throw new MongooseError(‘Mongoose.prototype.connect() no longer accepts a callback‘)；

const mongoose = require("mongoose")
mongoose.connect("mongodb://127.0.0.1/student", (err) => {
    if (err) {
        return console.log(err);
    } else {
        console.log("数据库连接成功");
    }
})
// 抛出
module.exports = mongoose

const mongoose = require("mongoose")
// 消除严格模式
mongoose.set("strictQuery", true)
mongoose.connect("mongodb://127.0.0.1/interview")
const conn = mongoose.connection
conn.on("open", () => {
    console.log("ok");
})
conn.on("error", (err) => {
    console.log(err);
})
// 抛出
module.exports = mongoose