AO3-5052 Delete cached series byline when updating pseud or username

app/models/pseud.rb

@@ -400,7 +400,7 @@ def check_default_pseud
   def expire_caches
     if saved_change_to_name?
       works.touch_all
-      series.touch_all
+      series.each(&:expire_byline_cache)
     end
   end
 

app/models/series.rb

@@ -150,6 +150,12 @@ def expire_caches
     self.works.each(&:touch) if saved_change_to_title?
   end
 
+  def expire_byline_cache
+    [true, false].each do |only_path|
+      Rails.cache.delete("#{cache_key}/byline-nonanon/#{only_path}")
+    end
+  end
+
   # Change the positions of the serial works in the series
   def reorder_list(positions)
     SortableList.new(self.serial_works.in_order).reorder_list(positions)

app/models/user.rb

@@ -158,7 +158,7 @@ class User < ApplicationRecord
 
   def expire_caches
     return unless saved_change_to_login?
-    series.touch_all
+    series.each(&:expire_byline_cache)
     self.works.each do |work|
       work.touch
       work.expire_caches

spec/models/pseud_spec.rb

@@ -66,20 +66,6 @@
     end
   end
 
-  describe "expire_caches" do
-    let(:pseud) { create(:pseud) }
-    let(:series) { create(:series, authors: [pseud]) }
-
-    it "modifies the updated_at of associated series" do
-      pseud.reload
-      series.reload
-      travel(1.day)
-      expect do
-        pseud.update(name: "New Name")
-      end.to change { series.reload.updated_at }
-    end
-  end
-
   describe ".default_alphabetical" do
     let(:user) { create(:user, login: "Zaphod") }
     let(:subject) { user.pseuds.default_alphabetical }