A new rails project should start as:
rails articles
then scaffolding (if you want) with:
script/generate scaffold article title:text ... rake db:create ... rake db:migrate ...
Ruby Array for session manage
>> a = {:uno => '1uno'}
=> {:uno=>"1uno"}
>> a[0]
=> nil
>> a[1]
=> nil
>> a[:uno]
=> "1uno">> a = {:due => '2due'}
=> {:due=>"2due"}
>> a
=> {:due=>"2due"}
>> a = {:uno => '1uno'}
=> {:uno=>"1uno"}
>> a[:due] = '2due'
=> "2due"
>> a
=> {:uno=>"1uno", :due=>"2due"}>> b = {:elenco => a}
=> {:elenco=>{:uno=>"1uno", :due=>"2due"}}>> a.store(:tre, '3tre')
=> "3tre"
>> a
=> {:uno=>"1uno", :due=>"2due", :tre=>"3tre"}
>> b
=> {:elenco=>{:uno=>"1uno", :due=>"2due", :tre=>"3tre"}}
>> b[:elenco]
=> {:uno=>"1uno", :due=>"2due", :tre=>"3tre"}>> b[:elenco][:quattro] = '4quattro'
=> "4quattro"
>> a
=> {:uno=>"1uno", :due=>"2due", :tre=>"3tre", :quattro=>"4quattro"}>> b[:elenco].store(:cinque, '5cinque')
=> "5cinque"
>> b
=> {:elenco=>{:uno=>"1uno", :due=>"2due", :cinque=>"5cinque", :tre=>"3tre", :quattro=>"4quattro"}}
>> a
=> {:uno=>"1uno", :due=>"2due", :cinque=>"5cinque", :tre=>"3tre", :quattro=>"4quattro"}