Upgrade Rails to version 5.2.0 (#5898)

app/models/account.rb

@@ -244,11 +244,11 @@ class Account < ApplicationRecord
     end
 
     def domains
-      reorder(nil).pluck('distinct accounts.domain')
+      reorder(nil).pluck(Arel.sql('distinct accounts.domain'))
     end
 
     def inboxes
-      urls = reorder(nil).where(protocol: :activitypub).pluck("distinct coalesce(nullif(accounts.shared_inbox_url, ''), accounts.inbox_url)")
+      urls = reorder(nil).where(protocol: :activitypub).pluck(Arel.sql("distinct coalesce(nullif(accounts.shared_inbox_url, ''), accounts.inbox_url)"))
       DeliveryFailureTracker.filter(urls)
     end
 

app/models/notification.rb

@@ -81,8 +81,6 @@ class Notification < ApplicationRecord
       end
     end
 
-    private
-
     def activity_types_from_types(types)
       types.map { |type| TYPE_CLASS_MAP[type.to_sym] }.compact
     end

app/models/status.rb

@@ -322,7 +322,7 @@ class Status < ApplicationRecord
       self.in_reply_to_account_id = carried_over_reply_to_account_id
       self.conversation_id        = thread.conversation_id if conversation_id.nil?
     elsif conversation_id.nil?
-      create_conversation
+      self.conversation = Conversation.new
     end
   end