`after_create_commit` can be invoked twice

after_create_commit_twice.rb

gem "sqlite3", "~> 1"
require 'sqlite3'
gem "activerecord", "~> 7.1"
require 'active_record'

# Set up a database that resides in RAM
ActiveRecord::Base.establish_connection(
  adapter: 'sqlite3',
  database: ':memory:'
)

# Set up database tables and columns
ActiveRecord::Schema.define do
  create_table "attachments", force: :cascade do |t|
  end

  create_table "blobs", force: :cascade do |t|
    t.belongs_to :attachment
    t.boolean :analyzed, default: false
  end
end

puts
puts

# Set up model classes
class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true
end

class Attachment < ApplicationRecord
  has_one :blob

  after_create_commit :analyze_later_callback

  def analyze_later_callback
    puts "#{self.class}##{__method__}"
    blob.analyze_later
  end
end

class Blob < ApplicationRecord
  belongs_to :attachment

  after_create_commit :scan_blob

  def analyze_later
    puts "#{self.class}##{__method__}"
    update!(analyzed: true) unless analyzed
  end

  def scan_blob
    puts "#{self.class}##{__method__}"
  end
end

Attachment.create!(blob: Blob.new)
# >> -- create_table("attachments", {:force=>:cascade})
# >>    -> 0.0068s
# >> -- create_table("blobs", {:force=>:cascade})
# >>    -> 0.0002s
# >> 
# >> 
# >> Attachment#analyze_later_callback
# >> Blob#analyze_later
# >> Blob#scan_blob
# >> Blob#scan_blob

Attachment.all
# => [#<Attachment:0x00000001208cc1e0 id: 1>]

Blob.all
# => [#<Blob:0x00000001208cba60 id: 1, attachment_id: 1, analyzed: true>]