-> linkable

Adds an "open in a new tab" icon next to the association's panel title.

• On has_many and has_and_belongs_to_many, the icon opens the association table on its own page.
• On has_one, the icon opens the associated record's show page.

field :admin, as: :has_one, linkable: true

This feature doesn't go deeper than this. It just helps you get to the association in a separate page.