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POUncaught TypeError: Cannot call method 'on' of undefined - Backbone.js
 

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  1. POUncaught TypeError: Cannot call method 'on' of undefined - Backbone.js
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    <p>I'm having some error in my app and don't know why.</p> <pre><code>Uncaught TypeError: Cannot call method 'on' of undefined </code></pre> <p>It happens on my collection view, follow the code:</p> <pre><code>App.WorkoutsView = Backbone.View.extend({ initialize: function(){ this.collection.on('add', this.addOne, this); this.collection.on('reset', this.addAll, this); }, render: function() { this.addAll(); return this; }, addAll: function() { this.$el.empty(); this.collection.forEach(this.addOne, this); }, addOne: function(Workout) { var workoutView = new App.WorkoutView({model: App.Workout}); this.$el.append(workoutView.render().el); } }); </code></pre> <p>the problem is on:</p> <pre><code>this.collection.on('add', this.addOne, this); </code></pre> <p>Anyone knows why?</p> <p>** Edit: Collection code **</p> <pre><code>App.WorkoutItems = Backbone.Collection.extend({ model: App.Workout, url: '/workouts', localStorage: function() {new Backbone.LocalStorage('Workout')}, initialize: function() { this.on('remove', this.hideWorkout, this); }, hideWorkout: function() { model.trigger('hide'); }, focusOnWorkoutItem: function() { var modelsToRemove = this.filter(function(workoutItem) { return workoutItem.id != id; }); this.remove(modelsToRemove); } }); </code></pre> <p><strong>Edit: my Router code where i'm instantiating WorkoutsView:</strong></p> <pre><code>App.Router = Backbone.Router.extend({ routes: { '':'index' }, initialize: function() { this.workoutItems = new App.WorkoutItems(); this.workoutsView = new App.WorkoutsView(); this.workoutsView.render(); }, index: function() { $('#workouts').html(this.workoutsView.el); this.workoutsItem.fetch(); } }); new App.Router; Backbone.history.start(); </code></pre>
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    1. This table or related slice is empty.
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    1. USGuilherme Carlos
    1. USGuilherme Carlos
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. POUncaught TypeError: Cannot call method 'on' of undefined - Backbone.js
      1. This table or related slice is empty.
      1. VTUpMod
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      1. POUncaught TypeError: Cannot call method 'on' of undefined - Backbone.js
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
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      1. POUncaught TypeError: Cannot call method 'on' of undefined - Backbone.js
      1. This table or related slice is empty.
      1. VTUpMod
    1. COWhat exactly is `this.collection`?
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      1. POUncaught TypeError: Cannot call method 'on' of undefined - Backbone.js
      1. USDanilo Valente
    2. COCan you show the code you're using to instantiate the view?
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      1. POUncaught TypeError: Cannot call method 'on' of undefined - Backbone.js
      1. USnet.uk.sweet
    3. CO@MarkLinus Workout collection, i will add the code
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      1. POUncaught TypeError: Cannot call method 'on' of undefined - Backbone.js
      1. USGuilherme Carlos
 

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