TypeError: F:\Imooc\views\pages\admin.jade:7
   5|         .row 
   6|             form.form-horizontal(method="post", action="/admin/movie/new") 
 > 7|                 input(type="hidden", name="movie[_id]", value="#{movie._id}") 
   8|                 .form-group 
   9|                     label.col-sm-2.control-label(for="inputTitle") 电影名字 
   10|                     .col-sm-10 

Cannot read property '_id' of undefined
   at eval (eval at <anonymous> (F:\Imooc\node_modules\jade\lib\index.js:218:8), <anonymous>:100:88)
   at eval (eval at <anonymous> (F:\Imooc\node_modules\jade\lib\index.js:218:8), <anonymous>:165:22)
   at res (F:\Imooc\node_modules\jade\lib\index.js:219:38)
   at Object.exports.renderFile (F:\Imooc\node_modules\jade\lib\index.js:380:38)
   at Object.exports.renderFile (F:\Imooc\node_modules\jade\lib\index.js:370:21)
   at View.exports.__express [as engine] (F:\Imooc\node_modules\jade\lib\index.js:417:11)
   at View.render (F:\Imooc\node_modules\express\lib\view.js:126:8)
   at tryRender (F:\Imooc\node_modules\express\lib\application.js:639:10)
   at EventEmitter.render (F:\Imooc\node_modules\express\lib\application.js:591:3)
   at ServerResponse.render (F:\Imooc\node_modules\express\lib\response.js:961:7)
   at F:\Imooc\app.js:47:9
   at Layer.handle [as handle_request] (F:\Imooc\node_modules\express\lib\router\layer.js:95:5)
   at next (F:\Imooc\node_modules\express\lib\router\route.js:131:13)
   at Route.dispatch (F:\Imooc\node_modules\express\lib\router\route.js:112:3)
   at Layer.handle [as handle_request] (F:\Imooc\node_modules\express\lib\router\layer.js:95:5)
   at F:\Imooc\node_modules\express\lib\router\index.js:277:22