我已经完成了 Michael Hartl Ruby on Rails 教程（适用于 Rails 3）
我正在尝试在 localhost:3000/users/admins 的页面上获取所有管理员用户的列表，但是当我去的时候出现错误给页面管理员。我在页面 localhost:3000/users 下还有一个所有用户的列表
我得到的错误如下：
ActiveRecord::RecordNotFound in UsersController#show
找不到用户 id=admins
app/controllers/users_controller.rb:7:in 'show'
参数：
{"id"=>"admins"}
在 Rails 控制台中，我可以使用该行调用用户管理属性admins = User.where(:admin => "t")
users_controller.rb
class UsersController < ApplicationController
before_filter :authenticate, :only => [:index, :edit, :update, :destroy]
before_filter :correct_user, :only => [:edit, :update]
before_filter :admin_user, :only => :destroy
def show
@user = User.find(params[:id])
@microposts = @user.microposts.paginate(:page => params[:page])
@title = @user.name
@admins = User.where(:admin => "t")
end
def new
@user = User.new
@title = "Sign up"
end
def create
@user = User.new(params[:user])
if @user.save
sign_in @user
flash[:success] = "Welcome to University Sports!"
redirect_to @user
else
@title = "Sign up"
render 'new'
end
end
def edit
@title = "Edit user"
end
def update
@user = User.find(params[:id])
if @user.update_attributes(params[:user])
flash[:success] = "Profile updated."
redirect_to @user
else
@title = "Edit user"
render 'edit'
end
end
def index
@users = User.paginate(:page => params[:page])
end
#def admins
# @users = User.admins
# render "users/index"
#end
def admins
@admins=User.where(:admin => "t")
end
def destroy
User.find(params[:id]).destroy
flash[:success] = "User destroyed."
redirect_to users_path
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 authenticate
deny_access unless signed_in?
end
def correct_user
@user = User.find(params[:id])
redirect_to(root_path) unless current_user?(@user)
end
def admin_user
redirect_to(root_path) unless current_user.admin?
end
end
路由.rb
FinalProject::Application.routes.draw do
get "club/new"
resources :users do
member do
get :following, :followers
end
end
resources :users do
collection do
get :admins
end
end
resources :sessions, :only => [:new, :create, :destroy]
resources :microposts, :only => [:create, :destroy]
resources :relationships, :only => [:create, :destroy]
get "sessions/new"
match '/signup', :to => 'users#new'
match '/signin', :to => 'sessions#new'
match '/signout', :to => 'sessions#destroy'
match '/sign_up', :to => 'pages#sign_up'
root :to => 'pages#home'
resources :users
match '/signup', :to => 'users#new'
end
用户.rb
class User < ActiveRecord::Base
attr_accessor :password
attr_accessible :name, :email, :password, :password_confirmation
has_many :microposts, :dependent => :destroy
has_many :relationships, :foreign_key => "follower_id", :dependent => :destroy
has_many :following, :through => :relationships, :source => :followed
has_many :reverse_relationships, :foreign_key => "followed_id", :class_name => "Relationship", :dependent => :destroy
has_many :followers, :through => :reverse_relationships, :source => :follower
email_regex = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
validates :name, :presence => true, :length => { :maximum => 50 }
validates :email, :presence => true, :format => { :with => email_regex }, :uniqueness => { :case_sensitive => false }
scope :admins, where(:admin => true)
# Automatically create the virtual attribute 'password_confirmation'.
validates :password, :presence => true, :confirmation => true, :length => { :within => 6..40 }
before_save :encrypt_password
def has_password?(submitted_password)
encrypted_password == encrypt(submitted_password)
end
def self.authenticate(email, submitted_password)
user = find_by_email(email)
return nil if user.nil?
return user if user.has_password?(submitted_password)
end
def self.authenticate_with_salt(id, cookie_salt)
user = find_by_id(id)
(user && user.salt == cookie_salt) ? user : nil
end
def following?(followed)
relationships.find_by_followed_id(followed)
end
def follow!(followed)
relationships.create!(:followed_id => followed.id)
end
def unfollow!(followed)
relationships.find_by_followed_id(followed).destroy
end
def feed
Micropost.from_users_followed_by(self)
end
private
def encrypt_password
self.salt = make_salt unless has_password?(password)
self.encrypted_password = encrypt(password)
end
def encrypt(string)
secure_hash("#{salt}--#{string}")
end
def make_salt
secure_hash("#{Time.now.utc}--#{password}")
end
def secure_hash(string)
Digest::SHA2.hexdigest(string)
end
end
admins.html.erb
<ul class="admins">
<%= render @admins %>
</ul>