ComboBox, queryMode remote, prevent Store caching

[martin.povolny]

Hallo.

I have comboboxes, that allow the user to enter towns, there are too many towns so I use queryMode remote and as the user types, the combo gets loaded.

The problem: when I have multiple combos of this type on one page, the stores are shared and if the user types "Ab" in 1st combo, the Store gets loaded with towns starting with "Ab", user selects "Abba" and goes on to filling the form.

Then the user types "Ba" in the 2nd combo and the Store gets loaded with towns starting with "Ba".

But at the moment the store loads, the 1st combo becomes invalid - the selection is 1st combo: "Abba" does not match anything in the shared Store and the value disapears.

How do I prevent sharing the store by multiple comboboxes of the same type in one page?

The model is still the same, the combo is the same except for ItemId. But I need separate stores.

Thanks in advance!

[mitchellsimoens]

You then need to create a new store instance for each combo.

[martin.povolny]

You are right I accidently used the same store. Thank you.

That is because I have the combobox in a panel together with some more elements all wrapped in a class and I am probably not using the right idiom for such job.

I have moved the combobox creation into the constructor as shown below:

Ext.define('Ext.ux.ExSubPanel', {
    extend: 'Ext.form.Panel',
    alias:  'ex_sub_panel',


    frame: false,
    layout: {
        type:  'hbox',
        align: 'stretch'
    },
    items: [
      { itemId: 'btn_add', xtype: 'button', text: '+' }, 
      { itemId: 'btn_rem', xtype: 'button', text: '-' },


      { itemId: 'ex_text', flex: 2, xtype: 'textfield' },
/*
      HERE WAS THE COMBO
 */
      { itemId: 'ex_loc_pozn', flex: 1, xtype: 'textfield' },
    ],

   injectObec: function {
        this.insert( 3, {          
          xtype:  'combobox',
          itemId: 'ex_loc',  
          flex:   2,
          ETC.... HERE I HAVE THE COMBO NOW
           ....
          store: Ext.create( 'Ext.data.Store', {
              model: 'Obec',
              proxy:  {
                  type: 'ajax',
                  url:  '/obec/ext_search/',
            .... ETC
     } );
   },

   /* .. more functions here... */

    constructor: function(config) {
        this.callParent(arguments);
        this.initConfig(config);


        this.injectObec(); // here I call the function to insert the combo instead of defining it in the items
        
        return this;
    },
});

This solved the problem for me. But I don't like the organisation of the resulting code.

How can this be done better?

Thanks and regards.

[skirtle]

You can do it by specifying the store as a config rather than using Ext.create:

{
    xtype:  'combobox',
    ...
    store: {
        model: 'Obec',
        ...
    }
}

Note also that you have a stray comma in your items array, IE won't like that.

[martin.povolny]

Oh, I see, there is some magic in the ComboBox, that converts a hash passed in 'store' config to an instance of Store. I did not know that, thought it's my job to pass a Store.

This way I can use the items in my class.

Great, thank you!


btw: I was searching for a way to have custom rendered items in the drop-down as I used to have in ExtJS 2.

This works for me:

{
          xtype: 'combobox',
          .....
          tpl: new Ext.XTemplate( 
                 '<tpl for=".">',
                 '<li role="option" class="x-boundlist-item"><h4>{obec} {obec_id}</h4> {okres}, <i>{kraj} kraj</i></li>',
                 '</tpl>' ),
           ...
}