From eb9f1ef84f5236c6a1d4d46d372bf8fe6e2fff58 Mon Sep 17 00:00:00 2001
From: Aditya Kapoor <aditya.kapoor@vinsol.com>
Date: Thu, 21 Aug 2014 01:01:45 +0530
Subject: [PATCH] [ci skip] add doc for STEP in migration

---
 activerecord/lib/active_record/migration.rb | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index 9219d70c65..d0d9304a36 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -181,9 +181,12 @@ module ActiveRecord
   #
   # To roll the database back to a previous migration version, use
   # <tt>rake db:migrate VERSION=X</tt> where <tt>X</tt> is the version to which
-  # you wish to downgrade. If any of the migrations throw an
-  # <tt>ActiveRecord::IrreversibleMigration</tt> exception, that step will fail and you'll
-  # have some manual work to do.
+  # you wish to downgrade. Alternatively, you can also use the STEP option if you
+  # wish to rollback last few migrations. <tt>rake db:migrate STEP=2</tt> will rollback
+  # the latest two migrations.
+  # 
+  # If any of the migrations throw an <tt>ActiveRecord::IrreversibleMigration</tt> exception, 
+  # that step will fail and you'll have some manual work to do.
   #
   # == Database support
   #