Make ParamsWrapper calling newly introduced `Model.attribute_names` instead of `.column_names`

actionpack/lib/action_controller/metal/params_wrapper.rb

@@ -163,8 +163,8 @@ def _set_wrapper_defaults(options, model=nil)
 
         unless options[:only] || options[:except]
           model ||= _default_wrap_model
-          if !(model.respond_to?(:abstract_class?) && model.abstract_class?) && model.respond_to?(:column_names)
-            options[:only] = model.column_names
+          if model.respond_to?(:attribute_names) && model.attribute_names.present?
+            options[:only] = model.attribute_names
           end
         end
 

actionpack/test/controller/params_wrapper_test.rb

@@ -133,9 +133,8 @@ def test_nested_params
   end
 
   def test_derived_wrapped_keys_from_matching_model
-    User.expects(:respond_to?).with(:abstract_class?).returns(false)
-    User.expects(:respond_to?).with(:column_names).returns(true)
-    User.expects(:column_names).returns(["username"])
+    User.expects(:respond_to?).with(:attribute_names).returns(true)
+    User.expects(:attribute_names).twice.returns(["username"])
 
     with_default_wrapper_options do
       @request.env['CONTENT_TYPE'] = 'application/json'
@@ -146,9 +145,8 @@ def test_derived_wrapped_keys_from_matching_model
 
   def test_derived_wrapped_keys_from_specified_model
     with_default_wrapper_options do
-      Person.expects(:respond_to?).with(:abstract_class?).returns(false)
-      Person.expects(:respond_to?).with(:column_names).returns(true)
-      Person.expects(:column_names).returns(["username"])
+      Person.expects(:respond_to?).with(:attribute_names).returns(true)
+      Person.expects(:attribute_names).twice.returns(["username"])
 
       UsersController.wrap_parameters Person
 
@@ -159,8 +157,8 @@ def test_derived_wrapped_keys_from_specified_model
   end
 
   def test_not_wrapping_abstract_model
-    User.expects(:respond_to?).with(:abstract_class?).returns(true)
-    User.expects(:abstract_class?).returns(true)
+    User.expects(:respond_to?).with(:attribute_names).returns(true)
+    User.expects(:attribute_names).returns([])
 
     with_default_wrapper_options do
       @request.env['CONTENT_TYPE'] = 'application/json'
@@ -198,13 +196,13 @@ def parse
   end
 
   class SampleOne
-    def self.column_names
+    def self.attribute_names
       ["username"]
     end
   end
 
   class SampleTwo
-    def self.column_names
+    def self.attribute_names
       ["title"]
     end
   end