Added Base#reload that reloads the attributes of an object from the database #422 [Andreas Schwarz]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@376 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

3 files changed, 20 insertions, 2 deletions

diff --git a/activerecord/CHANGELOG b/activerecord/CHANGELOG
index 8bc77eca5b..46870fb3a5 100644
--- a/activerecord/CHANGELOG
+++ b/activerecord/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Added Base#reload that reloads the attributes of an object from the database #422 [Andreas Schwarz]
+
 * Added SQLite3 compatibility through the sqlite3-ruby adapter by Jamis Buck #381 [bitsweat]
 
 * Added support for the new protocol spoken by MySQL 4.1.1+ servers for the Ruby/MySQL adapter that ships with Rails #440 [Matt Mower] 
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index bd7195a33b..8be5c7302a 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -874,6 +874,13 @@ module ActiveRecord #:nodoc:
         toggle(attribute).update_attribute(attribute, self[attribute])
       end
 
+      # Reloads the attributes of this object from the database.
+      def reload
+        clear_association_cache
+        @attributes.update(self.class.find(self.id).instance_variable_get('@attributes'))
+        return self
+      end
+
       # Returns the value of attribute identified by <tt>attr_name</tt> after it has been type cast (for example, 
       # "2004-12-12" in a data column is cast to a date object, like Date.new(2004, 12, 12)).
       # (Alias for the protected read_attribute method).
@@ -1211,4 +1218,4 @@ module ActiveRecord #:nodoc:
         string[0..3] == "--- "
       end
   end
-end
\ No newline at end of file
+end
diff --git a/activerecord/test/base_test.rb b/activerecord/test/base_test.rb
index ccd9152e60..119be8d868 100755
--- a/activerecord/test/base_test.rb
+++ b/activerecord/test/base_test.rb
@@ -620,4 +620,13 @@ class BasicsTest < Test::Unit::TestCase
     @topics["first"].find.toggle!(:approved)
     assert @topics["first"].find.approved?
   end
-end
\ No newline at end of file
+
+  def test_reload
+    t1 = Topic.find(1)
+    t2 = Topic.find(1)
+    t1.title = "something else"
+    t1.save
+    t2.reload
+    assert_equal t1.title, t2.title
+  end
+end