fix(hooks): updated_keys

Previously updated_keys mistakenly attempt to get the value from
`__updateKeys` of request,
but actually the request sent by API uses `_updatedKeys`.

Author: weakish

leancloud/engine/leanengine.py

@@ -264,8 +264,8 @@ def dispatch_cloud_hook(_cloud_codes, app_params, class_name, hook_name, params)
     obj = leancloud.Object.create(class_name)
     obj._update_data(params['object'])
 
-    if '__updateKeys' in params['object']:
-       obj.updated_keys = params['object']['__updateKeys']
+    if '_updatedKeys' in params['object']:
+       obj.updated_keys = params['object']['_updatedKeys']
 
     if hook_name.startswith('__before'):
         if obj.has('__before'):

tests/test_engine.py

@@ -394,7 +394,7 @@ def before_hook_object_update(obj):
         assert obj.updated_keys == ['clientValue']
 
     response = requests.post(url + '/__engine/1/functions/HookObject/beforeUpdate', json={
-        'object': {'clientValue': 'blah', '__updateKeys': ['clientValue']}
+        'object': {'clientValue': 'blah', '_updatedKeys': ['clientValue']}
     }, headers={
         'x-avoscloud-application-id': TEST_APP_ID,
         'x-avoscloud-application-key': TEST_APP_KEY,