syncDirtyAndDestroyed() doesn't remove/clear ###_dirty in localStorage about backbone.dualstorage

[nilbus]

Check out Store.clean and the places where clean is called, in localsync update and delete. Once you figure out the scenario that creates this error condition, we can create a failing spec that reproduces it and fix the issue.

[Cinezaster]

If I run syncDirtyAndDestroyed(); should I pass through localsync function? Because it doesn't.

[nilbus]

Backbone.Collection.prototype.syncDirty = (options) ->
  store = localStorage.getItem("#{getStoreName(@)}_dirty")
  ids = (store and store.split(',')) or []

  for id in ids
    @get(id)?.save(null, options)

For each id marked dirty, it tries to get the model from the collection by that id. If a model with that id exists, it will try to save it. Save should call sync, which is overridden to be dualsync.

dualsync = (method, model, options) ->
  # ...

  # execute only online sync
  return onlineSync(method, model, options) if _.result(model, 'remote') or _.result(model.collection, 'remote')

  # execute dual sync
  # ...

If neither the model nor collection have a truthy remote property, then it will continue to try to dualsync. Double-check this.

As dualsync executes, localsync generally always gets called below backbone.dualstorage.coffee:283. Trace the execution to see what's actually happening.

[Cinezaster]

Got it. The response on the PUT call is empty, but status is 200. Backbone handles this as an error but since the error is never logged I didn't know the call was not successful. I fixed this by adding

  Backbone.ajax = function() {
    var args = Array.prototype.slice.call(arguments, 0);
    if (args[0].type === 'PUT') {
        args[0].dataType = "text";
    }
    return Backbone.$.ajax.apply(Backbone.$, args);
};```


This is not a bug in this library. A bit of error feedback would be nice.