Check loaded ULs.

load.py

@@ -79,7 +79,8 @@ class LoadOrder:
             'draft_ul': 'Cannot change state to Draft for load order "%s" because it has loaded ULs.',
             'pending_uls': 'You have loaded less ULs (%s) than expected (%s).',
             'sale_confirmed': 'Cannot force loading ULs because sale "%s" is confirmed.',
-            'unload_cancel': 'Cannot force unloading all ULs. Load order "%s" must be cancelled completely.'
+            'unload_cancel': 'Cannot force unloading all ULs. Load order "%s" must be cancelled completely.',
+            'no_uls': 'Load order "%s" must have some UL to be finished.'
         })
 
     @classmethod
@@ -267,6 +268,8 @@ class LoadOrder:
     @classmethod
     def _check_loaded_quantity(cls, records):
         for record in records:
+            if not record.unit_loads:
+                cls.raise_user_error('no_uls', record.rec_name)
             if record.ul_quantity > len(record.unit_loads):
                 cls.raise_user_warning('pending_uls_%s' % record.id, 'pending_uls',
                                        (len(record.unit_loads), int(record.ul_quantity)))

locale/es_ES.po

@@ -50,6 +50,10 @@ msgctxt "error:carrier.load.order:"
 msgid "Cannot force loading ULs because sale \"%s\" is confirmed."
 msgstr "No puede forzar la carga de UdCs porque la Venta asociada \"%s\" está confirmada."
 
+msgctxt "error:carrier.load.order:"
+msgid "Load order \"%s\" must have some UL to be finished."
+msgstr "La Orden de carga \"%s\" debe contener alguna UdC para poder finalizarse."
+
 msgctxt "error:carrier.load_uls:"
 msgid "Cannot find Unit load \"%s\"."
 msgstr "No se ha podido encontrar la UdC \"%s\"."