How to unsave an object in Rails?

Question

ruby

Hello!
There is such a situation:

class CheckerResult < ApplicationRecord
  has_many :checker_errors, dependent: :destroy
  ###
end
class CheckerError < ApplicationRecord
  belongs_to :checker_result
  ###
end

checker_result = CheckerResult.new(...)

# Создается несколько таких checker_error
checker_result.checker_errors.new(...)
checker_result.checker_errors.new(...)

checker_result.save

It is necessary that checker_error has some method that checks the value of the field, and depending on its value, can delete itself (cancel the creation), somehow ignore the creation.
Schematically:

class CheckerError < ApplicationRecord
  belongs_to :checker_result
  ###
  def delete_if_some
    отменить_создание_себя if условие
  end
end

Tried these options:

before_create do
  throw(:abort) if условие
end

before_create do
  destroy if условие
end

but they don't fit.
Probably not explained very clearly. Thanks in advance!

Answer 1

We wrap the code in a transaction to be able to undo the changes.

ActiveRecord::Base.transaction do
  checker_result.save
end

In the right place, we call ActiveRecord::Rollback and the transaction is canceled.

class CheckerError < ApplicationRecord
  belongs_to :checker_result

  def delete_if_some
    raise ActiveRecord::Rollback 
  end
end