Hi Grf,

You can achieve the recordset from the picking id passed to the functions using the orm search/ browse function.

def some_method(self, picking_id):
    if picking_id:
        picking_id = self.env['stock.picking'].browse(picking_id)
        print(picking_id.name)

If you can't directly accept the picking_id and recordset itself, add a try catch statement so that if the recordset is passed as the arguement it'll be accessed as such and of its the picking id itself the orm method will be called.

Eg:

def some_method(self, picking_id):
    if picking_id:
        try:
                print(picking_id.name)
                # will return error if the picking_id is not a recordset and the exception case will be run in which the recordset will be fetched from the picking_id
            except:
                picking_id = self.env['stock.picking'].browse(picking_id)

Regards