Merge pull request #1 from vdh/patch-1

Chaining support

src/index.js

@@ -23,25 +23,29 @@ export default class Criteria {
    * @param {string} operator String '==', '!=', '>', '>=', '<', '<=', 'in', 'not_in', 'like', 'between'
    * @param {string,number,Array} value Value(s) that match the operator.
    * The only operators that allow array values are in|out|nin
+   * @returns {Criteria}
    */
   appendExpression(fieldName, operator, value) {
     this.criteria.push({
       fieldName: fieldName,
       operator: operator,
       value: value
     });
+    return this;
   }
 
   /**
    * Appends a criteria object to the current criteria array.
    * The criteria object may be a new Criteria class or any object with a toString method.
    *
    * @param {Criteria} criteria
+   * @returns {Criteria}
    */
   appendCriteria(criteria) {
     this.criteria.push({
       criteria: criteria
     });
+    return this;
   }
 
   /**
@@ -105,4 +109,4 @@ export default class Criteria {
         return 'between';
     }
   }
-}
+}