Async validations hooks

lib/abstract-class.js

@@ -107,15 +107,21 @@ AbstractClass.create = function (data) {
     if (data instanceof AbstractClass && !data.id) {
         obj = data;
         data = obj.toObject(true);
+        create();
     } else {
         obj = new this(data);
 
         // validation required
-        if (!obj.isValid()) {
-            return callback(new Error('Validation error'), obj);
+        obj.isValid(function (valid) {
+            if (!valid) {
+                callback(new Error('Validation error'), obj);
+            } else {
+                create();
             }
+        });
     }
 
+    function create() {
         obj.trigger("create", function () {
             this._adapter().create(modelName, data, function (err, id) {
                 if (id) {
@@ -127,6 +133,7 @@ AbstractClass.create = function (data) {
                 }
             }.bind(this));
         });
+    }
 };
 
 AbstractClass.exists = function exists(id, cb) {
@@ -221,14 +228,26 @@ AbstractClass.prototype.save = function (options, callback) {
         options.throws = false;
     }
 
-    if (options.validate && !this.isValid()) {
+    if (options.validate) {
+        this.isValid(function (valid) {
+            if (valid) {
+                save.call(this);
+            } else {
                 var err = new Error('Validation error');
+                // throws option is dangerous for async usage
                 if (options.throws) {
                     throw err;
                 }
-        return callback && callback(err, this);
+                if (callback) {
+                    callback(err, this);
+                }
+            }
+        }.bind(this));
+    } else {
+        save.call(this);
     }
 
+    function save() {
         this.trigger("save", function(){
             var modelName = this.constructor.modelName;
             var data = this.toObject(true);
@@ -249,6 +268,7 @@ AbstractClass.prototype.save = function (options, callback) {
                 this.constructor.create(this, callback);
             } 
         });
+    }
 };
 
 AbstractClass.prototype.isNewRecord = function () {
@@ -295,11 +315,17 @@ AbstractClass.prototype.updateAttributes = function updateAttributes(data, cb) {
         this[key] = data[key];
     }.bind(this));
 
-    if (!this.isValid()) {
-        var err = new Error('Validation error');
-        return cb && cb(err);
+    this.isValid(function (valid) {
+        if (!valid) {
+            if (cb) {
+                cb(new Error('Validation error'));
             }
+        } else {
+            update.call(this);
+        }
+    }.bind(this));
 
+    function update() {
         this.trigger("update", function(){
             this._adapter().updateAttributes(model, this.id, data, function (err) {
                 if (!err) {
@@ -316,6 +342,7 @@ AbstractClass.prototype.updateAttributes = function updateAttributes(data, cb) {
                 cb(err);
             }.bind(this));
         });
+    }
 };
 
 /**

lib/validatable.js

@@ -12,7 +12,7 @@ Validatable.validatesExclusionOf = getConfigurator('exclusion');
 Validatable.validatesFormatOf = getConfigurator('format');
 Validatable.validate = getConfigurator('custom');
 Validatable.validateAsync = getConfigurator('custom', {async: true});
-Validatable.validateUniquenessOf = getConfigurator('uniqueness');
+Validatable.validatesUniquenessOf = getConfigurator('uniqueness', {async: true});
 
 // implementation of validators
 var validators = {
@@ -70,8 +70,20 @@ var validators = {
             err();
         }
     },
-    custom: function (attr, conf, err, cb) {
-        conf.customValidator.call(this, err, cb);
+    custom: function (attr, conf, err, done) {
+        conf.customValidator.call(this, err, done);
+    },
+    uniqueness: function (attr, conf, err, done) {
+        var cond = {where: {}};
+        cond.where[attr] = this[attr];
+        this.constructor.all(cond, function (error, found) {
+            if (found.length > 1) {
+                err();
+            } else if (found.length === 1 && found[0].id !== this.id) {
+                err();
+            }
+            done();
+        }.bind(this));
     }
 };
 
@@ -88,6 +100,9 @@ Validatable.prototype.isValid = function (callback) {
     // exit with success when no errors
     if (!this.constructor._validations) {
         cleanErrors(this);
+        if (callback) {
+            callback(valid);
+        }
         return valid;
     }
 
@@ -121,6 +136,7 @@ Validatable.prototype.isValid = function (callback) {
     }
 
     if (valid) cleanErrors(this);
+    if (!async && callback) callback(valid);
 
     return valid;
 };
@@ -216,7 +232,8 @@ var defaultMessages = {
         'number': 'is not a number'
     },
     inclusion: 'is not included in the list',
-    exclusion: 'is reserved'
+    exclusion: 'is reserved',
+    uniqueness: 'is not unique'
 };
 
 function nullCheck(attr, conf, err) {

test/common_test.js

@@ -57,6 +57,10 @@ function testOrm(schema) {
             published: { type: Boolean, default: false }
         });
 
+        Post.validateAsync('title', function (err, done) {
+            process.nextTick(done);
+        });
+
         User.hasMany(Post,   {as: 'posts',  foreignKey: 'userId'});
         // creates instance methods:
         // user.posts(conds)

test/validations_test.coffee

@@ -27,6 +27,16 @@ validAttributes =
     createdByAdmin: false
     createdByScript: true
 
+getValidAttributes = ->
+    name: 'Anatoliy'
+    email: 'email@example.com'
+    state: ''
+    age: 26
+    gender: 'male'
+    domain: '1602'
+    createdByAdmin: false
+    createdByScript: true
+
 it 'should validate presence', (test) ->
     User.validatesPresenceOf 'email', 'name'
 
@@ -251,3 +261,16 @@ it 'should validate asynchronously', (test) ->
             test.ok not valid, 'not valid name'
             test.done()
 
+it 'should validate uniqueness', (test) ->
+    User.validatesUniquenessOf 'email'
+    User.create getValidAttributes(), ->
+        user = new User getValidAttributes()
+
+        # test.ok not user.isValid(), 'not valid because async validation'
+        user.isValid (valid) ->
+            test.ok not valid, 'email is not unique'
+            user.email = 'unique@email.tld'
+            user.isValid (valid) ->
+                test.ok valid, 'valid with unique email'
+                test.done()
+