Incorrect human_attribute_name in case of single table inheritance (STI)

[kalsan]

Hi!

The following is a bug report. When calling .human_attribute_name(...) on an STI child class in Rails, gettext_i18n_rails looks up the wrong constant. Here's an example:

class Parent < ApplicationRecord; end
class Child < Parent; end

Assuming that Parent has a field :foo which it shares with Child via STI. Translations are (app.po):

msgid "Parent|Foo"
msgstr "Parent's Foo"

msgid "Child|Foo"
msgstr "Child's Foo"

Expected:

Parent.human_attribute_name(:foo) # Parent's foo
Child.human_attribute_name(:foo) # Child's foo

However, gettext_i18n_rails returns:

Parent.human_attribute_name(:foo) # Parent's foo
Child.human_attribute_name(:foo) # Parent's foo --> WRONG

Best,
Kalsan

[grosser]

yeah kinda bad ... PR welcome, ideally this would be a fallback from Child|foo to Parent|foo to not break existing behavior, or an opt-in