我在udemy上做了一个关于Express和Mongoose的训练营，假设我们想在数据中添加新字段，我们做了这样的事情varplayground=require("../models/playground.js");route.post("/",middleware.isLoggedIn,function(req,res){varname=req.body.name;varimage=req.body.image;vardescription=req.body.description;varprice=req.body.price;playground.create({name:nam