Polyamorous::JoinDependency: wrong number of arguments (given 4, expected 3)

[23tux]

Gemfile

gem "rails", "~> 6.0.0.rc1"
gem "ransack", github: "activerecord-hackery/ransack"

When I call ransack on a model

Issue.ransack

I get this error:

wrong number of arguments (given 4, expected 3)

The stacktrace leads to this location:

alias_tracker = ::ActiveRecord::Associations::AliasTracker.create(self.klass.connection, relation.table.name, join_list)
join_dependency = if ::ActiveRecord::VERSION::STRING >= Constants::RAILS_6_0
  Polyamorous::JoinDependency.new(relation.klass, relation.table, association_joins, Arel::Nodes::OuterJoin)
else
  Polyamorous::JoinDependency.new(relation.klass, relation.table, association_joins)
end

activerecord (6.0.0.rc1) lib/active_record/associations/join_dependency.rb:67:in `initialize' 
ransack (e17f1c60a065) lib/ransack/adapters/active_record/context.rb:285:in `new' 
ransack (e17f1c60a065) lib/ransack/adapters/active_record/context.rb:285:in `build_joins' 
ransack (e17f1c60a065) lib/ransack/adapters/active_record/context.rb:239:in `join_dependency' 
ransack (e17f1c60a065) lib/ransack/adapters/active_record/ransack/context.rb:27:in `initialize' 
ransack (e17f1c60a065) lib/ransack/adapters/active_record/context.rb:10:in `initialize' 
ransack (e17f1c60a065) lib/ransack/adapters/active_record/ransack/context.rb:11:in `new' 
ransack (e17f1c60a065) lib/ransack/adapters/active_record/ransack/context.rb:11:in `for_class' 

[vrodokanakis]

See notice in README https://github.com/activerecord-hackery/ransack#rails-6-support and this issue #1032.

Until rc2 is released If you load Rails 6 from 6-0-stable branch it will work.

[scarroll32]

Closed as per message above.