title: IDPROPERTY IN STORES FOR COMBINED ID's
body: <p>i will change my question. How do i set a combined id table(i mean a table with 2 columns as a primary key) as IDPROPERTY in a Model definition.</p>
  
  <p>I'm Using Sencha Extjs 4.2.1.</p>
  
  <p>Thank you in advance</p>