account-financial-tools/account_invoice_constraint_chronology/model/account.py

# -*- coding: utf-8 -*-
# Copyright 2015-2017 ACSONE SA/NV (<http://acsone.eu>)
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).

from odoo import models, fields, api


class AccountJournal(models.Model):
    _inherit = ['account.journal']

    check_chronology = fields.Boolean(string='Check Chronology', default=False)

    @api.multi
    @api.onchange('type')
    def on_change_type(self):
        for rec in self:
            if rec.type not in ['sale', 'purchase']:
                rec.check_chronology = False
            return True