gistfile1.txt

def destroy
    @expense = Expense.find(params[:id])

    if @expense.user_id == current_user.id
      @expense.destroy
      flash[:success] = "You have successfully deleted the expense."
    else
      flash[:error] = "You can't delete expenses that you didn't create."
    end

    respond_to do |format|
      format.html { redirect_to expenses_url }
      format.json { head :ok }
    end
end