class UpdatePlaybackSessionsFromArchitecture < ActiveRecord::Migration[8.1]
  def change
    change_table :playback_sessions do |t|
      # Add defaults for fields
      t.change_default :position, 0.0
      t.change_default :duration_watched, 0.0
      t.change_default :completed, false
      t.change_default :play_count, 0
    end

    # Add indexes as specified in architecture
    add_index :playback_sessions, [:video_id, :user_id], unique: true
    add_index :playback_sessions, :last_watched_at
  end
end