為了定位錯誤，我將項目刪減到最簡，現在只留下index,在瀏覽器中報錯為Error:?failed?to?locate?view?"layout" ????at?Function.exports.compile?(/home/pc/project/mongooseLearning/node_modules/express/lib/view.js:61:15) ????at?ServerResponse.res._render?(/home/pc/project/mongooseLearning/node_modules/express/lib/view.js:417:18) ????at?ServerResponse.res.render?(/home/pc/project/mongooseLearning/node_modules/express/lib/view.js:318:17) ????at?ServerResponse.res._render?(/home/pc/project/mongooseLearning/node_modules/express/lib/view.js:432:10) ????at?ServerResponse.res.render?(/home/pc/project/mongooseLearning/node_modules/express/lib/view.js:318:17) ????at?/home/pc/project/mongooseLearning/app.js:47:7 ????at?callbacks?(/home/pc/project/mongooseLearning/node_modules/express/lib/router/index.js:272:11) ????at?param?(/home/pc/project/mongooseLearning/node_modules/express/lib/router/index.js:246:11) ????at?pass?(/home/pc/project/mongooseLearning/node_modules/express/lib/router/index.js:253:5) ????at?Router._dispatch?(/home/pc/project/mongooseLearning/node_modules/express/lib/router/index.js:280:5) ????這是我項目的截圖。我從始至終的文件里都沒有寫layout，但是它卻要去找layout文件，讓我很想不明白，這是為什么？