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                        /node+mongodb 建站攻略（一期）

Movie.fetch is not a function 是什么原因？

TypeError: Movie.fetch is not a function
at F:\Imooc\app.js:22:11
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
at Function.process_params (F:\Imooc\node_modules\express\lib\router\index.js:330:12)
at next (F:\Imooc\node_modules\express\lib\router\index.js:271:10)
at SendStream.error (F:\Imooc\node_modules\express\node_modules\serve-static\index.js:120:7)
at emitOne (events.js:77:13)
at SendStream.emit (events.js:169:7)
at SendStream.error (F:\Imooc\node_modules\express\node_modules\send\index.js:245:17)
at SendStream.onStatError (F:\Imooc\node_modules\express\node_modules\send\index.js:356:12)
at next (F:\Imooc\node_modules\express\node_modules\send\index.js:658:28)
at F:\Imooc\node_modules\express\node_modules\send\index.js:666:23
at FSReqWrap.oncomplete (fs.js:82:15)