Ext.define's override config throwing error

[grnadav]

Using Sencha Touch 2.0.0 I am trying to override a class's behaviour.
I am following these docs and this forum post on the subject
But with the following code:

Ext.define('MP.service.Override', {
override: 'Ext.Ajax',
request: function(cfg) {
console.log('overriden');
this.callOverridden(arguments);
}
});

I get this error in the console:

Uncaught TypeError: Object [object Object] has no method 'override'

Any help would be much appreciated

[mitchellsimoens]

Ext.Ajax is a singleton and Ext.define will not be able to override it. I'm going to open a bug to see if Ext.define will be allowed to override a singleton.

[Jamie Avins]

You should be able to override Ext.data.Connection which this derives from, or directly modify the Ext.Ajax instance. Overriding a singleton with a define seems a bit over engineered.

[badgerb1]

Hi guys,

Just like to ping the singleton override pattern here again.

I think you guys have come up with a GREAT way to increase functionality in the main framework, or to patch it between releases by allowing for overrides. I use them quite a bit to add or fix functionality on items that are instantiated within the framework but used outside.

I think it's pretty important especially for the patching mechanism that singletons are able to be overriden as well.

Thanks
Bob