I have a context where there are sections and a section can have multiple items.

A item can have rules. There is a Rules entity section. A Item can have many rules and a rule can be in multiple items so there is a many to many relationship between items and rules.

I have a popup "NewItemPopUp" for the user to create new items and also edit existing items that belong to a specific section.

In this popup I want to show a combo box to allow the user select a rule from the static entity "Rules", the rule can be A, B, C or D. And then have a add button for the user to add a new rule to the item inside the popup. And I want to show the rules associated with a item inside the popup at the bottom of the popup. However, service studio is not allowing to add a list records inside the popup to show the rules associated with the item. 

Do you know how to solve the issue?

I have a OML with the issue , the flow is in the TestSscreen. To test probably you need to create first a template then when you click in a template in the table records you can create new sections. Then is possible to create items inside 

Thanks!