extourne suite annulation du don

models/donation.py

@@ -99,6 +99,48 @@ class DonationDonation(models.Model):
     )
     html_content_print=fields.Html('html content print')
     
+    def done2cancel(self):
+        """from Done state to Cancel state"""
+        for donation in self:
+            if donation.tax_receipt_id:
+                raise UserError(
+                    _(
+                        "You cannot cancel this donation because "
+                        "it is linked to the tax receipt %s. You should first "
+                        "delete this tax receipt (but it may not be legally "
+                        "allowed)."
+                    )
+                    % donation.tax_receipt_id.number
+                )
+            #if donation.move_id:
+                #donation.move_id.button_cancel()
+                #donation.move_id.unlink()
+            donation.write({"state": "cancel"})
+            donation.partner_id._update_donor_rank()
+            donation.reverse_accounting_entries()
+    
+    def reverse_accounting_entries(self):
+        move=self.env['account.move'].search([('id','=',int(self.move_id))])
+        #création de la pièce comptable d'extourne
+        vals={}
+        vals['ref']='Extourne de '+ move.name
+        vals['date']=datetime.now()
+        vals['journal_id']=int(move.journal_id)
+        vals['reversed_entry_id']=int(move.id)
+        move_r=self.env['account.move'].create(vals)
+        #création des écritures comptables d'extourne
+        for line in move.line_ids:
+            vals={}
+            vals['move_id']=int(move_r.id)
+            vals['partner_id']=int(line.partner_id)
+            vals['account_id']=int(line.account_id)
+            vals['debit']=line.credit
+            vals['credit']=line.debit
+            vals['quantity']=line.quantity
+            vals['date']=move_r.date
+            
+            line_r=self.env['account.move.line'].with_context(check_move_validity=False).create(vals)
+        move_r._post()
 
     def _compute_year_donation_date(self):
         for rec in self: