Рубин на Rails Tutorial раздел 9.4 (добавить администратора пользователя)

Question

Пожалуйста, помогите с ошибкой

Ошибка:

SyntaxError in UsersController#index 

app/views/users/_user.html.erb:4: syntax error, unexpected ')', expecting keyword_then or ';' or '\n' ...dmin? && !current_user?(user));@output_buffer.safe_append=' ...^

app/views/users/_user.html.erb:7: syntax error, unexpected keyword_end '.freeze;@output_buffer.append=(end);@output_buffer.safe_append='^

/app/views/users/_user.html.erb:10: syntax error, unexpected keyword_ensure, expecting ')' 

/app/views/users/_user.html.erb:12: syntax error, unexpected keyword_end, expecting ')' 

Мой /app/controllers/users_controller.rb:

class UsersController < ApplicationController 
    before_action :signed_in_user, only: [:index, :edit, :update, :destroy] 
    before_action :correct_user, only: [:edit, :update] 
    before_action :admin_user, only: :destroy 

    def new 
    @user = User.new 
    end 

    def index 
    # @users = User.paginate(:page => params[:page]) 
    @users = User.paginate(page: params[:page]) 
    end 

    def show 
    @user = User.find(params[:id]) 
    end 

    def create 
    @user = User.new(user_params) 
    if @user.save 
     sign_in @user 
     flash[:success] = "Welcome to the Sample App!" 
     redirect_to @user 
    else 
     render 'new' 
    end 
    end 

    def edit 
    # @user = User.find(params[:id]) 
    end 

    def update 
    if @user.update_attributes(user_params) 
     flash[:success] = "Profile updated" 
     redirect_to @user 
    else 
     render 'edit' 
    end 
    end 

    def destroy 
    User.find(params[:id]).destroy 
    flash.now[:success] = "User deleted." 
    redirect_to users_url 
    end 

    private 

    def user_params 
     params.require(:user).permit(:name, :email, :password, 
            :password_confirmation) 
    end 

    #Before filters 

    def signed_in_user 
     redirect_to signin_url, notice: "Please sign in." unless signed_in? 
    end 

    def correct_user 
     @user = User.find(params[:id]) 
     redirect_to(root_url) unless current_user?(@user) 
    end 

    def admin_user 
     redirect_to(root_url) unless current_user.admin? 
    end 
end 

приложение/просмотров/пользователей/_user.html .erb

<li> 
    <%= gravatar_for user, size: 52 %> 
    <%= link_to user.name, user %> 
    <%= if current_user.admin? && !current_user?(user) %> 
    | <%= link_to 'delete', user, method: :delete, 
            data: { confirm: "You sure?" } %> 
    <%= end %> 
</li> 

Answer 1

Chang е ваш app/views/users/_user.html.erb код на следующее:

<li> 
    <%= gravatar_for user, size: 52 %> 
    <%= link_to user.name, user %> 
    <% if current_user.admin? && !current_user?(user) %> 
     <%= link_to 'delete', user, method: :delete, 
        data: { confirm: "You sure?" } %> 
    <% end %> 
</li>