ExtJs 5 grid store/viewmodel binding: Cannot modify ext-empty-store - binding

Question

I'm pulling my hair out on this one...
I have a view with some grids, a store and a viewModel. I need different filtered versions of the store in different grids, so I'm trying to bind each filtered store to a grid. Now I can't even get a store to load in a grid in the first place...
Here's what my code looks like:
Store:
Ext.define('My.store.Admin.Kinder', {
extend: 'Ext.data.Store',
model: 'My.model.Kind',
storeId: 'adminKinderStore',
alias: 'store.adminKinder',
proxy: {
type: 'ajax',
method: 'post',
url: '/getKinder',
reader: {
type: 'json',
rootProperty: 'kinder'
}
}
});
ViewModel:
Ext.define('My.model.kindViewModel', {
extend: 'Ext.app.ViewModel',
alias: 'viewmodel.kindViewModel',
requires: [
'My.model.Kind',
'My.store.Admin.Kinder'
],
view: 'kindView',
stores: {
warteliste: {
type: 'adminKinder'
}
}
});
View:
Ext.define('My.view.Admin.kinder', {
extend: 'Ext.panel.Panel',
alias: 'widget.kindView',
id: 'kinder-panel',
requires: [
'My.view.Admin.kindController',
'My.model.kindViewModel'
],
controller: 'kind',
border: false,
maxWidth: 960,
session: My.session,
viewModel: {
type: 'kindViewModel'
},
initComponent: function() {
this.activeTab = 'warteliste-tab';
this.callParent();
},
items: [
{
xtype: 'grid',
id: 'warteliste-grid',
bind: {
store: '{warteliste}'
},
border: false,
margin: '0 0 20px 0',
selModel: {
allowDeselect: true
},
columns: [
// some grid columns
],
listeners: {
afterRender: function(grid) {
grid.store.load();
}
}
}]
});
I get an error message "Cannot modify ext-empty-store", which must mean that the store is not (yet) bound when store.load() is called in the afterRender listener.
Strange thing is, when I console.log the grid, the store is there. When I console.log grid.store, an empty store is returned.

Answer 1

I got the same issue in afterRender event and solved it by not getting the store from the grid like
grid.store.load();
but from the ViewModel (ViewController scope):
this.getViewModel().getStore('{warteliste}').load();

Answer 2

Check if the store is created as expected in viewmodel. Normally, we do not have store definition files in ./store directory but we place their configurations in viewmodel.
See an example of that here: http://extjs.eu/ext-examples/#bind-grid-form - MainModel::stores
The solution to your original problem
I need different filtered versions of the store in different grids
are chained stores.
See an example of how to implement them here: http://extjs.eu/on-chained-stores/

Answer 3

for me it was
myGrid.getViewModel().getStore('myStoreName').load();