feat(query): contains

lib/mapping/q.js

@@ -76,6 +76,8 @@ class QueryAssignment {
  * Contains functions that represents operators in a query.
  * @alias module:mapping~q
  * @type {Object}
+ * @property {function} contains Represents the CQL operator "CONTAINS".
+ * @property {function} containsKey Represents the CQL operator "CONTAINS KEY".
  * @property {function} in_ Represents the CQL operator "IN".
  * @property {function} gt Represents the CQL operator greater than ">".
  * @property {function} gte Represents the CQL operator greater than or equals to ">=" .
@@ -91,6 +93,14 @@ class QueryAssignment {
  * @property {function} remove Represents the CQL remove assignment used for collections, e.g: "col = col - x"
  */
 const q = {
+  contains: function contains(value) {
+    return new QueryOperator('CONTAINS', value);
+  },
+
+  containsKey: function containsKey(value) {
+    return new QueryOperator('CONTAINS KEY', value);
+  },
+
   in_: function in_(arr) {
     if (!Array.isArray(arr)) {
       throw new errors.ArgumentError('IN operator supports only Array values');
@@ -119,7 +129,7 @@ const q = {
   },
 
   and: function (condition1, condition2) {
-    return new QueryOperator('AND', [ condition1, condition2 ], true);
+    return new QueryOperator('AND', [condition1, condition2], true);
   },
 
   incr: function incr(value) {