API calls on nonexisting objects

[giulioturetta]

Calling methods on nonexisting objects returns 200 http response. For example:
https://services.phaidra-sandbox.univie.ac.at/api/object/o:999999999/cmodel
{"alerts":[],"cmodel":null,"status":200}
or
https://services.phaidra-sandbox.univie.ac.at/api/authz/check/o:999999999/ro
{"alerts":[],"status":200}

[giulioturetta]

Other methods which return an unexpected response when called on non-existent pids:

curl -X POST -u adminusername:password "https://services.phaidra-sandbox.univie.ac.at/api/object/o_442815/index"
{"result":{"pid":"o_442815","status":200}}

curl -X POST -u adminusername:password "https://services.phaidra-sandbox.univie.ac.at/api/object/o_442815/dc"
{"results":[{"pid":"o_442815","res":{"alerts":[{"msg":"Cannot determine status","type":"danger"}],"status":500}}]}