In my project, I was asked to keep track of changes in records. I found PaperTrails gem, and its found to be pretty useful.
But it lacks a straightforward feature to know the fields changed in that particular version. Then I thought to write custom event name so that I could grep the field_name I wish to check.
# == Schema Information
#
# Table name: tasks
#
# id :integer not null, primary key
# worker_id :integer
# customer_id :integer
# kind :integer default(0)
# status :integer default(0)
# note :text
# start_on :datetime
# complete_on :datetime
# started_on :datetime
# completed_on :datetime
# created_at :datetime not null
# updated_at :datetime not null
# driver_acceptance :integer default(0)
# refuel_id :integer
# shift_id :integer
#
class Task < ActiveRecord::Base
include Timeable
has_paper_trail
# Update event-name on update
before_save :paper_trail_events, on: :update
enum status: { scheduled: 0, started: 1, skipped: 2, completed: 3, paused: 4, rescheduled: 5 }
enum kind: { inter_location: 0, refuel: 1, break: 2 }
enum driver_acceptance: { pending: 0, accepted: 1, rejected: 2, sent: 3 }
private
def paper_trail_events
changed_fields = self.changes.keys - ['created_at', 'updated_at']
self.paper_trail_event = "Updated #{changed_fields.join(',')}"
end
end
In Rails Console
> Task.find(1768).versions.map &:event
=> ["Updated start_on,complete_on,status", "Updated worker_id"]
