ember.js - itemController and bindAttr not working -

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i have following code in emblem.js template:

each line_items itemcontroller=lineitem   .line_item.row-fluid.popover_link id="line_item_#{unbound id}" click="lineitemselected" class={selected ordered}     .span8       = product.name        if notsingleitem         span.quantity &nbsp x #{quantity}

a model:

app.lineitem = ds.model.extend   quantity: ds.attr 'number'    #this duplicated reason   product_price: ds.attr 'number'    order: ds.belongsto 'cluey.order'   product: ds.belongsto 'cluey.product'    total: ember.computed ->     @get('quantity') * @get('product_price')   .property('quantity', 'product_price')    notsingleitem: ember.computed ->     @get('quantity') != 1   .property('quantity')    div_id: ember.computed ->     "line_item_" + @get('id')   .property()    ordered: ds.attr 'boolean', { defaultvalue: false }   should_print: ds.attr 'boolean', { defaultvalue: true }

now, class attributes bound attributes on lineitem model has attribute "ordered" have set true test, not seem display class of ordered, when attribute set true.


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