DynamicModelReader.js

/**
 * A reader which is used to read polymorphic associations.
 * Implementors have to provide a getPolyModel function.
 */
Ext.define('Your.PolymorphicReader', {
	extend : 'Ext.data.reader.Json',
	extractData : function(root) {
		var me = this, values = [], records = [], tempModel, i = 0, length = root.length, node, id, record;

		if(!root.length && Ext.isObject(root)) {
			root = [root];
			length = 1;
		}

		for(; i < length; i++) {
			node = root[i];
			tempModel = me.getPolyModel(node);
			if(tempModel) {
				me.setModel(tempModel);
			} else {
				continue;
			}
			values = me.extractValues(node);
			id = me.getId(node);
			record = new tempModel(values, id, node);
			records.push(record);
			if(me.implicitIncludes) {
				me.readAssociated(record, node);
			}
		}
		return records;
	},
	root : 'data',
	totalProperty : 'total',
	successProperty : 'success'
});