From 901801fa80923381a2d7d1efba617e12285670a6 Mon Sep 17 00:00:00 2001
From: Shishir Kakaraddi <shishirkakaraddi@gmail.com>
Date: Thu, 26 Apr 2018 21:11:38 -0700
Subject: [PATCH] checks if method is defined before defining it

---
 lib/extensions/has_one.rb | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/extensions/has_one.rb b/lib/extensions/has_one.rb
index 2f83bc7..9016222 100644
--- a/lib/extensions/has_one.rb
+++ b/lib/extensions/has_one.rb
@@ -9,8 +9,10 @@ if defined?(::ActiveRecord)
       super
       name = reflection.name
       mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
-        def #{name}_id
-          association(:#{name}).reader.try(:id)
+        unless defined? #{name}_id
+          def #{name}_id
+            association(:#{name}).reader.try(:id)
+          end
         end
       CODE
     end