Make Relation#create_with always merge rather than overwrite, not just when merging two relations. If you wish to overwrite, you can do relation.create_with(nil), or for a specific attribute, relation.create_with(:attr => nil).

1 files changed, 10 insertions, 0 deletions

diff --git a/activerecord/test/cases/relation_scoping_test.rb b/activerecord/test/cases/relation_scoping_test.rb
index 7c6899d438..bff0151f1a 100644
--- a/activerecord/test/cases/relation_scoping_test.rb
+++ b/activerecord/test/cases/relation_scoping_test.rb
@@ -491,5 +491,15 @@ class DefaultScopingTest < ActiveRecord::TestCase
              PoorDeveloperCalledJamis.create_with(:name => 'Aaron')).new
     assert_equal 20, aaron.salary
     assert_equal 'Aaron', aaron.name
+
+    aaron = PoorDeveloperCalledJamis.create_with(:name => 'foo', :salary => 20).
+                                     create_with(:name => 'Aaron').new
+    assert_equal 20, aaron.salary
+    assert_equal 'Aaron', aaron.name
+  end
+
+  def test_create_with_reset
+    jamis = PoorDeveloperCalledJamis.create_with(:name => 'Aaron').create_with(nil).new
+    assert_equal 'Jamis', jamis.name
   end
 end