treestore / model override isLeaf implementation

[mdissel]

How can i override the isLeaf() implementation? This is my model

Ext.define('Item', {
	extend: 'Ext.data.Model',
    fields: [
		'name', 
		'itemCode',
		'url',
		'siteURL',
		'category',
		'client',
		{name:'userName', mapping:'user > userName', type:'string'}
	],
	isLeaf:function(){
		return Ext.isEmpty(this.get('category')) && Ext.isEmpty(this.get('userName'));
	}
});

but the isLeaf function is never called.. I can't change the server side response. How can i map fieldvalues from my server side response into the defaults node fields?

Thanks

[bseddon]

Good question. Did you ever work out how to have the isLeaf function return an appropriate value?

[bseddon]

Figured it out for my scenario. It was necessary to make sure the JSON response includes an appropriate boolean value for a 'leaf' property and to make sure the model definition for the 'leaf' field is marked as boolean. Then, for me at least, the model's isLeaf() function then just worked.