Related field not working - Odoo v9 community

Question

I've inherited res.partner and added two fields to it.

class Partner(models.Model):
    _inherit = 'res.partner'

    type = fields.Selection(selection_add=[(('mina', 'Mina'))])
    origen = fields.Char(string="Origen")
    destino = fields.Char(string="Destino")

I want show these fields, on another model, like this:

class routes(models.Model):
    _name = 'routes'

    partner = fields.Many2one('res.partner')
    orig_ = fields.Char(related="partner.origen", string="Origen", store=True)
    dest_ = fields.Char(related="partner.destino", string="Destino", store=True)

These fields are being showed on form view, but they doesn't let me select anything, it's just a Char type field, like its not related, what could it be the reason?

Answer 1

Related fields are readonly fields, that's why you cannot edit them. If you want to edit them, just use normal Char field. If you want these fields have default values, use default attribute

orig_ = fields.Char(string="Origen", default=lambda self: self.partner.origen)
dest_ = fields.Char(string="Destino", default=lambda self: self.partner.destino)