How to show error messages in template after becameInvalid method

I'm using Ember.js to display a list of customers. Inside this template, I have a modal to create new customers. Now, when creating invalid customers (e.g. duplicate name), the errors should be shown in the template. How can I get this to work?

model

Docket.Customer = DS.Model.extend({
  name:        DS.attr('string'),
  initial:     DS.attr('string'),
  description: DS.attr('string'),
  errors: {},
  becameInvalid: function(errors) {
    this.set('errors', errors.get('errors'));
    console.log(this.get('errors'));
  }
});

console output

template

<h1>Customers<button data-uk-modal="{target:'#customer-modal'}" class="icon-plus">New customer</button></h1>

    <div id="customer-modal" class="uk-modal">
        <div class="uk-modal-dialog uk-modal-dialog-slide">
            <a class="uk-modal-close uk-close"></a>
            <form class="uk-form" {{action "save" on="submit"}}>
                <fieldset>
                    <legend>New customer</legend>
                    <div class="uk-form-row">
                        {{view Ember.TextField valueBinding="name" name="name" class="uk-width-1-1" placeholder="Name" required="" }}
                        {{#if errors}}foo{{/if}}
                        {{#if errors.name}}{{errors.name}}{{/if}}
                    </div>
                    <div class="uk-form-row">
                        {{view Ember.TextField valueBinding="initial" name="initial" class="uk-width-1-1" placeholder="Initial" required="" }}
                    </div>
                    <div class="uk-form-row">
                        {{view Ember.TextArea valueBinding="description" name="description" class="uk-width-1-1" placeholder="Description"}}
                    </div>
                    <div class="uk-form-row">
                        <button type="submit" class="icon-check">Save</button>
                    </div>
                </fieldset>
            </form>
        </div>
    </div>

    <ul class="entries">
    {{#each}}
       <li>
           <div class="actions">
               <button {{action "remove" id}} class="icon-close"></button>
           </div>
           <div class="link" {{action "edit" id}} data-uk-modal="{target:'#customer-modal'}">
                <span class="initial">{{initial}}</span>{{name}}
            </div>
       </li>
    {{else}}
        <li>No customers</li>
    {{/each}}
    </ul>