Same problem here :
'sale_order_id': fields.many2one('sale.order', 'Sale Order', on_delete='cascade', readonly=True),
constraints are not generated. This is a serious problem and should not be listed as 'wishlist'.
Same problem here :
'sale_order_id': fields. many2one( 'sale.order' , 'Sale Order', on_delete= 'cascade' , readonly=True),
constraints are not generated. This is a serious problem and should not be listed as 'wishlist'.