saas-platform/frontend/saas-web/app/view/stock/make/FormPanelModel.js

Ext.define('saas.view.stock.make.FormPanelModel', {
    extend: 'saas.view.core.form.FormPanelModel',
    alias: 'viewmodel.stock-make-formpanel',

    formulas: {
        ma_qty_change: {
            bind: '{ma_qty}',
            get: function(v) {
                var viewModel = this.getView().getViewModel(),
                store = viewModel.get('detail0').detailStore,
                items  = store.getData().items,
                oneuseqty=0;
                Ext.Array.each(items, function(item, i) {
                    oneuseqty = item.get('mm_oneuseqty');
                    item.set('mm_qty', oneuseqty*v);               
                });
                return v;
            }
        }
    }

});