RFC: ActiveRecord::InvalidForeignKey

Since the code would be in the same place, any interest in turning ActiveRecord::InvalidForeignKey errors into validation errors? Same risks apply, I think, as ActiveRecord::RecordNotUnique.

We use validations like these to handle when the application validation fails, e.g. we have a presence validation on the required belongs to, before the record is saved, the relation is deleted, so now the save raise an FK error, which we should probably turn into an active record error (and re-raise if inside of a transaction)

Start by locating the existing ActiveRecord::RecordNotUnique handling and the corresponding ActiveRecord::InvalidForeignKey path. Review how validations behave when a relation is deleted before save, and how errors are re-raised inside transactions. Done means the project has an agreed implementation and tests for converting foreign-key failures into Active Record validation errors.