respond_to do |format|
  if @to_do.save
    format.html { redirect_to @to_do, notice: 'To do was successfully created.' }
    format.json { render :show, status: :created, location: @to_do }
  else
    format.html { render :new }
    format.json { render json: @to_do.errors, status: :unprocessable_entity }
  end
end