Ext JS 6.2.0 localization overrides don't work - extjs

Question

I'm working on Ext JS MVC app, that needs to be localized. Trying to reproduce official docs (http://docs.sencha.com/extjs/6.2.0/guides/core_concepts/localization.html).
Locale file load correctly.
Console message:
[W] Overriding existing mapping: 'viewmodel.users' From
'clt.locale.en.view.users.UsersModel' to 'clt.view.users.UsersModel'.
Is this intentional?
but overriding values don't display (they should be grid columns headers.
Model looks like this:
Ext.define('clt.view.users.UsersModel', {
extend: 'Ext.app.ViewModel',
requires:[
// something
],
// singleton: true,
data: {
key1: 'value1',
key2: 'value2',
keyN: 'valueN',
},
stores: {
// something
}
});
Values binding to view like this:
bind: { text: '{key1}' }
If I make this model singleton, localization starts working (grid headers displayed localized values), but grid data is empty.
So, what's the problem? Help me understanding it.
Update. Problem resolved. I found thread on Sencha forum with solution: add localized elements in config object in localization file. Example:
Ext.define('clt.locale.en.view.users.UsersModel', {
override: 'clt.view.users.UsersModel',
config: {
data: {
key1: 'value1',
// some other keys
}
}
});

Answer 1

Warnings are not a good sign. In your case, you don't apply an override like you should. The message
[W] Overriding existing mapping: 'viewmodel.users' From 'clt.locale.en.view.users.UsersModel' to 'clt.view.users.UsersModel'. Is this intentional?
says that first, clt.locale.en.view.users.UsersModel (your localized version) is loaded, and after that, clt.view.users.UsersModel (non-localized version) is loaded and completely replaces the localized version.
What you want to do is the following:
Ext.define('clt.view.users.UsersModel', {
extend: 'Ext.app.ViewModel', // <- EXTEND ViewModel class
// define your locale-agnostic user model here
});
Ext.define('clt.locale.en.view.users.UsersModel', {
override: 'clt.view.users.UsersModel', // <- OVERRIDE implementation in the overridden class
// define your localized properties here.
});
This should remove the warning. Then you can instantiate the UsersModel
Ext.create('clt.view.users.UsersModel', {
but you get a localized version of it.