Hi Danilo,

Although I don't know the structure/format of your database.
Try out the following snippet.

Shoes.app do
  row_user = [['Danilo', 'Apple', 2012], ['ashbb', 'Orange', 1999]]
  list_box items: row_user.map{|row| row.map(&:to_s).join(' ')}
end

The Shoes-list_box-items should have an array not nested.

Hope this helps,
ashbb