Learn the Rules framework, part 29 – creating simple back links (complete)

by NodeOne

User story:
As site editor managing content with “see also” links, I would like the target content to link back to the content I’m updating – if it was not already linked to something else. This is important since it helps visitors find related content, and it decreases the need for manual work from my part.

Required preparations:
A content type with an entity reference field to other content (see attached feature)
Required modules: Entity reference

The content type used in this exercise
The completed configuration