Fixed that form elements would strip the trailing [] from the first parameter...

Fixed that form elements would strip the trailing [] from the first parameter (closes #3545) [ruby@bobsilva.com]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3661 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

 *SVN*
 
+* Fixed that form elements would strip the trailing [] from the first parameter #3545 [ruby@bobsilva.com]
+
 * During controller resolution, update the NameError suppression to check for the expected constant. [Nicholas Seckar]
 
 * Update script.aculo.us to V1.5.3 [Thomas Fuchs]

actionpack/lib/action_view/helpers/form_helper.rb

@@ -231,7 +231,7 @@ class InstanceTag #:nodoc:
       DEFAULT_DATE_OPTIONS = { :discard_type => true }.freeze unless const_defined?(:DEFAULT_DATE_OPTIONS)
 
       def initialize(object_name, method_name, template_object, local_binding = nil, object = nil)
-        @object_name, @method_name = object_name.to_s, method_name.to_s
+        @object_name, @method_name = object_name.to_s.dup, method_name.to_s.dup
         @template_object, @local_binding = template_object, local_binding
         @object = object
         if @object_name.sub!(/\[\]$/,"")

actionpack/test/template/form_helper_test.rb

@@ -68,6 +68,13 @@ def test_text_field_assuming_size
     assert_dom_equal expected, text_field("post", "title", :maxlength => 35)
   end
 
+  def test_text_field_doesnt_change_param_values
+    object_name = 'post[]'
+    expected = '<input id="post_123_title" name="post[123][title]" size="30" type="text" value="Hello World" />'
+    assert_equal expected, text_field(object_name, "title")
+    assert_equal object_name, "post[]"
+  end
+
   def test_check_box
     assert_dom_equal(
       '<input checked="checked" id="post_secret" name="post[secret]" type="checkbox" value="1" /><input name="post[secret]" type="hidden" value="0" />',