How to display all association collection in rails console? - ruby-on-rails

Question

I'd like to display in rails console all the collections of the parent entity "Article", which would be a relationship between itself, example:
# article.rb
class Article < ActiveRecord::Base
belongs_to :parent, :class_name => 'Article', optional: true
has_many :sub_articles, :class_name => 'Article', :foreign_key => 'parent_id'
end
Now what I have is:
irb(main):095:0> Article.find(1)
Article Load (0.9ms) SELECT "articles".* FROM "articles" ORDER BY
"articles"."id" ASC LIMIT $1 [["LIMIT", 1]]
=>
#<Articles:0x0000264231faa292
id: 1,
name: "king article"
created_at: Fri, 13 Aug 2021 13:14:26.463429000 UTC +00:00,
updated_at: Fri, 13 Aug 2021 13:14:26.463429000 UTC +00:00,
parent_id: nil
What I'd like to display on the rails console:
id: 1,
name: "king article"
created_at: Fri, 13 Aug 2021 13:14:26.463429000 UTC +00:00,
updated_at: Fri, 13 Aug 2021 13:14:26.463429000 UTC +00:00,
parent_id: nil
sub_articles:
[ Article:0x0000641428defb71
id: 2,
name: "pencils article"
created_at: Fri, 13 Aug 2021 13:14:26.463429000 UTC +00:00,
updated_at: Fri, 13 Aug 2021 13:14:26.463429000 UTC +00:00,
parent_id: 1
sub_articles:
[ Article:0x0000621438defb71
id: 3,
name: "pencil child 1"
created_at: Fri, 13 Aug 2021 13:14:26.463429000 UTC +00:00,
updated_at: Fri, 13 Aug 2021 13:14:26.463429000 UTC +00:00,
parent_id: 2
sub_articles: [],
id: 4,
name: "pencil child 2"
created_at: Fri, 13 Aug 2021 13:14:26.463429000 UTC +00:00,
updated_at: Fri, 13 Aug 2021 13:14:26.463429000 UTC +00:00,
parent_id: 2
sub_articles: []
]
]
Ultimately what I am looking for is if a parent is consulted to show their children (and the children of the children if possible)

Answer 1

It's probably best achieved by calling to_json on the top-level article, and configuring the as_json method of Article to include sub_articles
class Article < ActiveRecord::Base
def as_json(options={})
super(methods: [:subarticles])
end
end
in the rails console:
$> Article.find(3).to_json # => should give you the hierarchy you're looking for