Added operator

lib/model.js

@@ -303,7 +303,9 @@ function areComparable (a, b) {
 
 
 /**
- * Arithmetic comparators
+ * Arithmetic and comparison operators
+ * @param {Native value} a Value in the object
+ * @param {Native value} b Value in the query
  */
 comparisonFunctions.$lt = function (a, b) {
   return areComparable(a, b) && a < b;
@@ -321,6 +323,11 @@ comparisonFunctions.$gte = function (a, b) {
   return areComparable(a, b) && a >= b;
 };
 
+comparisonFunctions.$ne = function (a, b) {
+  if (!a) { return true; }
+  return !areThingsEqual(a, b);
+};
+
 
 /**
  * Match any of the subqueries

test/model.test.js

@@ -459,7 +459,7 @@ describe('Model', function () {
 
 
     // General behaviour is tested in the block about $lt. Here we just test operators work
-    describe('Other comparison operators: $lte, $gt, $gte', function () {
+    describe('Other comparison operators: $lte, $gt, $gte, $ne', function () {
 
       it('$lte', function () {
         model.match({ a: 5 }, { a: { $lte: 6 } }).should.equal(true);
@@ -479,6 +479,12 @@ describe('Model', function () {
         model.match({ a: 5 }, { a: { $gte: 4 } }).should.equal(true);
       });
 
+      it('$ne', function () {
+        model.match({ a: 5 }, { a: { $ne: 4 } }).should.equal(true);
+        model.match({ a: 5 }, { a: { $ne: 5 } }).should.equal(false);
+        model.match({ a: 5 }, { b: { $ne: 5 } }).should.equal(true);
+      });
+
     });