Rubocop：在无效上下文中使用的文字。[Lint / Void]

Question

I am having some issues correctly formatting the code below following Rubocop inspection in my Ruby on Rails Application. I keep getting the errors:

Rubocop:Literal[:success, JSON.parse(response.to_str)] used in void context.[Lint/Void]

and

Rubocop:Literal[:unprocessable_entity, JSON.parse(response.to_str)] used in void context.[Lint/Void].

I just can't figure out what the issue is with the code and how to fix it.

case response.code
when 200
  [:success, JSON.parse(response.to_str)]
  redirect_to root_url, notice: 'Logged in!'
when 422
  [:unprocessable_entity, JSON.parse(response.to_str)]
  flash.now[:alert] = 'Email or password is invalid'
  render 'new'
else
  raise "Invalid response #{response.to_str} received."
end

Answer 1

You are not using this [:success, JSON.parse(response.to_str)] and this [:unprocessable_entity, JSON.parse(response.to_str)] anywhere in your code. Either remove it or assign it in a variable but assigning it in a variable and not using that variable may cause the warning again.

You should remove the code which you are not using. Try this:

case response.code
when 200
  redirect_to root_url, notice: 'Logged in!'
when 422
  flash.now[:alert] = 'Email or password is invalid'
  render 'new'
else
  raise "Invalid response #{response.to_str} received."
end

or try this:

case response.code
when 200
  @success = [:success, JSON.parse(response.to_str)]
  redirect_to root_url, notice: 'Logged in!'
when 422
  @error = [:unprocessable_entity, JSON.parse(response.to_str)]
  flash.now[:alert] = 'Email or password is invalid'
  render 'new'
else
  raise "Invalid response #{response.to_str} received."
end

Let me know if it worked.