Rails 在 Session 中存放数据

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class HelloController < ApplicationController
  def there
    @counter1 = 1

    if(session[:counter2])
      @counter2 = session[:counter2]
      @counter2 += 1
      session[:counter2] = @counter2
    else
      @counter2 = 1
      session[:counter2] = @counter2
    end
  end
end