validate_presence_of父屬性mongoid

Question

User.rb模型

class User 
    include Mongoid::Document 
    # relationships 
    has_one :post 

    #fields 
    field :name, :type => String 
    field :last_name, :type => String 
end 

Post.rb模型

class Post 
    include Mongoid::Document 

    # relationships 
    belongs_to :user 

    #fields 
    field :title, :type => String 
    field :description, :type => String 

    #validations here 

end 

之前創建一個帖子我想驗證用戶有name和last_name。另外，我想表現出錯誤，如果用戶還沒有name或last_name

這些驗證都與回調的模式進行，或者必須在控制器上執行？

謝謝！

Answer 1

class Post 
    include Mongoid::Document 

    # relationships 
    belongs_to :user 

    #fields 
    field :title, :type => String 
    field :description, :type => String 

    #validations here 
    validates_associated :user 
    validate :must_have_name 
    def must_have_name 
    if !(user.present? && (user.name.present? || user.last_name.present?)) 
     errors.add(:user, "add user name") 
    end 
    end 
end