小编har*_*n86的帖子

我正在尝试在Rails上运行一个应用程序,用于saas课程,作业2.每当我刷新页面时,我都会收到以下错误:

NoMethodError in MoviesController#index

undefined method `keys' for nil:NilClass
Rails.root: C:/Sites/RailsProjects/hw2_rottenpotatoes

Application Trace | Framework Trace | Full Trace
app/controllers/movies_controller.rb:24:in `block in index'
app/controllers/movies_controller.rb:23:in `each'
app/controllers/movies_controller.rb:23:in `index'

我的movies_controller.rb档案:

class MoviesController < ApplicationController

  def show
    id = params[:id] # retrieve movie ID from URI route
    @movie = Movie.find(id) # look up movie by unique ID
  end

  def index
    redirect = false

    if params[:sort]
      @sorting = params[:sort]
    elsif session[:sort]
      @sorting = session[:sort]
      redirect = true
    end

    if redirect
      redirect_to movies_path(:sort …