Question

我正在尝试为我的网站使用邀请。我想知道;我的第一个用户不需要邀请？我怎么能例外？我可以猜到，我必须使用救援例外，但我不知道必须在哪里完成？我的users.rb模型：

class User < ActiveRecord::Base
  attr_accessible :nickname, :email, :password, :password_confirmation, :invitation_token
  has_secure_password
  has_many :friendships
    has_many :friends, :through => :friendships
    has_many :inverse_friendships, :class_name => "Friendship", :foreign_key => "friend_id"
    has_many :inverse_friends, :through => :inverse_friendships, :source => :user

  has_many :topics, dependent: :destroy
  has_many :posts, dependent: :destroy

  before_save { |user| user.email = email.downcase }
  before_save { |user| user.nickname = nickname.downcase }
  before_save :create_remember_token

  validates :nickname, presence: true, length: { maximum: 150 }
  VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  validates :email, presence: true,
                                        format: { with: VALID_EMAIL_REGEX },
                                        uniqueness: {case_sensitive: false }

    validates :password, presence: true, length: { minimum: 6 }
  validates :password_confirmation, presence: true

    validates_presence_of :invitation_id, :message => 'gerekli'
    validates_uniqueness_of :invitation_id
    has_many :sent_invitations, :class_name => 'Invitation', :foreign_key => 'sender_id'
    belongs_to :invitation

    before_create :set_invitation_limit

    def invitation_token
        invitation.token if invitation
    end

    def invitation_token=(token)
        self.invitation = Invitation.find_by_token(token)
    end

    private

    def create_remember_token
        self.remember_token = SecureRandom.urlsafe_base64
    end

    def set_invitation_limit
        self.invitation_limit = 5
    end
end

这是users_controller.rb：

def new
  @user = User.new(:invitation_token => params[:invitation_token])
  @user.email = @user.invitation.recipient_email if @user.invitation
end

   def create
    @user = User.new(params[:user])
    if @user.save
      sign_in @user
      flash[:success] = "Giripedia'ya hoşgeldiniz'!"
      redirect_to @user
    else
      render 'new'
    end
  end

Answer 1

进行条件验证。让我举个简短的例子：

class User
  # ...
  validates_presence_of :invitation_id, :if => :invitation_needed?

  # An invitation is needed if there is at least one user. If there
  # are no users, there can't be an invitation.
  def invitation_needed?
    User.all.count >= 1
  end
end

详细信息：请参阅conditional validation

上的手册

Answer 2

我不确定为了能够保存您的第一个用户而编写条件验证是否是一个好主意。

每次验证用户时，您都不想进行计数查询。

您可以使用跳过验证选项从控制台保存您的第一个用户。

@user.save(:validate => false)

如何使用邀请列表模型构建第一个用户

2 个答案: