server-tools/auth_user_case_insensitive/models/res_users.py

# -*- coding: utf-8 -*-
# Copyright 2015-2017 LasLabs Inc.
# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).

from odoo import api, fields, models


class ResUsers(models.Model):

    _inherit = 'res.users'

    login = fields.Char(
        help='Used to log into the system. Case insensitive.',
    )

    @classmethod
    def _login(cls, db, login, password):
        """ Overload _login to lowercase the `login` before passing to the
        super """
        login = login.lower()
        return super(ResUsers, cls)._login(db, login, password)

    @api.model
    def create(self, vals):
        """ Overload create to lowercase login """
        vals['login'] = vals.get('login', '').lower()
        return super(ResUsers, self).create(vals)

    @api.multi
    def write(self, vals):
        """ Overload write to lowercase login """
        if vals.get('login'):
            vals['login'] = vals['login'].lower()
        return super(ResUsers, self).write(vals)