I would like to update the quantity field whenever user select the order line
I try to update the field using the last line,
select: function() {
$('tr.selected').removeClass('selected');
this.$element.addClass('selected');
this.order.selected = this.model;
this.on_selected();
this.order.selected.set('quantity', '123');
},
but I received this error.
TypeError: invalid 'in' operand attrs