TemplateHelpers

template.html

<script type="text/handlebars" id="my_list_template">
	<div class="{{whichuser}}">
		<img src="{{ image }}">
		<div class="message_body">
			{{{message_body}}}
		</div>
	</div>
</script>

view.coffee

class Message extends Marionette.ItemView
	template: '#my_item_template'
	templateHelpers: =>
		whichUser: =>
			if App.currentUser.id == @model.get('author')
				'self'
			else
				'other'


class ListMessages extends Marionette.CompositeView
	template: '#my_list_template'
	itemView: Message
	itemViewContainer: 'ul'