javascript - How to filter from a combobox in Sencha-touch? -

i trying filter in combobox under sencha touch framework not loading correct records in list.

my code is:

ontemplatesfilterchoosen: function(field, newvalue, oldvalue){   var store = ext.getstore('customers'),         templatesstore = store.getat(0).templates(), //get associated store         text = field.getrecord().data.text;     templatesstore.clearfilter(); //here code filter main store based in records of associated store } 

but not working correctly , store.getcount()for example 0, showing empty list.

in main model adding new model based in properties of filter called "customertemplatemodel"

associations: [         {             type: 'hasmany',             associatedmodel: 'x.customer.model.customertemplatemodel',             ownermodel: 'x.customer.model.customermodel',             associationkey: 'templates',             autoload: true,             filterproperty: 'value',             name: 'templates'         }     ] 

and here model associated:

   ext.define('x.customer.model.customertemplatemodel', {     extend: 'ext.data.model',     requires:[     ],     config: {         usecache: false,         rootproperty: 'templates',         fields: [             {                 name: 'text',                 type: 'string'             },             {                 name: 'value',                 type: 'string'             }         ]     } }); 

what doing wrong??

thank in advance.