Unexpected behaviour of @subtype.cast ??

[chrhsmt]

I have found some behavior changes as a result of updating from 2.7.0 to 2.8.0.
When assigning to a field using enum key, the value is no longer set, is this the expected behavior?
It just seemed like a bug to me....

2.7.0

class Sample < ApplicationRecord
  extend Enumerize
  enumerize :code, in: {
    initial: 1,
    start: 2,
    finish: 3,
  }
end

o = Sample.new
o["code"] = "start"
o
#<Sample:0x0000000129696db8> {
              :id => nil,
            :code => "start",
      :created_at => nil,
      :updated_at => nil
}

2.8.0

class Sample < ApplicationRecord
  extend Enumerize
  enumerize :code, in: {
    initial: 1,
    start: 2,
    finish: 3,
  }
end

o = Sample.new
o["code"] = "start"
o
#<Sample:0x000000012244f570> {
              :id => nil,
            :code => nil, # 👈
      :created_at => nil,
      :updated_at => nil
}

The following commit seems to have affected this.
018c5a4

enumerize/lib/enumerize/activerecord.rb

Line 119 in 018c5a4

@attr.find_value(@subtype.cast(value))

[chrhsmt]

This is code to reproduce.

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  gem "rails"
  # If you want to test against edge Rails replace the previous line with this:
  # gem "rails", github: "rails/rails", branch: "main"

  gem "sqlite3", "~> 1.4"
  gem "enumerize", "2.8.0"
end

require "active_record"
require "minitest/autorun"
require "logger"

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :samples, force: true do |t|
    t.integer :code
  end
end

class Sample < ActiveRecord::Base
  extend Enumerize
  enumerize :code, in: {
    initial: 1,
    start: 2,
    finish: 3,
  }
end

class BugTest < Minitest::Test
  def test_enum_assignment
    sample = Sample.new
    sample["code"] = "start"
    assert_equal "start", sample.code
  end
end