params[:player_types].each do |p_type_params|
  if p_type_params[:id]
    player = @player_types.find(p_type_params[:id])
    player.assign_attributes(p_type_params)
    @player_types << player
  end
end

ActiveRecord::Base.transaction do
  @player_types.each do |player_type|
    if player_type.save
      "DO Something.."
    else
      "DO something else.."
      errors = true
    end
  end
end