node.js - 返回值未定义

Question

节点路线：

exports.addUser = async ( req, res, next ) => {
    const name = req.body.name;
    const email = req.body.email;
    const password = req.body.password;

    const unique = await User.isUserUnique( email );
    console.log( unique );

    bcrypt.hash( password, 10, function ( err, hash ) {
        const user = new User( name, email, hash );
        //user.saveUser();
    } );


    res.send( req.body );
};

模型：

const client = require( "../database/index" );

class User {
    constructor( name, email, password ) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    static isUserUnique( email ) {
        return client.connect( () => {
            return client.db( "alliance" ).collection( "users" ).findOne( { email } ).then( ( user ) => {
                return user;
            } );
        } );
    }

数据库：

const MongoClient = require( "mongodb" ).MongoClient;

const client = new MongoClient( url );

client.connect( function ( err ) {

    if ( err ) {
        console.log( err );
    }

    console.log( "Connected successfully to server" );

} );

module.exports = client;

为什么我在节点路由中声明的唯一常量未定义？它与“返回client.connect（（））”有关吗？基本上我希望静态方法返回用户，所以我假设你在静态方法中要做的就是返回每个值，这样它们就会上升到调用它的父级，然后我会在被调用的常量上得到它。我做了一些类似的事情，除了这次是使用 connect 方法作为周围的父级。

标签： node.jsmongodb