# -*- coding: utf-8 -*-
from odoo.exceptions import ValidationError
from odoo import api, fields, models, _


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

    journal_id = fields.One2many('account.journal', 'bank_account_id', domain=[('type', '=', 'bank')], string='Account Journal', readonly=True,
        help="The accounting journal corresponding to this bank account.")

    @api.constrains('journal_id')
    def _check_journal_id(self):
        for bank in self:
            if len(bank.journal_id) > 1:
                raise ValidationError(_('A bank account can belong to only one journal.'))