Add context info to validation error

lib/validations.js

@@ -595,6 +595,7 @@ function ValidationError(obj) {
     this.message = 'Validation error';
     this.statusCode = 400;
     this.codes = obj.errors && obj.errors.codes;
+    this.context = obj && obj.constructor && obj.constructor.modelName;
 
     Error.call(this);
 };

test/validations.test.js

@@ -103,6 +103,12 @@ describe('validations', function() {
                 });
             });
 
+            it('should allow to modify error after validation', function(done) {
+                User.afterValidate = function(next) {
+                    next();
+                };
+            });
+
         });
     });