Marionette's Take on the Undead: Zombie Perspectives

Error in JS Console:

Uncaught ViewDestroyedError: View (cid: "view351") has already been destroyed and cannot be used. backbone.marionette.js?body=1:1715

Code Snippet:

initialize: (options) ->
  HWAs = @model.get('homework_assignments')
  @collection = new App.Collections.HomeworkAssignments(HWAs)
  @collection.on "sync", =>
    @render()
  @collection.fetch()

Zombie views are appearing when following these steps:

  1. Visit the page with the code above
  2. Navigate back using the browser's back button
  3. Click on a link leading to the view containing the code above

Can anyone suggest a solution for this issue?

javascriptbackbone.jsmarionette

Answer №1

There isn't much code provided, but based on what's there, it seems like the issue lies in how the collection is bound to the view class.

Each time a view of this class is instantiated, the collection is bound to it. However, when a view of this class is destroyed, the binding to @collection is not properly cleaned up. This results in the sync function trying to call refresh on instances of the view that may no longer be valid due to re-rendering of parent elements or other factors.

A possible solution would be to add a cleanup function in the view:

onBeforeClose: () ->
    @collection.off("sync", @render())

You may also need to adjust the sync function syntax as follows:

@collection.on("sync", @render())

It's uncertain if Backbone will interpret an anonymous function calling @render() the same way as the @render() function itself. In any case, using an anonymous function for such calls adds unnecessary complexity.

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