dont return unnecessary data

src/database/mongo/sets.js

@@ -98,7 +98,7 @@ module.exports = function(db, module) {
 	module.isSetMember = function(key, value, callback) {
 		value = helpers.valueToString(value);
 
-		db.collection('objects').findOne({_key:key, members: value}, function(err, item) {
+		db.collection('objects').findOne({_key:key, members: value}, {_id: 0, members: 0},function(err, item) {
 			callback(err, item !== null && item !== undefined);
 		});
 	};
@@ -108,7 +108,7 @@ module.exports = function(db, module) {
 			values[i] = helpers.valueToString(values[i]);
 		}
 
-		db.collection('objects').findOne({_key:key, members: {$in : values}}, function(err, items) {
+		db.collection('objects').findOne({_key: key, members: {$in : values}}, {_id: 0, _key: 0}, function(err, items) {
 			if (err) {
 				return callback(err);
 			}
@@ -125,7 +125,7 @@ module.exports = function(db, module) {
 
 		value = helpers.valueToString(value);
 
-		db.collection('objects').find({_key: {$in : sets}, members: value}).toArray(function(err, result) {
+		db.collection('objects').find({_key: {$in : sets}, members: value}, {_id:0, members: 0}).toArray(function(err, result) {
 			if(err) {
 				return callback(err);
 			}
@@ -143,13 +143,13 @@ module.exports = function(db, module) {
 	};
 
 	module.getSetMembers = function(key, callback) {
-		db.collection('objects').findOne({_key:key}, {members:1}, function(err, data) {
+		db.collection('objects').findOne({_key: key}, {members: 1}, {_id: 0, _key: 0}, function(err, data) {
 			callback(err, data ? data.members : []);
 		});
 	};
 
 	module.getSetsMembers = function(keys, callback) {
-		db.collection('objects').find({_key: {$in: keys}}, {_key: 1, members: 1}).toArray(function(err, data) {
+		db.collection('objects').find({_key: {$in: keys}}, {_id: 0, _key: 1, members: 1}).toArray(function(err, data) {
 			if (err) {
 				return callback(err);
 			}
@@ -167,7 +167,7 @@ module.exports = function(db, module) {
 	};
 
 	module.setCount = function(key, callback) {
-		db.collection('objects').findOne({_key:key}, function(err, data) {
+		db.collection('objects').findOne({_key: key}, {_id: 0}, function(err, data) {
 			return callback(err, data ? data.members.length : 0);
 		});
 	};