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Transactionally Create Parent + Children with accepts_nested_attributes_for

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                  class Snip < ApplicationRecord
  has_many :code_blocks, inverse_of: :snip, dependent: :destroy
  accepts_nested_attributes_for :code_blocks, reject_if: :all_blank, allow_destroy: true

  validates :title, presence: true
  validates :code_blocks, presence: true
end

                  class SnipsController < ApplicationController
  def create
    @snip = current_member.snips.new(snip_params)
    @snip.save!
    redirect_to @snip
  end

  private

  def snip_params
    params.require(:snip).permit(:title, :content, code_blocks_attributes: %i[id name hljs_language code _destroy])
  end
end

Nested writes should be transactional: either everything is created or nothing is. Rails does this well when you keep validations coherent and avoid side effects in callbacks.

Sarah Chen

More from Sarah Chen

Transactionally Create Parent + Children with accepts_nested_attributes_for

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More from Sarah Chen