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POBackbone .fetch() not updating collection with the latest data
 

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  1. POBackbone .fetch() not updating collection with the latest data
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    <p>I am attempting to update a filtered <code>video</code> collection when a <code>user</code> model makes a request to the server. The problem is in the <code>update</code> method. <code>fetch()</code> does not get the latest data for the <code>video</code> collection.</p> <p>What do I need to fix in <code>update</code> to get the latest data so the view re-renders properly?</p> <pre><code>var VideosView = Backbone.View.extend({ tagName: 'ul', id: 'video-list', initialize: function() { var user = this.model; var _videos = user.get('videos'); user_vids = videos.filter_videos(_videos); this.listenTo(user, 'request', this.update); }, render: function() { user_vids.each( this.addOne, this ); return this; }, addOne: function(video) { var videoView = new VideoView({ model: video }); this.$el.append( videoView.render().el ); }, update: function() { $('#video-list').empty(); _videos = this.model.get('videos'); videos.fetch(); user_vids = videos.filter_videos(_videos) user_vids.each( this.addOne, this ); } }); // Instantiate var videosView = new VideosView({ model: user, collection: videos }); $('#allVideos').append( videosView.render().el ); </code></pre> <p><strong>EDIT</strong></p> <p>Adding additional code:</p> <p>Here is where <code>videosView</code> is initialized.</p> <pre><code>var IndexView = Backbone.View.extend({ initialize: function() { user = this.model; }, render: function() { var videosView = new VideosView({ model: user, collection: videos }); $('#allVideos').append( videosView.render().el ); var addVideoView = new AddVideoView({ model: user, collection: videos }); $('#addVideo').append( addVideoView.render().el ); } }); </code></pre> <p>The <code>listenTo</code> in <code>VideoViews</code> is listening for what is happening in <code>add_to_user_array</code> in the <code>AddVideoView</code> here:</p> <pre><code>var AddVideoView = Backbone.View.extend({ tagName: 'div', template: _.template( AddVideoTemplate ), events: { 'click #videoSubmitButton': 'submit' }, initialize: function() { user = this.model; }, render: function() { var template = this.template(); this.$el.html(template); return this; }, submit: function(event) { event.preventDefault(); console.log('form submitted'); var vimeo_id = parseInt( $('#vimeo_id').val() ); var newVideo = {vimeo_id: vimeo_id}; this.collection.create(newVideo, {wait: true}); this.add_to_user_array(vimeo_id); }, add_to_user_array: function(vimeo_id) { var _videos = user.get('videos'); _videos.push(vimeo_id); user.save({videos: _videos}, {wait: true}); } }); </code></pre> <p>Inside the router I'm instantiating the model and collection:</p> <pre><code>index: function() { users = new Users; users.fetch({ success: function(user_data) { var user = user_data.findWhere({username: App.username}) videos = new Videos; videos.fetch({ success: function(video_data) { var indexView = new IndexView({ model: user, collection: videos }); var indexController = new IndexController; indexController.showView( indexView ); } }); } }) } </code></pre>
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    1. USEvan Emolo
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    1. COYou reference the variable videos a couple of times which looks to me like it must be undefined. Check your console for any errors. I think you probably need to replace those with this.collection. On top of that I think you need to pass a callback function to the collection fetch method.
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    2. COThanks, but there are no errors or undefined errors. The data is simply stale.
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      1. USEvan Emolo
    3. CO`var _videos` is scoped inside the `initialize` method . And you are trying to access it again inside update. Can you show the whole code instead of a partial view so that we can understand where exactly the problem is
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      1. USSushanth --
 

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