Add mass backtodraft wizard on account.move

account_usability/wizard/account_move_backtodraft.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 Akretion France (http://www.akretion.com/)
+# @author: Alexis de Lattre <alexis.delattre@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import models, _
+from odoo.exceptions import UserError
+
+
+class AccountMoveBacktodraft(models.TransientModel):
+    _name = 'account.move.backtodraft'
+    _description = 'Account Move Unpost'
+
+    def backtodraft(self):
+        assert self._context.get('active_model') == 'account.move'
+        amo = self.env['account.move']
+        moves = amo.browse(self._context.get('active_ids'))
+        moves_backtodraft = moves.filtered(lambda x: x.state == 'posted')
+        if not moves_backtodraft:
+            raise UserError(_(
+                'There is no journal items in posted state to unpost.'))
+        moves_backtodraft.button_cancel()
+        return True