Add cache to is_favorited(user)

app/models/party.rb

@@ -120,9 +120,6 @@ class Party < ApplicationRecord
   PREVIEW_EXPIRY = 30.days
   MAX_RETRY_ATTEMPTS = 3
 
-  def is_favorited(user)
-    user.favorite_parties.include? self if user
-  end
   after_commit :schedule_preview_generation, if: :should_generate_preview?
 
   def is_remix
@@ -149,6 +146,14 @@ class Party < ApplicationRecord
     visibility == 3
   end
 
+  def is_favorited(user)
+    return false unless user
+
+    Rails.cache.fetch("party_#{id}_favorited_by_#{user.id}", expires_in: 1.hour) do
+      user.favorite_parties.include?(self)
+    end
+  end
+
   def ready_for_preview?
     return false if weapons_count < 1 # At least 1 weapon
     return false if characters_count < 1 # At least 1 character