Fix for nested_attributes with has_many association fails when a single record is being updated.

[#5705 state:resolved]

Signed-off-by: José Valim <jose.valim@gmail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/activerecord/test/cases/nested_attributes_test.rb b/activerecord/test/cases/nested_attributes_test.rb
index 62e073ba8c..75ffd31de3 100644
--- a/activerecord/test/cases/nested_attributes_test.rb
+++ b/activerecord/test/cases/nested_attributes_test.rb
@@ -123,6 +123,14 @@ class TestNestedAttributesInGeneral < ActiveRecord::TestCase
     assert_equal 's1', ship.reload.name
   end
 
+ def test_has_many_association_updating_a_single_record
+    Man.accepts_nested_attributes_for(:interests)
+    man = Man.create(:name => 'John')
+    interest = man.interests.create(:topic => 'photography')
+    man.update_attributes({:interests_attributes => {:topic => 'gardening', :id => interest.id}})
+    assert_equal 'gardening', interest.reload.topic
+  end
+
 end
 
 class TestNestedAttributesOnAHasOneAssociation < ActiveRecord::TestCase