问NoMethodError in BlogsController#show

EN

class BlogsController < ApplicationController
  before_action :set_blog, only: [:show, :edit, :update, :destroy]
  before_action :authenticate_user!, only: [:new, :create, :edit, :update, :destroy]

  def index
    @blog = Blog.all 
  end

  def new 
    @blog = Blog.new
  end 

  def create
    current_user.blogs.create(blog_params)
    redirect_to blogs_path
  end 

  def show 
    @blog = Blog.friendly.find(params[:id])
  end

  def edit
    @blog = Blog.friendly.find(params[:id])
    if @blog.user != current_user
      return render text: 'Not Allowed', status: :forbidden
    end
  end

  def update
    @blog = Blog.friendly.find(params[:id])

    if @blog.user != current_user
      return render text: 'Not Allowed', status: :forbidden
    end

    @blog.update_attributes(blog_params)
    redirect_to root_path
  end

  def destroy
    @blog = Blog.friendly.find(params[:id])
    if @blog.user != current_user
      return render text: 'Not Allowed', status: :forbidden
    end

    @blog.destroy
    redirect_to root_path
  end

private

  def blog_params
    params.require(:blog).permit(:name, :description)
  end
end

Rails.application.routes.draw do
  devise_for :users
  resources :blogs
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
  root 'portfolio#index'

end

class Blog < ApplicationRecord
  extend FriendlyId
  friendly_id :name, use: :slugged

  belongs_to :user
end