javascript - How to access array like object/values in ember.js -

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i need display data correctly. if try access thumbnail path, application throws following error:

assertion failed: attributes must numbers, strings or booleans, not [http://example.com/imgage/example_thumb.jpg]

how rid of error , show image(s) correctly?

debug: ------------------------------- debug: ember.version : 1.0.0 debug: handlebars.version : 1.0.0 debug: jquery.version : 2.0.3 debug: -------------------------------   // models/collection_model.js app.collection = ds.model.extend({     title: ds.attr('string'),     assets: ds.attr('object') });   // datastore.js app.collection.fixtures = [     {         "id": 1,         "title": "lorem ipsum",         "assets": {             "thumb": ['http://example.com/imgage/example_thumb.jpg'],             "thumb_large": ['http://example.com/imgage/example.jpg']         }     },     {         "id": 2,         "title": "losabim",         "assets": {             "thumb": ['http://example.com/imgage/example_thumb.jpg'],             "thumb_large": ['http://example.com/imgage/example.jpg']         }     } ];  // templates/collection.handlebar <script type="text/x-handlebars" data-template-name="collections">     <h2>collections</h2>     <ul>         {{#each collection in controller}}             <li>                 {{collection.title}}                 <img {{bind-attr src=collection.assets.thumb }}/>             </li>         {{/each}}     </ul> </script>

ember has firstobject , lastobject:

<img {{bind-attr src=collection.assets.thumb.firstobject }}/>

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