gistfile1.txt

def create
  @user = User.find(params[:responsibility][:user_id])
  @company = Company.find(params[:company_id])
  
  # create an array of responsibilities that we want to save
  responsibilities = params[:responsibility][:division_ids].collect do |division_id|
    Responsibility.new(:division_id => division_id, :user_id => @user.id)
  end
  
  # get a list of invalid responsibilities
  @invalid_responsibilities = responsibilities.collect do |responsibility|
    responsibility unless responsibility.valid?
  end.compact
  
  if @invalid_responsibilities.length > 0
    # we have one or more invalid responsibilites
    render :index and return
  else
    # all new responsibility are valid so delete the current ones
    Responsibility.delete_all(:user_id => @user.id)
    
    # and apply the new ones
    responsibilites.each(&:save)

    # continue...
    flash[:notice] = t('successfully_changed_responsibilities')
    redirect_to company_profile_responsibilities_path(@company, @user.profile)
  end
end