blog 2-4

post_form.rb

class PostForm
  include Virtus
  include ActiveModel::Model

  #Post attributes
  attribute :title, String
  attribute :body,  String
  #Tag attributes
  attribute :tags,  Array[Integer], default: []

  #Validations
  validates :title, :body, presence: true

  def save
    if valid?
      persist!
    else
      false
    end
  end

  def update
    if valid?
      update!
    else
      false
    end
  end

  private

  def persist!
  end

  def update!
  end
end