Does not work on Rails edge

[tagliala]

Bisected to: https://github.com/rails/rails/commit/c477d95604e80e04d1aa8113a8236353235eb86a

rails/rails#43223

Steps to reproduce*

https://github.com/DavyJonesLocker/client_side_validations/actions/runs/6623856813/job/17991682062

Expected behavior*

Work

Actual behavior*

rails/activerecord/lib/active_record/validations/uniqueness.rb:287:in `validates_uniqueness_of': undefined method `_merge_attributes' for UserForm:Class (NoMethodError)

        validates_with UniquenessValidator, _merge_attributes(attr_names)
    from ~/dev/client_side_validations/test/active_record/models/user.rb:25:in `<class:UserForm>'
    from ~/dev/client_side_validations/test/active_record/models/user.rb:20:in `<top (required)>'

System configuration*

Rails version: edge

Ruby version: n/a

Client Side Validations version: edge

Code snippet from your model of the validations*

n/a

The whole form code from your template*

n/a

The resulting HTML*

n/a

Browser's development console output*

• [x] I confirm that my browser's development console output does not contain errors

Additional JavaScript Libraries*

n/a

Repository demostrating the issue

Debugging CSV issues is a time consuming task. If you want to speed up things, please provide a link to a repository showing the issue.

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* Failure to include this requirement may result in the issue being closed.