my post requires is fallen, cause DB need yyyy-mm-dd format. But datepickerfield has mm-dd-yyyy. format config doesn't work:
..,{
xtype: 'datepickerfield',
destroyPickerOnHide: true,
format: 'Y-m-d',
value: new Date(),
label: 'Start date',
name: 'use_start'
},..
How to change dataformat?
The first solution is to convert you'r date before sending it like this :
Ext.Date.format(DATE_VAR, DATE_FORMAT);
List of format : https://docs.sencha.com/extjs/6.6.0/modern/Ext.Date.html
Another solution is to override the default date like this into you'r application constructor :
Ext.apply(Ext.util.Format, {
defaultDateFormat: DATE_FORMAT
})