Dynamic Model Manipulation

I was Googling around for best practices regarding model manipulation, and apparently, in 4.x, you had this function (setField, example here). But in 6.x, this seems to be gone. I

Solution 1:

You could try to dynamically define a model and then call store.setModel().

var starkStore = Ext.create('Ext.data.Store', {
    model: Ext.data.Model, // only here to suppress warning
});
var starkModel = Ext.define(Ext.getId(), {
    extend: 'Ext.data.Model',
    fields: ['id', 'first_name', 'last_name']
});

starkStore.setModel(starkModel);
starkStore.getProxy().getReader().setModel(starkModel);

starkStore.loadData([
    { id: 1, first_name: 'Rob', last_name: 'Stark' },
    { id: 2, first_name: 'John', last_name: 'Snow' },
    { id: 3, first_name: 'Rickon', last_name: 'Stark' },
    { id: 4, first_name: 'Bran', last_name: 'Stark' },
]);

Example on jsfiddle

The only issue here is that you need to have unique name for the dynamic model.