From 30a378865e3f2517afb8bac2aca905e331c63375 Mon Sep 17 00:00:00 2001
From: evazion <noizave@gmail.com>
Date: Mon, 12 Aug 2019 13:38:45 -0500
Subject: [PATCH] TagAlias.to_aliased: avoid query on blank arguments.

PostQueryBuilder calls `to_aliased` with empty arguments in some cases.
Return early to avoid a query in those cases.
---
 app/models/tag_alias.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/app/models/tag_alias.rb b/app/models/tag_alias.rb
index 8c1663a3d..d848bf4e7 100644
--- a/app/models/tag_alias.rb
+++ b/app/models/tag_alias.rb
@@ -45,6 +45,7 @@ class TagAlias < TagRelationship
 
   def self.to_aliased(names)
     names = Array(names)
+    return names if names.empty?
     aliases = active.where(antecedent_name: names).map { |ta| [ta.antecedent_name, ta.consequent_name] }.to_h
     names.map { |name| aliases[name] || name }
   end