Custom Collection within a Custom Collection

Is there an approach to getting something like a Custom Collection inside another Custom Collection? Or another approach for getting these nested under each other?

  1. Custom Collection of Project Phases by Project
  2. Collection of Project Tasks by Project Phase (related table to Phase)
  3. Collection of Project Roles (People) by Task (related table to Tasks)

Here is an image of what I am trying to get to. The number of Phases, Tasks, and Roles can be different on every project.

You can put a regular collection inside of a custom collection, but you cannot put a custom collection inside of a custom collection.

If it’s just for display purposes, you could possibly retrieve all of the sub data, build a JSON object, and use some javascript to formulate it into HTML to display in a rich text component. But if you need the option to be able to click into the project roles, then I don’t think there is a good way to do that.

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