From 41554319f8454f667b5e315339d3e286dbf6e1a4 Mon Sep 17 00:00:00 2001 From: Godfrey Chan Date: Thu, 13 Feb 2014 11:49:19 -0800 Subject: Fixed STI classes not defining an attribute method if there is a conflicting private method defined on its ancestors. The problem is that `method_defined_within?(name, klass, superklass)` only works correclty when `klass` and `superklass` are both `Class`es. If both `klass` and `superklass` are both `Class`es, they share the same inheritance chain, so if a method is defined on `klass` but not `superklass`, this method must be introduced at some point between `klass` and `superklass`. This does not work when `superklass` is a `Module`. A `Module`'s inheritance chain contains just itself. So if a method is defined on `klass` but not on `superklass`, the method could still be defined somewhere upstream, e.g. in `Object`. This fix works by avoiding calling `method_defined_within?` with a module while still fufilling the requirement (checking that the method is defined withing `superclass` but not is not a generated attribute method). 4d8ee288 is likely an attempted partial fix for this problem. This unrolls that fix and properly check the `superclass` as intended. Fixes #11569. --- activerecord/test/cases/attribute_methods_test.rb | 30 ++++++++++++++--------- 1 file changed, 19 insertions(+), 11 deletions(-) (limited to 'activerecord/test/cases') diff --git a/activerecord/test/cases/attribute_methods_test.rb b/activerecord/test/cases/attribute_methods_test.rb index 6c581a432f..aec1ea3972 100644 --- a/activerecord/test/cases/attribute_methods_test.rb +++ b/activerecord/test/cases/attribute_methods_test.rb @@ -728,19 +728,27 @@ class AttributeMethodsTest < ActiveRecord::TestCase assert "unknown attribute: hello", error.message end - def test_read_attribute_overwrites_private_method_not_considered_implemented - # simulate a model with a db column that shares its name an inherited - # private method (e.g. Object#system) - # - Object.class_eval do - private - def title; "private!"; end + def test_global_methods_are_overwritten + klass = Class.new(ActiveRecord::Base) do + self.table_name = 'computers' + end + + assert !klass.instance_method_already_implemented?(:system) + computer = klass.new + assert_nil computer.system + end + + def test_global_methods_are_overwritte_when_subclassing + klass = Class.new(ActiveRecord::Base) { self.abstract_class = true } + + subklass = Class.new(klass) do + self.table_name = 'computers' end - assert !@target.instance_method_already_implemented?(:title) - topic = @target.new - assert_nil topic.title - Object.send(:undef_method, :title) # remove test method from object + assert !klass.instance_method_already_implemented?(:system) + assert !subklass.instance_method_already_implemented?(:system) + computer = subklass.new + assert_nil computer.system end def test_instance_method_should_be_defined_on_the_base_class -- cgit v1.2.3