scinote-web/db/migrate/20151005122041_add_created_by_to_assets.rb

class AddCreatedByToAssets < ActiveRecord::Migration[4.2]
  def change
    %i(
      assets checklists checklist_items my_module_groups
      my_module_tags my_modules teams projects
      sample_groups sample_types tables tags
    ).each do |table_name|
      add_column table_name, :created_by_id, :integer
      add_index table_name, :created_by_id
    end

    %i(
      assets checklists checklist_items comments
      custom_fields my_modules teams projects
      reports results sample_groups sample_types samples
      steps tables tags
    ).each do |table_name|
      add_column table_name, :last_modified_by_id, :integer
      add_index table_name, :last_modified_by_id
    end

    %i(my_modules projects results).each do |table_name|
      add_column table_name, :archived_by_id, :integer
      add_index table_name, :archived_by_id
      add_column table_name, :restored_by_id, :integer
      add_index table_name, :restored_by_id
      add_column table_name, :restored_on, :datetime
    end

    %i(sample_my_modules user_my_modules user_teams user_projects).each do |table_name|
      add_column table_name, :assigned_by_id, :integer
      add_index table_name, :assigned_by_id
    end

    add_column :sample_my_modules, :assigned_on, :datetime
  end
end