How to rectify versions on has_many/belongs_to association with paper_trail

Question

I use paper_trail in rails to track my models versions. But the documentation on the github repo indicates that the gem doesn't support has_many, belongs_to associations.

Let's say I've an app that records the ceos names of some comapnies:

class Company < ActiveRecord::Base
  has_many :ceos
  has_paper_trail
end

class Ceo < ActiveRecord::Base
  belongs_to :companies
  has_paper_trail
end

The above example represent the information of ABC Inc.

company.name => "ABC"
company.ceo.past => "John Henry"
company.ceo.present =>  "Amy Warren"

How can I implement the following operation so it will reset the company and the company's ceos names to the last version?

Noll

Do you have any update on this? – Heterosporous

I also have same issue – Bathometer

did you find the solution? – Alviani

Answer 1

You could attempt to re-model the association to remove the has_many because in the case of CEOs, a company may have_many CEOs through its life, but it only has_one CEO for a certain period.

The implementation of this might be a has_one to a join table made up of the ID of both CEO and Company, and the time periods it was valid for.

A beneficial side effect is it would become trivial to have a person be CEO of a company 2 times with another CEO in between and have easy traversal of that in the domain.

Hirai

Answer 2

The instructions for how to handle this can be found in the README: https://github.com/airblade/paper_trail/blob/master/README.md#associations

Basically  will need to create a version_associations table, either at installation time with the rails generate paper_trail:install --with-associations option or manually for this to work.

I suggest you read the full documentation on Github for details on how this works.

Mazdaism

This does not answer the question at all. You just have copied and pasted the poorly written instructions on this topic. – Macon

@Macon Maybe you can help me, and others, by editing the question and make it clearer what it is that the OP is asking for then? – Mazdaism