Optimistic locking: gracefully handle nil versions, treat as zero. Closes #5908.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4958 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 16 insertions, 0 deletions

diff --git a/activerecord/test/locking_test.rb b/activerecord/test/locking_test.rb
index 00df4bb8e4..80f0dc8496 100644
--- a/activerecord/test/locking_test.rb
+++ b/activerecord/test/locking_test.rb
@@ -2,6 +2,12 @@ require 'abstract_unit'
 require 'fixtures/person'
 require 'fixtures/legacy_thing'
 
+class LockWithoutDefault < ActiveRecord::Base; end
+
+class LockWithCustomColumnWithoutDefault < ActiveRecord::Base
+  set_locking_column :custom_lock_version
+end
+
 class OptimisticLockingTest < Test::Unit::TestCase
   fixtures :people, :legacy_things
 
@@ -56,6 +62,16 @@ class OptimisticLockingTest < Test::Unit::TestCase
     assert_equal 1, p1.lock_version
     assert_equal p1.lock_version, Person.new(p1.attributes).lock_version
   end
+  
+  def test_lock_without_default_sets_version_to_zero
+    t1 = LockWithoutDefault.new
+    assert_equal 0, t1.lock_version
+  end
+  
+  def test_lock_with_custom_column_without_default_sets_version_to_zero
+    t1 = LockWithCustomColumnWithoutDefault.new
+    assert_equal 0, t1.custom_lock_version
+  end
 end