Question

app.rb:

require 'sinatra'

class MyApp < Sinatra::Application
    enable :sessions

    if session[:user_id].nil? then
        erb :login
    end
end

require_relative 'routes/init.rb'

config.ru:

require './app'
run MyApp

Running shotgun config.ru or thin start -R config.ru yields:

app.rb:3:in `<top (required)>': undefined local variable or method `session' for main:Object (NameError)

This is very 101ish. What gives?

Answer 1

I believe the problem is that you don’t have that code within a get block or something similar. Basically, sinatra will only know about the session object in the context of a request. Something like this would work for the root url:

require 'sinatra'

class MyApp < Sinatra::Application
  enable :sessions

  get '/' do
    if session[:user_id].nil? then
      erb :login
    end
  end
end