erp5_mrp: get first from previous value

bt5/erp5_mrp/DocumentTemplateItem/portal_components/document.erp5.ProductionSimulationRule.py

@@ -24,10 +24,14 @@ class DeliveryRuleMovementGenerator(MovementGeneratorMixin):
   def _getInputMovementList(self, movement_list=None, rounding=None):
     parent_simulation_movement = self._applied_rule.getParentValue().asContext()
     resource_value = parent_simulation_movement.getResourceValue()
-    transformation_list = self._applied_rule.getPortalObject().portal_catalog(
-                               portal_type="Transformation",
-                               default_resource_uid=resource_value.getUid(),
-                               validation_state="validated")
+    transformation = parent_simulation_movement.getParentValue().getParentValue().getSpecialiseValue()
+    if transformation:
+      transformation_list = [transformation]
+    else:
+      transformation_list = self._applied_rule.getPortalObject().portal_catalog(
+                                 portal_type="Transformation",
+                                 default_resource_uid=resource_value.getUid(),
+                                 validation_state="validated")
     if len(transformation_list) > 0:
       parent_simulation_movement.setSpecialiseValue(transformation_list[0].getObject(),
                                                     portal_type="Transformation")