Cascading Combobox in extjs

Question

I want to do cascading combobox in extjs. I have to comboboxes

Course combobox

{ 
    xtype : \'combobox\',  
    emptyText : \'         


        

Answer 1

It looks like you want to clear the filter you already applied. To remove filters that have been applied there is a clearFilter() method available on the store. You can mix that into your code similar to this:

comboModule.clearValue();  
// new line to clear any filter applied to the store
comboModule.getStore().clearFilter(true);  
comboModule.getStore().filter('courseId',combo.getValue());