validates的条件验证（if）的Proc用法

最新推荐文章于 2025-12-05 16:17:44 发布

原创最新推荐文章于 2025-12-05 16:17:44 发布 · 744 阅读

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本文介绍了一个认证系统的实现方式，包括数据库结构、验证逻辑及用户邀请流程。重点讲解了针对不同认证方式（如电子邮件和电话号码）的处理方法。

实例：

authentication.rb中

# == Schema Information
#
# Table name: authentications
#
# id :integer not null, primary key
# user_id :integer not null
# provider :string(255) not null
# uid :string(255) not null
# created_at :datetime
# updated_at :datetime
# country_code :string(255)
#

class Authentication < ActiveRecord::Base

belongs_to :user

scope :email_auth, -> {where(provider: "email")}
scope :phone_auth, -> {where(provider: "phone")}

validates :uid, format: /@/, if: Proc.new { |auth| auth.provider == "email" }

after_create :accept_invitation

def accept_invitation
if provider == 'phone'
if @invitation = Invitation.where(status: 'not_registered', country_code: country_code, phone_number: uid).first
@invitation.update(user_id: user_id, status: 'registered')
PointRecord.point_for_accept_invitation(user, @invitation)
end
end
end

def self.phone_register?(phone, country_code = "+86")
Authentication.find_by(provider: "phone", uid: phone, country_code: country_code).present?
end

def self.email_register?(email)
Authentication.find_by(provider: "email", uid: email)
end


end

****************validates :uid, format: /@/, if: Proc.new { |auth| auth.provider == "email" }

注意这一句：

官方文档解释是

:if - Specifies a method, proc or string to call to determine if the validation should occur (e.g. if: :allow_validation, or if: Proc.new { |user| user.signup_step > 2 }). The method, proc or string should return or evaluate to a true or false value.

也就是条件if是对Authentication的实例对象也就是Proc传入的auth的provider字段进行验证