Eu tenho duas lista suspensa usando brasa.

Estou enfrentando um problema se a alteração do primeiro menu suspenso não chamar toda vez que o segundo menu suspenso.

Aqui eu adicionei meu código completo.

por favor me diga o que eu fiz de errado neste código

 <script type="text/x-handlebars">
        <h2>Welcome to Ember.js</h2>

        {{outlet}}
    </script>

<script type="text/x-handlebars" data-template-name="index">


    <div>
        {{view  "select"  content=model    prompt="Please select a name"  selectionBinding="controllers.comboBox.model"  optionValuePath="content.title" optionLabelPath="content.body"  }}
    </div>
    {{input type="hidden" value=controllers.comboBox.model.title id="comboval"}}

    <div>
      {{view  "select"   content=model1    prompt="Please select a name"  optionValuePath="content.title"  optionLabelPath="content.title" }}
    </div>

    <p>
        Selected: {{controllers.comboBox.model.title}}
    </p>
</script>

app.js

App = Ember.Application.create({

});

App.Router.map(function () {

});

App.IndexRoute = Ember.Route.extend({
    model: function () {
        return posts;
    }
});

App.IndexController = Em.ArrayController.extend({
    needs: ["comboBox"],
    sendValueToServer: function () {       
        document.getElementById("comboval").value = this.get("controllers.comboBox.model.title");
    }.observes("controllers.comboBox.model"),


    model1: function () {   

        var valueq = this.get('controllers.comboBox.model.title');
        console.log("value "+valueq);      
        return posts1;  
    }.property("controllers.comboBox.model")
});

App.ComboBoxController = Em.Controller.extend({
    model: null,
});

App.ComboBox1Controller = Em.Controller.extend({
    model1: null,  
});
posts = [{
    title: "Raja",
    body: "There are lots of à la carte software environments in this world."
}, {
    title: "Broken Promis,es",
    body: "James Coglan wrote a lengthy article about Promises in node.js."
},
{
title: "Broken",
body: "James Coglan wrote a lengthy article about Promises in node.js."
}

];


posts1 = [{
    title: "Raja",
    body: "There are lots of à la carte software environments in this world."
}, {
    title: "Broken Promises",
    body: "James Coglan wrote a lengthy article about Promises in node.js."
},
{
    title: "Broken",
    body: "James Coglan wrote a lengthy article about Promises in node.js."
}

];