertTrue(obj3.id == dbref3.id)
+        self.assertTrue(obj3 == dbref3)
+        self.assertTrue(dbref3 == obj3)
+
+        self.assertTrue(obj2.id == obj3.id)
+        self.assertTrue(dbref2.id == dbref3.id)
+        self.assertFalse(dbref2 == dbref3)
+        self.assertFalse(dbref3 == dbref2)
+        self.assertTrue(dbref2 != dbref3)
+        self.assertTrue(dbref3 != dbref2)
+
+        self.assertFalse(obj2 == dbref3)
+        self.assertFalse(dbref3 == obj2)
+        self.assertTrue(obj2 != dbref3)
+        self.assertTrue(dbref3 != obj2)
+
+        self.assertFalse(obj3 == dbref2)
+        self.assertFalse(dbref2 == obj3)
+        self.assertTrue(obj3 != dbref2)
+        self.assertTrue(dbref2 != obj3)
+
 if __name__ == '__main__':
     unittest.main()