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# -*- coding: utf-8 -*-
# Copyright 2017 Tecnativa - Pedro M. Baeza
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
from odoo import _, exceptions, models
class MailMassMailingList(models.Model):
_inherit = "mail.mass_mailing"
def button_draft(self):
"""Return to draft state for resending the mass mailing."""
if any(self.mapped(lambda x: x.state != 'done')):
raise exceptions.UserError(
_("You can't resend a mass mailing that is being sent or in "
"draft state.")
)
self.write({'state': 'draft'})