From b5a2f24b6b2b466a5692f0d46b4a2b8154ee0e53 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafael=20Mendon=C3=A7a=20Fran=C3=A7a?=
 <rafaelmfranca@gmail.com>
Date: Wed, 4 Jul 2012 08:23:51 -0300
Subject: Update 4.0 Release Notes

Related with 17d2115e3df6caf15d554b44e28177069fa3ed5b
---
 guides/source/4_0_release_notes.textile | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/guides/source/4_0_release_notes.textile b/guides/source/4_0_release_notes.textile
index e1d6b42e6c..d430dca164 100644
--- a/guides/source/4_0_release_notes.textile
+++ b/guides/source/4_0_release_notes.textile
@@ -329,6 +329,20 @@ Moved into a separate gem <tt>sprockets-rails</tt>.
 
 h3. Active Record
 
+* Add <tt>add_reference</tt> and <tt>remove_reference</tt> schema statements. Aliases, <tt>add_belongs_to</tt> and <tt>remove_belongs_to</tt> are acceptable. References are reversible.
+
+<ruby>
+# Create a user_id column
+add_reference(:products, :user)
+
+# Create a supplier_id, supplier_type columns and appropriate index
+add_reference(:products, :supplier, polymorphic: true, index: true)
+
+# Remove polymorphic reference
+remove_reference(:products, :supplier, polymorphic: true)
+</ruby>
+
+
 * Add <tt>:default</tt> and <tt>:null</tt> options to <tt>column_exists?</tt>.
 
 <ruby>
@@ -343,7 +357,7 @@ User.where(:age => 30)      # => returns the relation
 User.where(:age => 30).to_a # => executes the query and returns the loaded objects, as before
 </ruby>
 
-* Add <tt>collation</tt> and <tt>ctype</tt> support to PostgreSQL. These are available for PostgreSQL 8.4 or later.
+* Add <tt>:collation</tt> and <tt>:ctype</tt> support to PostgreSQL. These are available for PostgreSQL 8.4 or later.
 
 <yaml>
 development:
-- 
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