[RAILS] Dicas de como debugar um controller de dentro do console 'rails c'

dicas.rb

# De dentro do console do rails, temos a variavel app, 
# de onde podemos consultar a sessão ou executar get e post em rotas da nossa aplicação

app.get "/dashboard/index"
# Redirected to http://www.example.com/login
# Filter chain halted as :require_logged_user rendered or redirected
# Completed 302 Found in 20ms (ActiveRecord: 0.0ms)
# => 302

app.session.to_hash
#=> {"session_id"=>"01259fd413c0c5be6aa41036c34dce20",
# "_csrf_token"=>"AnKSbt26UDElVJfNInE0UtuDQPVig7LonImJ8hFc9WI=",
# "flash"=>{"discard"=>[], "flashes"=>{"notice"=>"É necessário estar logado!"}}}

app.get '/login'
#Started GET "/login" for 127.0.0.1 at 2015-12-28 18:23:46 -0200
#  ActiveRecord::SchemaMigration Load (0.2ms)  SELECT "schema_migrations".* FROM "schema_migrations"
#Processing by SessionsController#new as HTML
#  Rendered sessions/new.html.erb within layouts/application (8.1ms)
#Completed 200 OK in 370ms (Views: 362.6ms | ActiveRecord: 0.0ms)
#=> 200

app.session.to_hash
#=> {"session_id"=>"3ee664b2bed97a4a6388774c97932a57", "_csrf_token"=>"t3oznWlssIYR6ktcqahnGN+FdusrlYBvMdGk16iiNys="}

app.post "/login", {"utf8"=>"✓", "authenticity_token"=>"<copiar o _csrf_token da sessão>", login: 'login', password: 'pass'}
#Completed 302 Found in 48ms (ActiveRecord: 2.7ms)
#=> 302

app.session.to_hash
#=> {"session_id"=>"a61adca0a18b0f59d277a0ff718b1921", "user_id"=>1, "flash"=>{"discard"=>[], "flashes"=>{"alert"=>"Logado com sucesso!"}}}