help request on
http://stackoverflow.com/questions/17997744/convert-mongodb-query-unicode-to-json-using-json-util too

this error raise randomly
/core/handlers/wsgi.py", line 38, in _call_,
output = lookup_view(req),
File "auth/decorator.py", line 8, in wrap,
return fn(req,args,*kwargs),
File "auth/decorator.py", line 21, in wrap,
return fn(req,args,*kwargs),
File "contrib/admin/views.py", line 67, in submit_base_premission,
return json_response({"baseperm":baseperm,"Meta":{"gmsg":u"...","type":201}}),
File "render/render_response.py", line 85, in json_response,
return {"response":dumps(response,ensure_ascii=False).encode("utf8"),
File "/usr/local/lib/python2.7/dist-packages/bson/json_util.py", line 116, in dumps,
return json.dumps(_json_convert(obj), *args, **kwargs),
File "/usr/lib/python2.7/json/_init_.py", line 238, in dumps, referer:
**kw).encode(obj),
File "/usr/lib/python2.7/json/encoder.py", line 201, in encode,
chunks = self.iterencode(o, _one_shot=True),
File "/usr/lib/python2.7/json/encoder.py", line 264, in iterencode,
return _iterencode(o, 0),
File "/usr/lib/python2.7/json/encoder.py", line 178, in default,
raise TypeError(repr(o) + " is not JSON serializable"),
TypeError: ObjectId('51f7dcee95113b7a48e974fe') is not JSON serializable,