how to define domain syntax that has a value same as your custome field ? , for example i have this code :
_columns = {
'invoice_id': fields.many2one('account.invoice',string='Invoice',domain=[('state','=','paid'),('type','=','out_invoice')],required=True),
'no_sales_id': fields.many2one('account.invoice.line', domain=[('number','=','invoice_id')],string='Order Line', required=True),
}
'number' is fieldname reference in customer invoice
thank you,