Merge pull request #4 from flatiron/fix-is-valid

[resource] .isValid and Resourece#validate

lib/resourceful/resource.js

@@ -160,12 +160,8 @@ Resource.create = function (attrs, callback) {
     attrs.ctime = attrs.mtime = Date.now()
   }
 
-  var instance = new(this)(attrs);
-
-  // Before we create a new resource, perform a validation based on its schema
-  var validate = validator.validate(instance._properties, {
-    properties: this.schema.properties || {}
-  });
+  var instance = new(this)(attrs),
+      validate = this.prototype.validate(instance, this.schema);
 
   if (!validate.valid) {
     return callback(validate.errors);
@@ -182,10 +178,7 @@ Resource.create = function (attrs, callback) {
 };
 
 Resource.save = function (obj, callback) {
-  // Before we save a resource,  perform a validation based on its schema
-  var validate = validator.validate(obj, {
-    properties: this.schema.properties || {}
-  });
+  var validate = this.prototype.validate(obj, this.schema);
 
   if (!validate.valid) {
     return callback(validate.errors);
@@ -481,6 +474,16 @@ Resource.sync = function (callback) {
   });
 };
 
+Resource.prototype.validate = function(instance, schema) {
+  instance || (instance = this);
+  schema || (schema = this.schema || {});
+
+  // Before we create a new resource, perform a validation based on its schema
+  return validator.validate(instance._properties, {
+    properties: schema.properties || {}
+  });
+};
+
 //
 // Prototype
 //
@@ -540,7 +543,7 @@ Resource.prototype.__defineGetter__('id', function () {
 });
 
 Resource.prototype.__defineGetter__('isValid', function () {
-  return true;
+  return this.validate().valid;
 });
 
 Resource.prototype.__defineGetter__('properties', function () {