class AddProjectToComment < ActiveRecord::Migration
  def up
    add_column :comments, :project_id, :integer
    Subscribe.reset_column_information
    Comment.where(commentable_type: 'Grit::Commit').destroy_all
    Comment.where(commentable_type: 'Issue').each do |comment|
      comment.update_column(:project_id, comment.commentable.project.id)
    end
  end

  def down
    remove_column :comments, :project_id
  end
end