javascript - Sequelize : Object does not return after creation. 无错误。数据库中存在的对象

Question

对象在数据库中创建，但未返回。没有错误。

User 是唯一发生这种情况的table。日志记录已开启。

用户模型:

module.exports = function (sequelize, DataTypes) {
    var User = sequelize.define("User", {
        email: {
            type: DataTypes.STRING,
            allowedNull: false,
            unique: true,
            validate: {
                isEmail: true
            }
        },
        username: {
            type: DataTypes.STRING,
            allowedNull: true,
            unique: true,
            validate: {
                len: [4, 50]
            }
        },
        first_name: {
            type: DataTypes.STRING,
            allowedNull: true,
            validate: {
                len: [2, 50]
            }
        },
        last_name: {
            type: DataTypes.STRING,
            allowedNull: true,
            validate: {
                len: [2, 50]
            }
        },         
    }, {
            tableName: 'User',
            charset: 'utf8mb4',
            collate: 'utf8mb4_unicode_ci',
            ........

User 模型中没有 afterCreate Hook 。

当我调用下面的代码时，会创建一个 User 对象，但是它不会返回:

 db.User.create({email: body.email}).then((userCreated) => {
                   // userCreated Object is never returned, but an Object in the DB is created.  
                    console.log("User Created " + userCreated)
                }).catch((errorCreatingUser) => {
                // No Error is returned either
                    console.log("user error " + errorCreatingUser)
                })
                console.log("Outside of the block ")

以下是日志:

Executing (default): SELECT `id`, `email`, `username`, `first_name`, `last_name`, `createdAt`, `updatedAt` FROM `User` AS `User` WHERE `User`.`email` = 'example@example.com' LIMIT 1;
sequelize.js:1344
Outside of the block 
controller.js:478
Executing (default): INSERT INTO `User` (`id`,`email`,`createdAt`,`updatedAt`) VALUES (DEFAULT,'example@example.com','2019-09-02 16:01:29','2019-09-02 16:01:29');

您知道我做错了什么或故障排除建议吗？

更新了整个流程代码

router.post('/login', (req, res) => {
    var _ = req.app.get('_')
    var body = _.pick(req.body, 'username', 'email');
    var db = req.app.get('db');


    db.User.create({email: body.email}).then((userCreated) => {
        console.log("User Created " + userCreated)
    }).catch((errorCreatingUser) => {
        console.log("user error " + errorCreatingUser)
    })
    console.log("Out of the block ")
})

Answer 1

我认为您不清楚 Node 的 promise 或异步流程，在代码中我已经按顺序注释了它将如何执行的数字

当同步模式下没有剩余进程时将执行4。

console.log("Before Create");   //<------------- 1
return db.User.create({ email: body.email}) //<------------- 2
.then((userCreated) => { //<------------- 4 ( if scuccess )
  // userCreated Object is never returned, but an Object in the DB is created.  
  console.log("User Created " + userCreated) 
}).catch((errorCreatingUser) => { //<------------- 4 ( if failed )
  // No Error is returned either
  console.log("user error " + errorCreatingUser)
})
console.log("Outside of the block "); //<------------- 3

<小时/>

尝试运行以下代码:

router.post('/login', (req, res) => {
    var _ = req.app.get('_')
    var body = _.pick(req.body, 'username', 'email');
    var db = req.app.get('db');


    return db.User.create({email: body.email}).then((userCreated) => { // <--------- Add return
        console.log("User Created " + userCreated);
        return userCreated; // <--------- Add return
    }).catch((errorCreatingUser) => { 
        console.log("user error " + errorCreatingUser)
    })
    console.log("Out of the block ")
})