I am trying group ever User friends by highschool, the user signs in with his facebook account, I use facebook graph to get all his friends.
This code here outputs/print first all User friends and prints the groups every friend by highschool. I dont want that, I only want it to output/print the groups.
<ul class="friends-list">
<% current_user.friends.group_by(&:highschool_name).map do |hsname, friends| %>
<li><%= hsname %></li>
<% friends.map do |friend| %>
<%= image_tag(friend.image) %>
<% end %>
<% end %>
</ul>
The User tabel:
[id, name, image, location, highschool_name, highschool_year, college_name, college_year, graduteschool_name, graduate_year ]
The Friend tabel:
[id, uid, name, image, higschool_name, college_name, graduateschool_name, user_id]
The current output in more details:
Started GET "/users/1" for 127.0.0.1 at 2012-07-16 01:10:17 +0200
Processing by UsersController#show as HTML
Parameters: {"id"=>"1"}
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1 [["id", "1"]]
Rendered users/_profile_content.html.erb (0.6ms)
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1 [["id", 1]]
Friend Load (9.2ms) SELECT "friends".* FROM "friends" WHERE "friends"."user_id" = 1
Rendered users/show.html.erb within layouts/application (287.4ms)
Rendered layouts/_shim.html.erb (0.1ms)
Rendered layouts/_header.html.erb (2.3ms)
Rendered layouts/_footer.html.erb (0.6ms)
Completed 200 OK in 321ms (Views: 309.3ms | ActiveRecord: 9.8ms)
A image of the output:
http://postimage.org/image/tgyl9f27n/
The problem:
some values in the database that was empty. Gives the error
The solution: