[WIP] Ransack doesn't lookup scope when using groupings

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original issue description:

Ruby: 3.1.3
Rails: 7.0.4
Ransack: 3.2.1

Basic Setup

# -- Intervention Model --
class Intervention < ApplicationRecord

  belongs_to :father, class_name: "Intervention", foreign_key: "intervention_id", optional: true
  has_one :child, class_name: "Intervention", foreign_key: "intervention_id", dependent: :destroy

  scope :neither_father_nor_child, -> { where.missing(:father, :child) }

  def self.ransackable_scopes(auth_object = nil)
     %i[neither_father_nor_child]
  end
end

h = {:g=>{"0"=>{:neither_father_nor_child=>1}}}

Intervention.ransack(h) # => Ransack::Search<class: Intervention, base: Grouping <combinator: and>>
Intervention.ransack(h).result.to_sql # => SELECT \"interventions\".* FROM \"interventions\"

It is not calling the defined scope, but if i try

Intervention.ransack(neither_father_nor_child: 1) => # Ransack::Search<class: Intervention, scope: {"neither_father_nor_child"=>1}, base: Grouping <combinator: and>

So I don't know where is the problem

---

Additional instructions:

Add A PR with only a failing test

Fixes #1490

---

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.