Show related Workflow-Tasks with Related Items

[gaj]

Hi,
We generate via SP2013-Workflow one ore more Tasks for a list-Item.
On the spform for this list-Item we want to show all related Tasks via "spform-Related Items".
Data Source configuration:
- "List:" our task-list (Workflowtask (SharePoint 2013))
- "Filter by form field"
- "List field:" we uses the field Name of the "Related Item"-Type from the task-list(Workflowtask (SharePoint 2013) )
- "Form field:" we tryed "ID" but don´t work

How to we manage this?
thx for help

[Dmitry Kozlov]

Hi,
You cannot use the Related Items column for filtering because it contains just a URL of the parent item, not a field value.
I'd recommend you to created a custom field in the Tasks list, say ParentID and populate it in the workflow. Then use it for filtering.