[FIX] Fixed Issue #440 (when calling Scheduled Actions)

contract_sale_invoicing/models/contract.py

@@ -16,16 +16,18 @@ class ContractContract(models.Model):
     @api.multi
     def _recurring_create_invoice(self, date_ref=False):
         invoices = super()._recurring_create_invoice(date_ref)
-        if not self.invoicing_sales:
+        for rec in self:
+            if not rec.invoicing_sales:
                 return invoices
             sales = self.env['sale.order'].search([
-            ('analytic_account_id', '=', self.group_id.id),
+                ('analytic_account_id', '=', rec.group_id.id),
                 ('partner_invoice_id', 'child_of',
-             self.partner_id.commercial_partner_id.ids),
+                 rec.partner_id.commercial_partner_id.ids),
                 ('invoice_status', '=', 'to invoice'),
                 ('date_order', '<=',
-             '{} 23:59:59'.format(self.recurring_next_date)),
+                 '{} 23:59:59'.format(rec.recurring_next_date)),
             ])
             if sales:
                 invoice_ids = sales.action_invoice_create()
                 invoices |= self.env['account.invoice'].browse(invoice_ids)[:1]
+        return invoices

contract_sale_invoicing/tests/test_contract_sale_invoicing.py

@@ -45,3 +45,10 @@ class TestContractSaleInvoicing(TestContractBase):
         self.sale_order.action_confirm()
         self.contract.recurring_create_invoice()
         self.assertEqual(self.sale_order.invoice_status, 'to invoice')
+
+    def test_multi_contract_recurring_create_invoice(self):
+        self.contract.copy()
+        self.contract.copy()
+        self.contract.copy()
+        self.contract.copy()
+        self.env['contract.contract'].cron_recurring_create_invoice()