Javascript Sequelize can'；我不能创建表，但当我在MySQL CLI中运行相同的表时，它可以工作

我正在使用sequelize，遇到了一个奇怪的错误：

Executing (default): CREATE TABLE IF NOT EXISTS `groups` (`id` INTEGER NOT NULL auto_increment , `groupname` VARCHAR(255), `groupkey` VARCHAR(255), `createdAt` DATETIME NOT NULL, `updatedAt` DATETIME NOT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB;
Executing (default): CREATE TABLE IF NOT EXISTS `users` (`id` INTEGER NOT NULL auto_increment , `username` VARCHAR(255) UNIQUE, `password` VARCHAR(255), `salt` VARCHAR(255), `token` VARCHAR(255), `group_id` INTEGER, `createdAt` DATETIME NOT NULL, `updatedAt` DATETIME NOT NULL, PRIMARY KEY (`id`), FOREIGN KEY (`group_id`) REFERENCES `groups` (`id`)) ENGINE=InnoDB;
Executing (default): CREATE TABLE IF NOT EXISTS `messages` (`id` INTEGER NOT NULL auto_increment , `message` VARCHAR(255), `group_id` INTEGER, `user_id` INTEGER, `createdAt` DATETIME NOT NULL, `updatedAt` DATETIME NOT NULL, PRIMARY KEY (`id`), FOREIGN KEY (`group_id`) REFERENCES `groups` (`id`), FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)) ENGINE=InnoDB;
Possibly unhandled SequelizeDatabaseError: ER_CANT_CREATE_TABLE: Can't create table 'crew.users' (errno: 150)
    at module.exports.Query.formatError (/home/ubuntu/public/server/node_modules/sequelize/lib/dialects/mysql/query.js:160:16)
    at Query._callback (/home/ubuntu/public/server/node_modules/sequelize/lib/dialects/mysql/query.js:38:23)
    at Query.Sequence.end (/home/ubuntu/public/server/node_modules/mysql/lib/protocol/sequences/Sequence.js:96:24)
    at Query.ErrorPacket (/home/ubuntu/public/server/node_modules/mysql/lib/protocol/sequences/Query.js:94:8)
    at Protocol._parsePacket (/home/ubuntu/public/server/node_modules/mysql/lib/protocol/Protocol.js:271:23)
    at Parser.write (/home/ubuntu/public/server/node_modules/mysql/lib/protocol/Parser.js:77:12)
    at Protocol.write (/home/ubuntu/public/server/node_modules/mysql/lib/protocol/Protocol.js:39:16)
    at Socket.<anonymous> (/home/ubuntu/public/server/node_modules/mysql/lib/Connection.js:82:28)
    at Socket.EventEmitter.emit (events.js:95:17)
    at Socket.<anonymous> (_stream_readable.js:746:14)
Possibly unhandled SequelizeDatabaseError: ER_CANT_CREATE_TABLE: Can't create table 'crew.messages' (errno: 150)
    at module.exports.Query.formatError (/home/ubuntu/public/server/node_modules/sequelize/lib/dialects/mysql/query.js:160:16)
    at Query._callback (/home/ubuntu/public/server/node_modules/sequelize/lib/dialects/mysql/query.js:38:23)
    at Query.Sequence.end (/home/ubuntu/public/server/node_modules/mysql/lib/protocol/sequences/Sequence.js:96:24)
    at Query.ErrorPacket (/home/ubuntu/public/server/node_modules/mysql/lib/protocol/sequences/Query.js:94:8)
    at Protocol._parsePacket (/home/ubuntu/public/server/node_modules/mysql/lib/protocol/Protocol.js:271:23)
    at Parser.write (/home/ubuntu/public/server/node_modules/mysql/lib/protocol/Parser.js:77:12)
    at Protocol.write (/home/ubuntu/public/server/node_modules/mysql/lib/protocol/Protocol.js:39:16)
    at Socket.<anonymous> (/home/ubuntu/public/server/node_modules/mysql/lib/Connection.js:82:28)
    at Socket.EventEmitter.emit (events.js:95:17)
    at Socket.<anonymous> (_stream_readable.js:746:14)

下面是我如何定义表的：

var dbconfig = {};
dbconfig.database = process.env.database || 'crew';
dbconfig.username = process.env.username || 'root';
dbconfig.password = process.env.password || '';
dbconfig.hostname = process.env.hostname || 'localhost';

var sequelize = new Sequelize(dbconfig.database, dbconfig.username, dbconfig.password, {
  host: dbconfig.hostname
});

var User = sequelize.define('users', {
  username: {
    type: Sequelize.STRING, 
    unique: true
  },
  password: Sequelize.STRING,
  salt: Sequelize.STRING,
  token: Sequelize.STRING,
  group_id: {
    type: Sequelize.INTEGER,
    references: 'groups',
    referencesKey: 'id'
  }
});

var Message = sequelize.define('message', {
  message: Sequelize.STRING,
  group_id: {
    type: Sequelize.INTEGER,
    references: 'groups',
    referencesKey: 'id'
  },
  user_id: {
    type: Sequelize.INTEGER,
    references: 'users',
    referencesKey: 'id'
  }
});

var Group = sequelize.define('groups', {
  groupname: Sequelize.STRING,
  groupkey: Sequelize.STRING
});


Group.sync({force: true});
User.sync({force: true});
Message.sync({force: true});

---

想出来了！！希望这能帮助其他人

因此，下面的命令基本上是异步操作，它们在不同的时间执行，导致sequelize失败，因为这些表依赖于其他表，执行顺序很重要

Group.sync({force: true});
User.sync({force: true});
Message.sync({force: true});

如果您在

sequelize

上调用

sync（）

，而不是执行上述操作，那么sequelize确切地知道命令需要以什么顺序执行

sequelize.sync();

---

在看到这个之前我真的很困惑。现在它突然变得完全有意义了。在我刚刚学习如何使用Sequelize时，我确实帮了我的忙。每个模型都有单独的文件，所以我应该在哪里调用

Sequelize.sync（）@Argon调用输入文件（app.js）中的sequelize.sync（）
sequelize.sync();