partner-contact/partner_email_unique/models/res_partner.py

# -*- coding: utf-8 -*-
# Copyright 2019 Coop IT Easy SCRL fs
#   Robin Keunen <robin@coopiteasy.be>
# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).

from openerp import models, api, _, fields
from openerp.exceptions import ValidationError
from openerp.tools import config


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

    email = fields.Char(copy=False)

    @api.multi
    @api.constrains('email')
    def _check_email(self):
        if config['test_enable'] and not self.env.context.get(
                'test_partner_email_unique'):
            return

        for partner in self:
            domain = [
                ('id', '!=', partner.id),
                ('email', '=', partner.email),
                ('email', '!=', False),
            ]
            other_partners = self.search(domain)

            # active_test is False when called from
            # base.partner.merge.automatic.wizard
            if other_partners and self.env.context.get("active_test", True):
                raise ValidationError(
                    _("This email is already set to partner '%s'")
                    % other_partners[0].display_name)