Entity reference hierarchy

This is a Drupal module that provides hierarchical entity reference field.

Entity reference field that comes with Drupal core allows creating a linear list of entity references. This module allows creating hierarchical entity references where each entity reference can be in a parent/child relationship with another entity reference. It also supports revisions if used together with Entity reference revisions module.

Example

• Reference (delta 0)
• Reference (1)
  • Reference (2)
  • Reference (3)
    • Reference (4)
    • Reference (5)
  • Reference (6)
• Reference (7)

Entity reference items can be dragged and dropped with the same UI that handles taxonomy menu links hierarchy.

Installation

Download and enable as any other Drupal module.

Configuration

• Add a field of type Entity reference hierarchy or Entity reference revisions hierarchy to your entity.
• That's it. Start entering content.