From 2470392e89e3320e0e5d4de4dd73db0fd4a30181 Mon Sep 17 00:00:00 2001
From: Sebastian Martinez <sebastian@wyeworks.com>
Date: Sun, 15 May 2011 21:33:49 -0300
Subject: Add doc to #attribute_names

---
 activerecord/lib/active_record/base.rb | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'activerecord/lib/active_record')

diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index cfe6d8d2de..cd16b8d3ca 100644
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -767,6 +767,9 @@ module ActiveRecord #:nodoc:
         super || (table_exists? && column_names.include?(attribute.to_s.sub(/=$/, '')))
       end
 
+      # Returns an array of column names as strings if it's not
+      # an abstract class and table exists.
+      # Otherwise it returns an empty array.
       def attribute_names
         @attribute_names ||= if !abstract_class? && table_exists?
             column_names
-- 
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