In my app I am trying to incorporate better fragment caching.
Is it a best practice to do call fragments like this:
<% cache("user/#{current_user.id}/info") do %>
<%= current_user.email %> information goes here
<% end %>
Yes you are doing it right!
Why? The cache fragment's key must reflect the "uniqueness" of the content:
Statement: Your content is uniq for each user
Conclusion: Your fragment's key must be different for each user
Usage: using the user's id is the best choice since every user id is uniq!