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Tony McKeown
Tony McKeown
Courses Plus Student 14,300 Points

Treebook - Create mutual friends lists


I've created a friends tab on the user profile page and would like to add a separate bit that shows friends that you have in common with the profile that you are viewing.

I've tried lots of different ways to compare the friends list of the current user and profile page user to find common friends that you have but all the MANY different ways I've tried haven't returned anything. Not even an error message. Can anyone give me a hint on how to construct the query as I'm a little stuck!

Edit - a quick example - I think I got this to work but is there a better way?

<% if current_user.friends.include?(friend) and @user.friends.include?(friend) %>
<%= friend.profile_name %>
<% end %>

But how would I write the query in the profiles_controller so that I can use it in a do block to get additional information in a nicely formatted way?

1 Answer

David Rhinehart
David Rhinehart
2,268 Points

you could create a new array of common elements using &

common_friends = current_user.friends & @user.friends

Tony McKeown
Tony McKeown
Courses Plus Student 14,300 Points

Thanks David. I can't believe how simple that was. I created a long convoluted way myself by overthinking the problem! At least I can now cut down the code that I was using.