How to declare this new many2one field with condition?

Question

Hello all,
In the stock.picking model, I want to declare a new field (customer_of_division_id).
If the stock.picking has a value in his sale_id field, I would want to declare the field like this :
customer_of_division_id = fields.Many2one(*related="sale_id.customer_of_division_id"*,
domain="[('division_of_company_id','=',company_id)]",
string='Customer of the division')
If the stock.picking has NO value in his sale_id field, I would want to declare the field like this :
customer_of_division_id =

Akhil P Sivan · Accepted Answer

Hi,
I think you may use a compute Many2one field.
For eg:
customer_of_division_id = fields.Many2one(compute='_get_division_id', comodel_name='res.partner', string='Customer of the division', store=True)
@api.depends('sale_id','partner_id')
def _get_division_id(self):
if self.sale_id:
self.customer_of_division_id = self.sale_id.customer_of_division_id.id
elif self.partner_id:
self.customer_of_division_id = self.partner_id.customer_of_division_id.id

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