Bind formula for changes in store

Question

I am have formula and want execute it when store in this viewModel is changeData.

When I do this, the formula does not work when data in store changed

stores: {

    currentStore: {
        extend: 'Ext.store.MyStore',
        trackRemoved: false
    },
    },
    formulas: {

    'executeWhenStoreChange': {
        bind: '{currentStore}',

        get: function () {
           console.log('store change')
    },

Answer 1

If you're looking to fire a function when data changed I would use a datachanged listener to the store(s) you want the event to fire on.

    currentStore: {
        listeners: {
            datachanged: function(store, eOpts) {
                console.log('store change');
            }
        }
    },

If you want it for all stores just reference the function in each datachanged listener

    currentStoreA: {
        listeners: {
            datachanged: 'onStoreDataChangeD'
        }
    },
    currentStoreB: {
        listeners: {
            datachanged: 'onStoreDataChangeD'
        }
    },

Then in the view controller:

    onStoreDataChangeD: function(store, eOpts) {
    console.log('store changed');
}