Domain Model to DataView

I checked nearly all documents and most of questions but still can’t find any way to do it. It is maybe really simple but i am new to Mendix. I have page that getting info from user. With those info, doing REST call to 3rd party and keep the result in model. However, i couldn’t return result with to the dataview for child objects. From the pictures, how can i reach the id of Lock object in the Locks list. This model is created automatically. If i draw arrows from Locks to Lock (like otherwise), still no success  
1 answers

On your page with the dataview for the asset, create a second dataview inside the existing one that shows the locks entity.

The within this newly added dataview add a grid/list or template widget to show the list of lock objects.

So the answer is nested dataviews and grids/lists.