Hello!
I'm working on a ticket reservation and selling system based on tryton 3.8.
As discussed with pokoli on #tryton, my model is quite special because i
have two one2many-relations towards ticket.ticket (one from
ticket.reservation and one from ticket.sale).
The goal was to get all tickets of a reservation into a sale with the
following on_change function (the number of tickets in the system should be
kept constant). The problem is, that with this piece of code the number of
reserved ticket is newly created, so if i select a reservation with tickets
id:162 and id:163 it creates me two new empty tickets instead of updating
the reserved ones...
Here is the code:
class Ticketsale(ModelSQL, ModelView):
"""
Ticket sale
"""
__name__ = 'ticket.sale'
receipt_number = fields.Char('Receipt number', readonly=True,
select=True)
pos_create_date = fields.DateTime('Create date', readonly=True)
reservation = fields.Many2One('ticket.reservation', 'Reservation')
voucher = fields.Many2One('ticket.voucher', 'Voucher')
tickets = fields.One2Many('ticket.ticket', 'sale', "Tickets")
@fields.depends('reservation','tickets')
def on_change_reservation(self):
if self.reservation:
tkts = list(self.tickets)
for t in self.reservation.tickets:
tkts.append(t)
self.tickets = tuple(tkts)
I already found another solution with the use of a button. Just wanted to
know (btw pokoli too) if the behaviour of tryton is correct in that (indeed
very special and uncommon) case.
Kind regards,
Clemens Hupka.
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