ExtJS 5.0.1 tagfield - forms

Question

Can anyone explain me, what am I doing wrong?
I'm trying to load data to store and select some of that on form load.
Here is what I came up with so far:
https://fiddle.sencha.com/#fiddle/cjd
Ext.define('TagModel', {
extend: 'Ext.data.Model',
fields: [{
name: 'some_id',
type: 'int'
}, {
name: 'some_value',
type: 'string'
}]
});
Ext.define('MyPanel',{
extend: 'Ext.panel.Panel',
renderTo: Ext.getBody(),
title: 'Some title',
width: 200,
heigh: 500,
layout: 'anchor',
items: [{
xtype: 'tagfield',
anchor: '100%',
displayField: 'some_value',
valueField: 'some_id',
store: Ext.create('Ext.data.Store', {
model: 'TagModel',
data: [{
some_id: 0,
some_value: 'value0'
}, {
some_id: 1,
some_value: 'value1'
}]
}),
// value: ['0']
}]
});
Ext.application({
name: 'Fiddle',
launch: function() {
Ext.create('MyPanel');
}
});
It works well, but if you uncomment line 40, which should tell component to select items by their valueField config, it shows error in the console:
Uncaught TypeError: Cannot read property 'isModel' of undefined ext-all-debug.js:144157
According to the specification, value can be set as an array of strings associated to this field's configured valueField.

Answer 1

As posted by the OP Панов Владимир:
OK, I've found a solution:
The problem is in the source code of ExtJS. If anyone have same problem, you can use this override:
Ext.override(Ext.form.field.Tag, {
findRecord: function(field, value) {
var store = this.store,
matches;
if (store) {
matches = store.queryBy(function(rec) {
return rec.get(field) === value;
});
}
return matches ? matches.getAt(0) : false;
},
});