Fixed that records fetched with piggy-back attributes or through rich…

… has_and_belongs_to_many associations couldn't be saved due to the extra attributes not part of the table #522 [Eric Anderson]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@483 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Fixed that records fetched with piggy-back attributes or through rich has_and_belongs_to_many associations couldn't be saved due to the extra attributes not part of the table #522 [Eric Anderson]
+
 * Added mass-assignment protection for the inheritance column -- regardless of a custom column is used or not
 
 * Fixed that association proxies would fail === tests like PremiumSubscription === @account.subscription

activerecord/lib/active_record/base.rb

@@ -1115,10 +1115,11 @@ def attributes_protected_by_default
       # an SQL statement. 
       def attributes_with_quotes(include_primary_key = true)
         columns_hash = self.class.columns_hash
-        @attributes.inject({}) do |attrs_quoted, pair| 
+        attrs_quoted = @attributes.inject({}) do |attrs_quoted, pair| 
           attrs_quoted[pair.first] = quote(pair.last, columns_hash[pair.first]) unless !include_primary_key && pair.first == self.class.primary_key
           attrs_quoted
         end
+        attrs_quoted.delete_if { | key, value | !self.class.columns_hash.keys.include?(key) }
       end
 
       # Quote strings appropriately for SQL statements.

activerecord/test/base_test.rb

@@ -114,7 +114,14 @@ def test_create
     topicReloaded = Topic.find(id)
     assert_equal("New Topic", topicReloaded.title)
   end
-
+
+  def test_create_columns_not_equal_attributes
+    topic = Topic.new
+    topic.title = 'Another New Topic'
+    topic.send :write_attribute, 'does_not_exist', 'test'
+    assert_nothing_raised { topic.save }
+  end
+
   def test_create_through_factory
     topic = Topic.create("title" => "New Topic")
     topicReloaded = Topic.find(topic.id)
@@ -140,6 +147,18 @@ def test_update
     assert_equal("Updated topic", topicReloadedAgain.title)
   end
 
+  def test_update_columns_not_equal_attributes
+    topic = Topic.new
+    topic.title = "Still another topic"
+    topic.save
+    id = topic.id
+
+    topicReloaded = Topic.find(id)
+    topicReloaded.title = "A New Topic"
+    topicReloaded.send :write_attribute, 'does_not_exist', 'test'
+    assert_nothing_raised { topicReloaded.save }
+  end
+
   def test_preserving_date_objects
     # SQL Server doesn't have a separate column type just for dates, so all are returned as time
     if ActiveRecord::ConnectionAdapters.const_defined? :SQLServerAdapter