我正在从事类似于Twitter克隆的项目。我到处寻找其他有相同错误的消息，但无法找到此问题的另一个示例。但是，我遇到了以下错误：
int &模板包含的痕迹：app / views / users / show.html.erb
undefined method `following' for #<User:0x000055ae42d0d158
提取的来源（第5行附近）：
app/views/shared/_stats.html.erb:5:in
`_app_views_shared__stats_html_erb__231770652215433765_47103466733040'
app/views/users/show.html.erb:11:in `_app_views_users_show_html_erb___1734427599225406369_47103466794880'
Here is user model:
第二个错误在第11行上的位置：
<% @user ||= current_user %>
<div class="stats">
<a href="<%= following_user_path(@user) %>">
<strong id="following" class="stat">
<%= @user.following.count %>
</strong>
following
</a>
<a href="<%= followers_user_path(@user) %>">
<strong id="followers" class="stat">
<%= @user.followers.count %>
</strong>
followers
</a>
</div>
这是我的控制人：
<% provide(:title, @user.name) %>
<div class="row">
<aside class="col-md-4">
<section>
<h1>
<%= gravatar_for @user %>
<%= @user.name %>
</h1>
</section>
<section class="stats">
<%= render 'shared/stats' %>
</section>
</aside>
<div class="col-md-8">
<%= render 'follow_form' if logged_in? %>
<% if @user.microposts.any? %>
<h3>Microposts (<%= @user.microposts.count %>)</h3>
<ol class="microposts">
<%= render @microposts %>
</ol>
<%= will_paginate @microposts %>
<% end %>
</div>
</div>
这是我的用户模型：
class UsersController < ApplicationController
before_action :logged_in_user, only: [:index, :edit, :update, :destroy, :following, :followers]
before_action :correct_user, only: [:edit, :update]
before_action :admin_user, only: :destroy
def index
@users = User.where(activated: true).paginate(page: params[:page])
end
def new
@user = User.new
end
def show
@user = User.find(params[:id])
@microposts = @user.microposts.paginate(page: params[:page])
end
def create
@user = User.new(user_params) # Not the final implementation!
if @user.save
@user.send_activation_email
flash[:info] = "Please check your email to activate your account."
redirect_to root_url
else
render 'new'
end
end
def edit
@user = User.find(params[:id])
end
def update
@user = User.find(params[:id])
if @user.update_attributes(user_params)
flash[:success] = "Profile updated"
redirect_to @user
# Handle a successful update.
else
render 'edit'
end
end
def destroy
User.find(params[:id]).destroy
flash[:success] = "User deleted"
redirect_to users_url
end
# Confirms an admin user.
def admin_user
redirect_to(root_url) unless current_user.admin?
end
def following
@title = "Following"
@user = User.find(params[:id])
@users = @user.following.paginate(page: params[:page])
render 'show_follow'
end
def followers
@title = "Followers"
@user = User.find(params[:id])
@users = @user.followers.paginate(page: params[:page])
render 'show_follow'
end
private
def user_params
params.require(:user).permit(:name, :email, :password,
:password_confirmation)
end
# Confirms the correct user.
def correct_user
@user = User.find(params[:id])
redirect_to(root_url) unless current_user?(@user)
end
end
这是关系模型：
class User < ApplicationRecord
has_many :microposts, dependent: :destroy
attr_accessor :remember_token, :activation_token, :reset_token
attr_accessor :remember_token, :activation_token
before_save :downcase_email
before_create :create_activation_digest
validates :name, presence: true, length: { maximum: 50 }
VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-]+(\.[a-z\d\-]+)*\.[a-z]+\z/i
validates :email, presence: true, length: { maximum: 255 },
format: { with: VALID_EMAIL_REGEX },
uniqueness: { case_sensitive: false }
has_secure_password
validates :password, presence: true, length: { minimum: 6 }, allow_nil: true
# Returns the hash digest of the given string.
def self.digest(string)
cost = ActiveModel::SecurePassword.min_cost ? BCrypt::Engine::MIN_COST :
BCrypt::Engine.cost
BCrypt::Password.create(string, cost: cost)
end
# Returns a random token.
def self.new_token
SecureRandom.urlsafe_base64
end
# Remembers a user in the database for use in persistent sessions.
def remember
self.remember_token = User.new_token
update_attribute(:remember_digest, User.digest(remember_token))
end
# Returns true if the given token matches the digest.
def authenticated?(attribute, token)
digest = send("#{attribute}_digest")
return false if digest.nil?
BCrypt::Password.new(digest).is_password?(token)
end
# Forgets a user.
def forget
update_attribute(:remember_digest, nil)
end
# Activates an account.
def activate
update_attribute(:activated, true)
update_attribute(:activated_at, Time.zone.now)
end
# Sends activation email.
def send_activation_email
UserMailer.account_activation(self).deliver_now
end
# Sets the password reset attributes.
def create_reset_digest
self.reset_token = User.new_token
update_attribute(:reset_digest, User.digest(reset_token))
update_attribute(:reset_sent_at, Time.zone.now)
end
# Sends password reset email.
def send_password_reset_email
UserMailer.password_reset(self).deliver_now
end
# Returns true if a password reset has expired.
def password_reset_expired?
reset_sent_at < 2.hours.ago
end
# Defines a proto-feed.
# See "Following users" for the full implementation.
def feed
Micropost.where("user_id = ?", id)
end
private
# Converts email to all lower-case.
def downcase_email
self.email = email.downcase
end
# Creates and assigns the activation token and digest.
def create_activation_digest
self.activation_token = User.new_token
self.activation_digest = User.digest(activation_token)
end
end
这是我的数据库模式：
class Relationship < ApplicationRecord
belongs_to :follower, class_name: "User"
belongs_to :followed, class_name: "User"
validates :follower_id, presence: true
validates :followed_id, presence: true
end
答案 0 :(得分：2)
在您提供的源代码中，User模型既没有.followers也没有.following方法。
可以通过与has many模型的双重Relationship关联来定义适当的关联。
has_many :relationships_as_follower, foreign_key: :follower_id, class_name: "Relationship"
has_many :relationships_as_followed, foreign_key: :followed_id, class_name: "Relationship"
has_many :followers, through: :relationships_as_followed, source: :follower
has_many :following, through: :relationships_as_follower, source: :followed
请考虑将following和followed重命名为其他名称，以避免混淆。