Model.setProxy() causes wrong destroy method to be invoked

[jlindbergh]

Ext version tested:

• Sencha Touch 2.1.0

Browser versions tested against:

• Chrome 24

DOCTYPE tested against:

• html

Description:

• Using setProxy() on a model instance which already has a proxy set, causes a TypeError "cannot call method 'getRecords'/'getParams' of undefined.
  This is probably because Model.applyProxy() causes Ext.factory() to try to destroy the old proxy instance. But since proxy has a method destroy(operation, callback, scope) it calls that instead, where operation is a required parameter..

Steps to reproduce the problem:

• Create a model instance
• set a proxy on the instance via setProxy()
• set another proxy on the model instance via setProxy()
• The second setProxy call will throw an exception

The result that was expected:

• new proxy was set

The result that occurs instead:

• TypeError "cannot call method 'getRecords'/'getParams' of undefined.

Test Case:

store = Ext.getStore(theStoreType);
model = Ext.ModelManager.getModel("MyModel");
model.setProxy(store.getProxy());

HELPFUL INFORMATION

An old thread regarding this bug http://www.sencha.com/forum/showthread.php?242558-Changing-proxy-leads-to-calling-the-wrong-destroy-method

Debugging already done:

• see above analysis

Possible fix:

• not provided

Operating System:

• Ubuntu 11.10

[mitchellsimoens]

This is working for me on 2.1.0

Ext.define('MyModel', {
    extend : 'Ext.data.Model',

    config : {
        fields : ['test'],

        proxy : {
            type : 'ajax',
            url  : 'data/json.json'
        }
    }
});

console.log(MyModel.getProxy().getUrl());

MyModel.setProxy({
    type : 'ajax',
    url  : 'data/json2.json'
});

console.log(MyModel.getProxy().getUrl());

[jlindbergh]

Thanks for your answer, and sorry for the very brief "test case" I provided..

However, in my case the current model has no proxy on the first run and that's what causing the "nullpointerexception". This updated example won't work:

Ext.define('MyModel', {
    extend : 'Ext.data.Model',
    config : {
        fields : ['test']
   }
});

console.log(MyModel.getProxy().getUrl());

MyModel.setProxy({
   type : 'ajax',
    url  : 'data/json2.json'
});

console.log(MyModel.getProxy().getUrl());

Short background: I have implemented the use of a Rest-proxy in a store, using the proxy.rest-docs as a reference. I have defined the rest proxy in my stores and all CRUD operations are working great, except Read. When I want to load a single model instance from the server using the example code (see Ext.data.proxy.Rest docs) I realized that I had to set the proxy on the model too. And it was when I did that I stumbled upon this bug(?).

I'd be grateful for another look at this.

[jlindbergh]

Do I have to change the [NOREPRO]-tag to get another look at this, and in that case: how do I change it?

Thanks,
/J

[Vino999]

I get this error in Sencha 2.2.0.

Same thing. When I give a model/record the second time the same proxy with record/model.setProxy(X) I get
Uncaught TypeError: Cannot call method 'getParams' of undefined

Is there a way to fix this?

[Vino999]

I get this error in Sencha 2.2.0.

Same thing. When I give a model/record the second time the same proxy with record/model.setProxy(X) I get
Uncaught TypeError: Cannot call method 'getParams' of undefined

Is there a way to fix this?

These guys have all the same problems
http://www.sencha.com/forum/showthread.php?242558

http://www.sencha.com/forum/showthread.php?237881-Resetting-store-s-Proxy-from-localStorage-to-AjaxProxy&

http://www.sencha.com/forum/showthre...oblem&langid=4

[jlindbergh]

My workaround was to override applyProxy in my Model as follows

    applyProxy: function(proxy, currentProxy) {
        return Ext.factory(proxy, Ext.data.Proxy, null, 'proxy');
    }