fix

guillotina/content.py

@@ -261,6 +261,7 @@ def __getattr__(self, name):
             name
         )
         if value is not _marker:
+            self.__setattr__(name, value)
             return value
         raise AttributeError(name)
 

guillotina/tests/test_content.py

@@ -159,8 +159,8 @@ def test_base_object():
 )
 async def update_default_dict(context, request):
     context.images['new-key'] = 'value'
+    assert len(context.images) == 1
     request._txn.register(context)
-    assert len(context.images) == 0  # wat?
 
 
 @configure.service(
@@ -180,7 +180,7 @@ class ICustomContentType(interfaces.IItem):
         key_type=schema.TextLine(),
         value_type=schema.TextLine(),
         required=False,
-        default={}
+        defaultFactory=dict
     )
 
 
@@ -209,19 +209,15 @@ async def test_fail_to_add_key_val_dict(container_requester):
 
         resp, status = await requester('GET', '/db/guillotina/test')
         assert status == 200
-
-        # Should return {'new-key': 'value'}
-        assert resp['images'] == {}
+        assert resp['images'] == {'new-key': 'value'}
 
         # Try using 'POST' instead of 'PATCH'
         _, status = await requester('POST', '/db/guillotina/test/@update-dict')
         assert status == 200
 
         resp, status = await requester('GET', '/db/guillotina/test')
         assert status == 200
-
-        # Should return {'new-key': 'value'}
-        assert resp['images'] == {}
+        assert resp['images'] == {'new-key': 'value'}
 
 
 async def test_overwrite_dict_works(container_requester):