Convert models to use new search includes mechanism

app/models/post_vote.rb

@@ -20,7 +20,7 @@ class PostVote < ApplicationRecord
 
   def self.search(params)
     q = super
-    q = q.search_attributes(params, :post, :user, :score)
+    q = q.search_attributes(params, :score)
     q.apply_default_order(params)
   end
 
@@ -50,6 +50,10 @@ class PostVote < ApplicationRecord
     end
   end
 
+  def self.searchable_includes
+    [:user, :post]
+  end
+
   def self.available_includes
     [:user, :post]
   end