ember.js - Ember and Rails, Handling backend errors -

i'm attempting add backend validation ember/rails app. so, reading posts can find, have done following:

in rails model, i've added validates_presence_of , validates_uniqueness_of entries.

in rails controller, i've got method called after attempting save:

def validate(permission)   if permission.valid?     render json: permission   else     render json: {errors: permission.errors}, status: :unprocessable_entity   end end 

in ember route, have following:

actions: {   create: function(permission){     var route = this;      permission.save().then(function(){       route.transitionto('permissions');     });   } } 

when error returned backend, message on console:

error: assertion failed: error: backend rejected commit because invalid: {name: can't blank, description: can't blank}  "invaliderror@http://127.0.0.1/assets/ember-data.js?body=1:3512 activemodeladapter<.ajaxerror@http://127.0.0.1/assets/ember-data.js?body=1:235 superwrapper@http://127.0.0.1/assets/ember.js?body=1:1295 restadapter<.ajax/</hash.error@http://127.0.0.1/assets/ember-data.js?body=1:1530 jquery.callbacks/fire@http://127.0.0.1/assets/jquery.js?body=1:3100 jquery.callbacks/self.firewith@http://127.0.0.1/assets/jquery.js?body=1:3212 done@http://127.0.0.1/assets/jquery.js?body=1:9313 .send/callback@http://127.0.0.1/assets/jquery.js?body=1:9721 " 

i have following in template:

{{#if iserror}}   <p>there error saving record</p> {{/if}} {{#each error in errors.name}}   <p>{{error.message}}</p> {{/each}} {{#each error in errors.description}}   <p>{{error.message}}</p> {{/each}} 

however, nothing being displayed on page, assertion error in console log.

i'm not sure i'm missing, here.

you need handle failure state of save-promise prevent ember data bubbling failure console.

permission.save().then(function(){   route.transitionto('permissions'); }, function() {   // couldn't save, nothing it. }); 

that should prevent assertion error blocking execution , allow ember data work magic, adding errors returned backend model instance.