Fix: use explicit order field for workflow actions (#11781)

src/documents/serialisers.py

@@ -2577,7 +2577,8 @@ class WorkflowSerializer(serializers.ModelSerializer):
                 set_triggers.append(trigger_instance)
 
         if actions is not None and actions is not serializers.empty:
-            for action in actions:
+            for index, action in enumerate(actions):
+                action["order"] = index
                 assign_tags = action.pop("assign_tags", None)
                 assign_view_users = action.pop("assign_view_users", None)
                 assign_view_groups = action.pop("assign_view_groups", None)
@@ -2704,6 +2705,16 @@ class WorkflowSerializer(serializers.ModelSerializer):
 
         return instance
 
+    def to_representation(self, instance):
+        data = super().to_representation(instance)
+        actions = instance.actions.order_by("order", "pk")
+        data["actions"] = WorkflowActionSerializer(
+            actions,
+            many=True,
+            context=self.context,
+        ).data
+        return data
+
 
 class TrashSerializer(SerializerWithPerms):
     documents = serializers.ListField(