From d0d1cd3d45f14e8423ee8ee3f4c19e999a69b96c Mon Sep 17 00:00:00 2001
From: Ryuta Kamizono <kamipo@gmail.com>
Date: Fri, 28 Sep 2018 04:53:43 +0900
Subject: Extract `Arel.arel_node?` helper method

---
 activerecord/lib/arel.rb | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'activerecord/lib/arel.rb')

diff --git a/activerecord/lib/arel.rb b/activerecord/lib/arel.rb
index 7d04e1cac6..dab785738e 100644
--- a/activerecord/lib/arel.rb
+++ b/activerecord/lib/arel.rb
@@ -35,6 +35,11 @@ module Arel # :nodoc: all
   def self.star
     sql "*"
   end
+
+  def self.arel_node?(value)
+    value.is_a?(Arel::Node) || value.is_a?(Arel::Attribute) || value.is_a?(Arel::Nodes::SqlLiteral)
+  end
+
   ## Convenience Alias
   Node = Arel::Nodes::Node
 end
-- 
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