Question

So, the question is: as fixnum is not a string, how i display the amount of caipirinhas on the show?

If you iterate show this error:

private method `caipirinha' called for 0:Fixnum

New drink view

<%= d.label :caipiriha %><%= d.number_field :caipirinha %>

Show drink view

<% current_user.bar.caipirinha.times  do |s|  %>
    <%= s.caipirinha %>
<% end %>

Answer 1

How about this:

<% current_user.bar.caipirinha.to_i.times  do |s|  %>
  <%= s.caipirinha %>
<% end %>

You can use the to_i method to convert caipirinha to an integer, then call times on it.