Reuse invoice_cache when recreating sale.

This commit refs #21563

__init__.py

@@ -9,3 +9,7 @@ def register():
         load.LoadOrder,
         load.Sale,
         module='carrier_load_done2running', type_='model')
+    Pool.register(
+        load.LoadOrderProcessing2Confirmed,
+        module='carrier_load_done2running', type_='model',
+        depends=['sale_processing2confirmed'])

load.py

@@ -10,6 +10,7 @@ from trytond.i18n import gettext
 
 class LoadOrder(metaclass=PoolMeta):
     __name__ = 'carrier.load.order'
+    _sale_values_to_copy = {'number'}
 
     @classmethod
     def __setup__(cls):
@@ -24,14 +25,15 @@ class LoadOrder(metaclass=PoolMeta):
         })
 
     def _get_load_sale(self, Sale):
-        number = None
+        values = {}
         if self.sale and self.sale.state == 'cancelled' and \
                 self.sale.origin.__name__ == 'carrier.load.order':
-            number = self.sale.number
+            for value in self._sale_values_to_copy:
+                values[value] = getattr(self.sale, value, None)
             Sale.delete([self.sale])
         sale = super()._get_load_sale(Sale)
-        if number:
-            sale.number = number
+        for name, value in values.items():
+            setattr(sale, name, value)
         return sale
 
     def _get_shipment_out(self, sale):
@@ -138,3 +140,12 @@ class Sale(metaclass=PoolMeta):
             if not record.quoted:
                 record.quoted = True
                 record.save()
+
+
+class LoadOrderProcessing2Confirmed(metaclass=PoolMeta):
+    __name__ = 'carrier.load.order'
+
+    @classmethod
+    def __setup__(cls):
+        super().__setup__()
+        cls._sale_values_to_copy.add('invoice_cache')

tryton.cfg

@@ -6,6 +6,9 @@ depends:
   res
   stock_move_done2cancel
 
+extras_depend:
+  sale_processing2confirmed
+
 xml:
   load.xml
   message.xml