diff --git a/src/database/mongo.js b/src/database/mongo.js
index d26f33a6ea..571a7b33da 100644
--- a/src/database/mongo.js
+++ b/src/database/mongo.js
@@ -116,7 +116,7 @@
 
 		var _fields = {};
 		for(var i=0; i<fields.length; ++i) {
-			_fields[fields[i]] = 'baris';
+			_fields[fields[i]] = 1;
 		}
 
 		db.collection('objects').findOne({_key:key}, {fields:_fields}, function(err, item) {
@@ -154,11 +154,18 @@
 	}
 
 	module.isObjectField = function(key, field, callback) {
-		throw new Error('not-implemented');
+		module.getObjectField(key, field, function(err, item) {
+			callback(err, item !== undefined);
+		});
 	}
 
 	module.deleteObjectField = function(key, field, callback) {
-		throw new Error('not-implemented');
+		var data = {};
+		data[field] = "";
+		db.collection('objects').update({_key:key}, {$unset : data}, function(err, result) {
+			console.log(err, result);
+			callback(err, result);
+		});
 	}
 
 	module.incrObjectField = function(key, field, callback) {
diff --git a/src/routes/debug.js b/src/routes/debug.js
index f4cd387928..eec77f3402 100644
--- a/src/routes/debug.js
+++ b/src/routes/debug.js
@@ -127,14 +127,33 @@ var	DebugRoute = function(app) {
 				});
 			}
 
+			function isObjectField(callback) {
+				db.isObjectField(objectKey, 'age', function(err, data) {
+					console.log('isObjectField return', data);
+					callback(err, {'isObjectField':data});
+				});
+			}
+
+			function deleteObjectField(callback) {
+				db.deleteObjectField(objectKey, 'reputation', function(err, data) {
+					console.log('deleteObjectField return', data);
+					callback(err, {'deleteObjectField':data});
+				});
+			}
+
 			var tasks = [
 				setObject,
 				getObject,
+				deleteObjectField,
+				getObject,
 				setObjectField,
 				getObject,
+				deleteObjectField,
+				getObject,
 				getObjectField,
 				getObjectFields,
 				getObjectValues,
+				isObjectField
 			];
 
 			require('async').series(tasks, function(err, results) {