use one query to get tag names for sites in browse

app/browse.rb

@@ -15,6 +15,14 @@ get '/browse/?' do
   @pagination_dataset = site_dataset
   @sites = site_dataset.all
 
+  site_ids = @sites.collect {|s| s[:id]}
+  tags = DB['select site_id,name from tags join sites_tags on tags.id=sites_tags.tag_id where site_id IN ?', site_ids].all
+
+  @site_tags = {}
+  site_ids.each do |site_id|
+    @site_tags[site_id] = tags.select {|t| t[:site_id] == site_id}.collect {|t| t[:name]}
+  end
+
   if params[:tag]
     @title = "Sites tagged #{params[:tag]}"
   end

views/browse.erb

@@ -116,10 +116,10 @@
             </a>
           </div>
           <div class="site-tags">
-            <% if site.tags.count > 0 %>
+            <% if @site_tags[site.id].length > 0 %>
               <i class="fa fa-tag"></i>
-              <% site.tags.each_with_index do |tag, index| %>
+              <% @site_tags[site.id].each_with_index do |tag, index| %>
-                <a class="" href="/browse?tag=<%= Rack::Utils.escape tag.name %>"><%= tag.name %></a><% if index != site.tags.length - 1 %>,<% end %>
+                <a class="" href="/browse?tag=<%= Rack::Utils.escape tag %>"><%= tag %></a><% if index != @site_tags[site.id].length - 1 %>,<% end %>
               <% end %>
             <% end %>
           </div>