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POProper way to observe ChildViews in Ember?
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  1. POProper way to observe ChildViews in Ember?
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    copied!<p>Here's a <a href="http://jsfiddle.net/EsF4R/174/" rel="nofollow">fiddle for this question</a> (make sure you have your console open):</p> <p>Basically, I have a handlebars block view as a parent, then loop through an array of items and create child block views for each item. Later, those children are modified in some way, and I want to detect and handle that event.</p> <p>Summary Code:</p> <pre><code>{{#view App.outerView}} {{#each item in items}} &lt;h6&gt;Person:&lt;/h6&gt; {{#view App.innerView}} &lt;dl&gt; &lt;dt&gt;First Name&lt;/dt&gt;&lt;dd&gt;{{item.first}}&lt;/dd&gt; &lt;dt&gt;Last Name&lt;/dt&gt;&lt;dd&gt;{{item.last}}&lt;/dd&gt; &lt;/dl&gt; {{/view}} {{/each}} {{/view}} </code></pre> <p>At some later point:</p> <pre><code>controller.get( 'items' ).pushObject( 'new item' ); </code></pre> <p>In the jsFiddle, I am trying to keep the last child object always highlighted (active = true). When the outerView is initially inserted, we apply the highlight to the last item and it works as expected. Later, when we add a new item, our highlight method fires, but it doesn't see the new item.</p> <p>2 Questions about this:</p> <ul> <li><p><strong>Main Question</strong>: Why doesn't the last item (Matt) get highlighted? In other words, why, after a new item has been added, does <code>childViews.length</code> still report the old value? Is there a better way to be doing this?</p></li> <li><p><strong>Secondary Question</strong>: Why does the observer on <code>childViews</code> fire twice when we add the new item? (3 times total: 1 on initial insert, 2 from addition of 1 new child item)</p></li> </ul> <hr /> <p><strong>Edit</strong>: I've adjusted the fiddle a little to better illustrate my needs. Notice the mixed content of the outerView (HTML + innerViews). Basically, my outerView needs to accept ANY content as children, not just an array/collection of views/data.</p> <p><strong>Edit 2</strong>: Further clarification: Manipulating those child views after the fact is a different story and can be accomplished either by working with the contents of <code>childViews</code> (ember views) or using jQuery to manipulate HTML elements that may not be a formal ember view object, or any other means. <em>The real goal here is simply to capture the event when ANY of the outerView content changes (with a current copy of childViews).</em></p> <p><strong>Edit 3</strong>: Here's an <a href="https://github.com/emberjs/ember.js/issues/2355" rel="nofollow">Issue on Github</a></p>
 

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