[12.0][ADD] account_document_reversal

account_document_reversal/models/account_invoice.py

@@ -0,0 +1,52 @@
+# Copyright 2019 Ecosoft Co., Ltd (http://ecosoft.co.th/)
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html)
+from odoo import api, models, _
+from odoo.exceptions import ValidationError, UserError
+
+
+class AccountInvoice(models.Model):
+    _name = 'account.invoice'
+    _inherit = ['account.invoice', 'account.document.reversal']
+
+    @api.multi
+    def action_invoice_cancel(self):
+        """ If cancel method is to reverse, use document reversal wizard
+        * Draft invoice, fall back to standard invoice cancel
+        * Non draft, must be fully open (not even partial reconciled) to cancel
+        """
+        cancel_reversal = all(self.mapped('journal_id.is_cancel_reversal'))
+        states = self.mapped('state')
+        if cancel_reversal and 'draft' not in states:
+            if not all(st == 'open' for st in states) or \
+                    (self.mapped('move_id.line_ids.matched_debit_ids') |
+                     self.mapped('move_id.line_ids.matched_credit_ids')):
+                raise UserError(
+                    _('Only fully unpaid invoice can be cancelled.\n'
+                      'To cancel this invoice, make sure all payment(s) '
+                      'are also cancelled.'))
+            return self.reverse_document_wizard()
+        return super().action_invoice_cancel()
+
+    @api.multi
+    def action_document_reversal(self, date=None, journal_id=None):
+        """ Reverse all moves related to this invoice + set state to cancel """
+        # Check document state
+        if 'cancel' in self.mapped('state'):
+            raise ValidationError(
+                _('You are trying to cancel the cancelled document'))
+        MoveLine = self.env['account.move.line']
+        move_lines = MoveLine.search([('invoice_id', 'in', self.ids)])
+        moves = move_lines.mapped('move_id')
+        # Set all moves to unreconciled
+        move_lines.filtered(lambda x:
+                            x.account_id.reconcile).remove_move_reconcile()
+        # Important to remove relation with move.line before reverse
+        move_lines.write({'invoice_id': False})
+        # Create reverse entries
+        moves.reverse_moves(date, journal_id)
+        # Set state cancelled and unlink with account.move
+        self.write({'move_id': False,
+                    'move_name': False,
+                    'reference': False,
+                    'state': 'cancel'})
+        return True