Fixed undefined format function when calling one of the built in

validators form within a method validator. Fixes #98 and #111

README.md

@@ -819,6 +819,10 @@ Basic behaviour:
 
 ## Release notes
 
+#### Master
+
+* Fixed undefined format function when calling one of the built in validators form within a method validator. Fixes #98
+
 #### v0.8.2 [commits](https://github.com/thedersen/backbone.validation/compare/v0.8.1...v0.8.2)
 
 * `preValidate` now accepts a hash of attributes in addition to a key/value

dist/backbone-validation-amd.js

@@ -626,6 +626,10 @@
       };
     }());
 
+    _.each(defaultValidators, function(validator, key){
+      defaultValidators[key] = _.bind(defaultValidators[key], _.extend({}, formatFunctions, defaultValidators));
+    });
+
     return Validation;
   }(_));
   return Backbone.Validation;

dist/backbone-validation.js

@@ -619,5 +619,9 @@ Backbone.Validation = (function(_){
     };
   }());
 
+  _.each(defaultValidators, function(validator, key){
+    defaultValidators[key] = _.bind(defaultValidators[key], _.extend({}, formatFunctions, defaultValidators));
+  });
+
   return Validation;
 }(_));

src/backbone-validation.js

@@ -612,5 +612,11 @@ Backbone.Validation = (function(_){
     };
   }());
 
+  // Set the correct context for all validators
+  // when used form within a method validator
+  _.each(defaultValidators, function(validator, key){
+    defaultValidators[key] = _.bind(defaultValidators[key], _.extend({}, formatFunctions, defaultValidators));
+  });
+
   return Validation;
 }(_));

tests/validators/method.js

@@ -120,4 +120,23 @@ buster.testCase("method validator short hand syntax", {
 
         assert.equals({attr:'attr', name:'name', age:1}, this.computed);
     }
+});
+
+buster.testCase("method validator using other built in validator(s)", {
+    setUp: function() {
+        var Model = Backbone.Model.extend({
+            validation: {
+                name: function(val, attr, computed) {
+                    return Backbone.Validation.validators.length(val, attr, 4, this);
+                }
+            }
+        });
+
+        _.extend(Model.prototype, Backbone.Validation.mixin);
+        this.model = new Model();
+    },
+
+    "it should format the error message returned from the built in validator": function(){
+        assert.equals('Name must be 4 characters', this.model.preValidate('name', ''));
+    }
 });