this.webSocket = new WebSocket(this.consumer.url);
when i ran my project i received this error on this line in file action_cable.self please ask for any further code if needed.
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1`this.consumer.url` is `undefined` – PitaJ Apr 19 '16 at 17:24
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i am following this [link](https://medium.com/@dhh/rails-5-action-cable-demo-8bba4ccfc55e#.jqcehn3ac) tutorial. u can see he also didn't define it – Ferhan Nasim Apr 19 '16 at 17:46