LocalError: unknown service graph.Dgraph

Issues Dgraph Clients
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1

Moved from GitHub pydgraph/13

Posted by Aurora81:

I use the code bellow to query dgraph(VERSION=0.7.4) , then it fails.
when use curl to query the same content, it’s OK.

In [1]: from pydgraph.client import DgraphClient
In [2]: pydgraph.client.__version__
Out[1]: '0.3.5'
In [3]: dg_client = DgraphClient('localhost', 8080)
In [4]: response = dg_client.query("""
        mutation
        {
            set
            {
                <alice> <name> \"Alice\" .
                <greg> <name> \"Greg\" .
                <alice> <follows> <greg> .
            }
        }
        """)

The error is look like this:

LocalError                                Traceback (most recent call last)
<ipython-input-14-22802b274334> in <module>()
      9             }
     10         }
---> 11         """)


/home/app/caizb/venv/local/lib/python2.7/site-packages/pydgraph/client.pyc in query(self, q, timeout)
     36     def query(self, q, timeout=None):
     37         request = graphresponse_pb2.Request(query=q)
---> 38         response = self.stub.Query(request, timeout)
     39         return response

/home/app/caizb/venv/local/lib/python2.7/site-packages/grpc/beta/_client_adaptations.pyc in __call__(self, request, timeout, metadata, with_call, protocol_options)
    298         self._channel, self._group, self._method, timeout, with_call,
    299         protocol_options, metadata, self._metadata_transformer, request,
--> 300         self._request_serializer, self._response_deserializer)
    301
    302   def future(self, request, timeout, metadata=None, protocol_options=None):

/home/app/caizb/venv/local/lib/python2.7/site-packages/grpc/beta/_client_adaptations.pyc in _blocking_unary_unary(channel, group, method, timeout, with_call, protocol_options, metadata, metadata_transformer, request, request_serializer, response_deserializer)
    196           credentials=_credentials(protocol_options))
    197   except grpc.RpcError as rpc_error_call:
--> 198     raise _abortion_error(rpc_error_call)
    199
    200

LocalError: LocalError(code=StatusCode.UNIMPLEMENTED, details="unknown service graph.Dgraph")
2

pawanrawal commented :

Hi @Aurora81

The python client was contributed by the community members and hasn’t been updated since. We changed to location of the proto file, that might be an issue. I will work on fixing it so that it is able to do basic mutations and queries. In the meantime you could still use the HTTP interface. See https://docs.dgraph.io.

3

Aurora81 commented :

Thanks @pawanrawal

The performance of HTTP interface is much lower than grpc interface, can you show me how to fix the issue.
Thanks very much!