undefined method `read_attribute' after upgrading to Rails 8

[mbajur]

After upgrading my app to Rails 8, my contracts started throwing:

NoMethodError:
       undefined method `read_attribute' for an instance of Campaign::Contract::Update
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/reform-rails-0.3.1/lib/reform/form/active_model/validations.rb:235:in `method_missing'
# /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activerecord-8.0.4/lib/active_record/associations/builder/belongs_to.rb:134:in `block in define_validations'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:428:in `instance_exec'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:428:in `block in make_lambda'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:177:in `block in call'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:177:in `all?'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:177:in `call'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:559:in `block in invoke_before'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:559:in `each'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:559:in `invoke_before'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:108:in `run_callbacks'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:913:in `_run_validate_callbacks'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activemodel-8.0.4/lib/active_model/validations.rb:476:in `run_validations!'
     # /Users/mbajur/.local/share/mise/installs/ruby/3.3.5/lib/ruby/gems/3.3.0/gems/activemodel-8.0.4/lib/active_model/validations.rb:367:in `valid?'

I'm on:

• ruby 3.3.5
• reform 2.6.2
• reform-rails 0.3.1