Ticket #8422: filter_params_value_nil.patch

actionpack/test/controller/filter_params_test.rb

@@ -16 +16 @@
-    assert @controller.respond_to?(:filter_parameters)
-    
-    test_hashes = [[{},{},[]],
+    [{'foo'=>nil},{'foo'=>nil},[]],
-    [{'foo'=>'bar'},{'foo'=>'bar'},[]],
-    [{'foo'=>'bar'},{'foo'=>'bar'},%w'food'],
-    [{'foo'=>'bar'},{'foo'=>'[FILTERED]'},%w'foo'],

actionpack/lib/action_controller/base.rb

@@ -441 +441 @@
-            elsif value.is_a?(Hash)
-              filtered_parameters[key] = filter_parameters(value)
-            elsif block_given?
-value.dup
+(value ? value.dup : nil)
-              yield key, value
-              filtered_parameters[key] = value
-            else