fixes #1904: Display aliases/implications in artist excerpt, fixes bug with approving alias/implications involving artists

app/models/forum_post.rb

@@ -92,7 +92,7 @@ class ForumPost < ActiveRecord::Base
   end
 
   def validate_topic_is_unlocked
-    return if CurrentUser.user.is_moderator?
+    return if CurrentUser.is_moderator?
     return if topic.nil?
 
     if topic.is_locked?

app/models/tag_alias.rb

@@ -86,7 +86,10 @@ class TagAlias < ActiveRecord::Base
     clear_all_cache
     ensure_category_consistency
     update_posts
-    update_forum_topic_for_approve if update_topic
+    admin = CurrentUser.user || User.admins.first
+    CurrentUser.scoped(admin, "127.0.0.1") do
+      update_forum_topic_for_approve if update_topic
+    end
     update_column(:post_count, consequent_tag.post_count)
     update_column(:status, "active")
   rescue Exception => e