Fixed invalid search link on the new project form (#20565).

git-svn-id: http://svn.redmine.org/redmine/trunk@14614 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/project_test.rb

@@ -142,6 +142,12 @@ class ProjectTest < ActiveSupport::TestCase
     assert_equal true, Project.find(1).identifier_frozen?
   end
 
+  def test_to_param_should_be_nil_for_new_records
+    project = Project.new
+    project.identifier = "foo"
+    assert_nil project.to_param
+  end
+
   def test_members_should_be_active_users
     Project.all.each do |project|
       assert_nil project.members.detect {|m| !(m.user.is_a?(User) && m.user.active?) }