How to override the unlink method of 'res.partner' model? Odoo 14

Question

I want to remove the condition that generates the UserError in unlink method of 'res.partner' model:

def unlink(self):
    running_sessions = self.env['pos.session'].sudo().search([('state', '!=', 'closed')])
    if running_sessions:
        raise UserError(
            _("You cannot delete contacts while there are active PoS sessions. Close the session(s) %s first.")
            % ", ".join(session.name for session in running_sessions)
        )
    return super(ResPartner, self).unlink()
    
    

I try by this code , but it always execute the standard function :

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


    def unlink(self):
        running_sessions = self.env['pos.session'].sudo().search(
    [('state', 'not in', ['opening_control', 'opened', 'closing_control', 'closed'])])
        if running_sessions:
            raise UserError(
        _("You cannot delete contacts while there are active PoS sessions. Close the session(s) %s first.")
        % ", ".join(session.name for session in running_sessions)
    )
        else:
            return ResPartner.unlink(self)

How can I do it ? Any help please?

Answer 1

Your code here is correct

I try by this code , but it always execute the standard function :

class ResPartner(models.Model):
    _inherit = 'res.partner'
      def unlink(self):
            return super(ResPartner, self).unlink()

And you ask it to execute the standard method.

--- Edit ---

After re-reading question, I understood that you want to overwrite integrity check that point of sale module implements. This isn't good idea. You should obey that restriction. There is a good reason for that.

Instead, mark partner inactive or add a column to mark partner to be removed when conditions allows you to do it.

for example

class ResPartner(models.Model):
    _inherit = 'res.partner'
    remove_me = fields.Boolean('Marked for removal')
    def unlink(self):
        try:
          return super(ResPartner, self).unlink()
        except UserError:
          # If partner cannot be removed mark it as inactive and for removal
          self.remove_me = True
          self.active = False

And then create some scheduled action to remove partners marked for removal. Or leave them in database as inactive. You cannot remove a res.partner object anyway if there is any other object which has reference to it. And removing data from ERP systems is always a bit suspicious.

Answer 2

You can use @api.model annotation and the super method.

That's all, you can find example if search for @api.model in original odoo directory

Answer 3

Try below example of code to replace unlink method of specific file.

from odoo.addons.point_of_sale.models.res_partner import ResPartner

def unlink(self):
    running_sessions = self.env['pos.session'].sudo().search([('state', '!=', 'closed')])
    if running_sessions:
        pass
    return super(ResPartner, self).unlink()

ResPartner.unlink = unlink