How to find what all associations have dependent: destroy associated with them from a concern

musicdenotation · July 18, 2015, 8:57am

I am building a soft delete solution a la

discourse/discourse/blob/main/app/models/concerns/trashable.rb

# frozen_string_literal: true

module Trashable
  extend ActiveSupport::Concern

  included do
    default_scope { where(deleted_at: nil) }
    scope :with_deleted, -> { unscope(where: :deleted_at) }
    scope :only_deleted, -> { with_deleted.where.not(deleted_at: nil) }

    belongs_to :deleted_by, class_name: "User"
  end

  def trashed?
    deleted_at.present?
  end

  def trash!(trashed_by = nil)
    # note, an argument could be made that the column should probably called trashed_at
    # however, deleted_at is the terminology used in the UI

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. Right now I am manually finding which all associated models need to be
deleted when a model is deleted and doing it manually in each model
which
of course is a not a good practice. How do I do it? I don’t want to use
a
gem, I want to write logic in my own hands.