Fix

folio.py

@@ -173,8 +173,8 @@ class Folio(ModelSQL, ModelView):
         return sum(res)
 
     def get_rec_name(self, name=None):
-        if self.registration_card:
+        if self.room:
-            name = f'{self.registration_card}:'
+            name = f'{self.room.code}:'
         if self.main_guest:
             name = name + self.main_guest.name
         return name

invoice.py

@@ -27,6 +27,7 @@ class Invoice(metaclass=PoolMeta):
                 for voucher in booking.vouchers:
                     if invoice.party.id == voucher.party.id:
                         vouchers.append(voucher)
+                        # FIXME must pass lines of move
         if vouchers:
             invoice.create_move_advance(set(vouchers))
 

service.py

@@ -230,9 +230,14 @@ class ServiceLine(Workflow, ModelSQL, ModelView):
 
     def add_product_to_room(self):
         FolioCharge = Pool().get('hotel.folio.charge')
+        Folio = Pool().get('hotel.folio')
         if self.folio_line:
             return
 
+        folios = Folio.search([
+            ('room', '=', self.room.id),
+            ('registration_state', '=', 'check_in'),
+        ])
         # if not folios:
         #     raise UserError(
         #         gettext('hotel.msg_room_not_occupied', s=self.room.name)
@@ -242,7 +247,10 @@ class ServiceLine(Workflow, ModelSQL, ModelView):
         #         gettext('hotel.msg_multiple_rooms_active', s=self.room.name)
         #     )
 
-        # folio = folios[0]
+        if not folios:
+            return
+
+        folio = folios[0]
         new_line = {
             'folio': self.folio.id,
             'date_service': self.service.service_date,