discourse/db/migrate/20140522003151_add_user_avatars.rb

class AddUserAvatars < ActiveRecord::Migration[4.2]
  def up
    create_table :user_avatars do |t|
      t.integer :user_id, null: false
      t.integer :system_upload_id
      t.integer :custom_upload_id
      t.integer :gravatar_upload_id
      t.datetime :last_gravatar_download_attempt
      t.timestamps null: false
    end

    add_index :user_avatars, [:user_id]

    execute <<SQL
   INSERT INTO user_avatars(user_id, custom_upload_id)
   SELECT id, uploaded_avatar_id
   FROM users
SQL

    execute <<SQL
    UPDATE users SET uploaded_avatar_id = NULL
    WHERE NOT use_uploaded_avatar
SQL

    # NOTE we should nuke use_uploaded_avatar later on
  end

  def down
    drop_table :user_avatars
  end
end