account_journal.py

# © 2019 Eficent Business and IT Consulting Services S.L.
# © 2019 Serpent Consulting Services Pvt. Ltd.
# License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl.html).

from odoo import api, fields, models, _
from odoo.exceptions import UserError


class AccountJournal(models.Model):
    _inherit = "account.journal"

    operating_unit_id = fields.Many2one(
        comodel_name='operating.unit',
        string='Operating Unit',
        domain="[('user_ids', '=', uid)]",
        help="Operating Unit that will be used in payments, "
             "when this journal is used.")

    @api.multi
    @api.constrains('type')
    def _check_ou(self):
        for journal in self:
            if journal.type in ('bank', 'cash') \
                    and journal.company_id.ou_is_self_balanced \
                    and not journal.operating_unit_id:
                raise UserError(_('Configuration error. If defined as '
                                  'self-balanced at company level, the '
                                  'operating unit is mandatory in bank '
                                  'journal.'))