Knockback fails when model has attribute called 'url'

[patrick-radius]

Hi, i was just testing out kb to see if it is useful for our project.
But at the first try i got this weird issue.

when i have a backbone model with an attribute called url it fails with an undefined is not a function at line 1217 in knockback.js

The function in your code is: kb.getValue = function(model, key, args) {
        var _ref;
        if (!model) {
          return;
        }
        if (_.isFunction(model[key]) && ((_ref = kb.orm) != null ? _ref.useFunction(model, key) : void 0)) {
          return model[key]();
        }
        if (!args) {
          return model.get(key);
        }
        return model.get.apply(model, _.map([key].concat(args), function(value) {
          return kb.peek(value);
        }));
      };

I suspect it is related to the _ref.useFunction call.
I'm using Backbone Associations, but not in this particular model.
I also tried calling it like this (where m is the original model)

            this.view_model = kb.viewModel( new Backbone.Model(m.toJSON()) );

but it still fails, unless i call the url attribute something else.

[kmalakoff]

Hmmmm. I've never used an attribute called url. I can write a test for this case.

[kmalakoff]

I've fixed it in knockback 0.20.2. Happy coding!