Question

我在Michael Hartl的书上做样本应用程序，在第11章中有一些错误

显示/home/andrey/RoR/sample_app/app/views/shared/_stats.html.erb第5行提出：

未知验证者：'PresenseValidator'

提取的来源（第5行）：

5＆lt;％= @ user.followed_users.count％＆gt;

模板包含跟踪：app / views / static_pages / home.html.erb

Rails.root：/ home / andrey / RoR / sample_app 应用程序跟踪|框架跟踪|完整跟踪

app / models / relationship.rb：4：<class:Relationship>' app/models/relationship.rb:1:in' app / views / shared / _stats.html.erb：5：in _app_views_shared__stats_html_erb__765092261__621887978' app/views/static_pages/home.html.erb:8:in _ app_views_static_pages_home_html_erb__496074363__614039518'

user.rb

class User＆lt;的ActiveRecord :: Base的 has_many：microposts，dependent :: destroy has_many：relationships，foreign_key：“follower_id”，依赖:: destroy has_many：followed_users，through :: relationship，source ::: follow has_many：reverse_relationships，foreign_key：“followed_id”，class_name：“Relationships”，依赖:: destroy has_many：关注者，通过:: reverse_relationships，source :: follower

before_save {self.email = email.downcase} before_create：create_remember_token

验证：name，presence：true，length：{maximum：50}

VALID_EMAIL_REGEX = / \ A [\ w + - 。] + @ [a-z \ d - ] +（。[a-z] +）*。[a-z] + \ z / i

验证：电子邮件，在线状态：是，格式：{with：VALID_EMAIL_REGEX}，唯一性：{case_sensitive：false}

has_secure_password

验证：密码，长度：{minimum：6}

def User.new_remember_token SecureRandom.urlsafe_base64 端

def User.encrypt（令牌）摘要:: SHA1.hexdigest（token.to_s）端

def feed Micropost.where（“user_id =？”，id）端

def def？（other_user） relationships.find_by（followed_id：other_user.id）端

def def！（other_user） relationships.create！（follow_id：other_user.id）端

def deffollow！（other_user） relationships.find_by（followed_id：other_user.id）.destroy！端

私有

def create_remember_token
  self.remember_token = User.encrypt(User.new_remember_token)
end

端

stats.erb.html

 <% @user ||= current_user %>
 <div class="stats">
 <a href="<%= following_user_path(@user) %>">
 <strong id="following" class="stat">
  <%= @user.followed_users.count %>
 </strong>
 following
 </a>
 <a href="<%= followers_user_path(@user) %>">
 <strong id="followers" class="stat">
  <%= @user.followers.count %>
 </strong>
 followers
 </a>
 </div>

relationship.rb

类关系＆lt;的ActiveRecord :: Base的 belongs_to：follower，class_name：“User” belongs_to：follow，class_name：“User” 验证：follower_id，presense：true 验证：follows_id，presense：true 端

Answer 1

你的关系中有拼写错误.rb

validates :follower_id, presense: true 
validates :followed_id, presense: true

应该是

validates :follower_id, presence: true
validates :followed_id, presence: true

第11章迈克尔哈特尔错误

1 个答案: