Correct use if != nil || != "" ROR

Question

Redirect to city_path if @city.name not equal nil and ""

If @city.name equal "" also redirect to city_path. How to fix it?

if (@city.name != nil || @city.name != "")
      redirect_to city_path
      else
      render 'index'
    end

Answer 1

In one line with ternary operator and blank? method:

@city.name.blank? ? redirect_to(city_path) : render('index')

Answer 2

You can use present? method it will handle both nil and blank values

if (@city.name.present?)
      redirect_to city_path
      else
      render 'index'
    end

Answer 3

You can use like

 if @city.name.present?
      redirect_to city_path
      else
      render 'index'
    end