Merge pull request #28092 from sikachu/fix-define_attribute_method-with-symbol-in-ar

Fix `define_attribute_method` with Symbol in AR

activemodel/lib/active_model/attribute_methods.rb

@@ -289,7 +289,7 @@ def define_attribute_method(attr_name)
             generate_method = "define_method_#{matcher.method_missing_target}"
 
             if respond_to?(generate_method, true)
-              send(generate_method, attr_name)
+              send(generate_method, attr_name.to_s)
             else
               define_proxy_call true, generated_attribute_methods, method_name, matcher.method_missing_target, attr_name.to_s
             end

activerecord/test/cases/attribute_methods_test.rb

@@ -866,6 +866,13 @@ def name
     assert subklass.method_defined?(:id), "subklass is missing id method"
   end
 
+  test "define_attribute_method works with both symbol and string" do
+    klass = Class.new(ActiveRecord::Base)
+
+    assert_nothing_raised { klass.define_attribute_method(:foo) }
+    assert_nothing_raised { klass.define_attribute_method("bar") }
+  end
+
   test "read_attribute with nil should not asplode" do
     assert_nil Topic.new.read_attribute(nil)
   end