[SR-Users] ndb_mongodb -Sending Query to Mongo

Hi Guys, I am using the ndb_mongodb module, and Im just trying to return values from the dispatcher table, in particular the setid of a particular entry depending on its attrs value. If I query using mongodb shell command it works fine, here I enter test.com and it returns only the setid value, or 2; db.dispatcher.find( { attrs: "test.com" }, { setid: 1, _id: 0 } ){ "setid" : 2 } However I have been having issues getting this to work using mongodb_find_one, as I would of thought the following route return the same; if(mongodb_find_one("ml-mongodb", "kamailiosbc", "dispatcher", "{ \"attrs\" : \"test.com\" },{ \"setid\": \"1\", \"_id\": \"0\" }", "mgr1")) However it returns all the entries relating to that attrs columm from dispatcher table, instead of just setid. Is it possible to do this? I am stuggling to find the json format to acheive the same thing. Also in terms of the mgr1 response, I see its contained within the $mongodb(key), can I drill down to get specific fields from it or would I need to use transformations or jansson to do this? Many thanks Jon