How to migrate existing application from paper_trail to active_snapshot

[westonganger]

This question was raised in another thread, #14 (comment)

Is there any guide on migrating existing application from paper_trail to this gem?

[westonganger]

Seems to me that this should be easy to do. Disclaimer, I just whipped this up quickly, its totally untested.

class MyRecord
  has_snapshot_children do
    ...
  end
end


MyRecord.all.each do |record|
  record.versions.each do |version|

    ### Use whatever options are applicable here
    reified_record = version.reify(
      has_many: true, 
      has_one: true, 
      belongs_to: false,
    )

    snapshot_identifier = "#{version.updated_at}"

    user = User.find(version.whodunnit) if version.whodunnit

    reified_record.create_snapshot(
      identifier: snapshot_identifier, 
      user: user,
      metadata: {
        info: "Migrated from paper_trail-association_tracking"
      }
    )

  end
end