Sequelize不能创build表，但是当我在MySQL CLI中运行相同的工作
我正在使用sequelize并遇到一个奇怪的错误：
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) 奇怪的是，当我尝试在MySQL CLI中执行这些命令时，它完美地工作：
mysql> show tables; Empty set (0.00 sec) mysql> 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; 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; 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; Query OK, 0 rows affected (0.00 sec) Query OK, 0 rows affected (0.00 sec) Query OK, 0 rows affected (0.01 sec)
以下是我如何定义表格：
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});
弄清楚了！！ 希望这会帮助别人。
所以基本上下面的命令是asynchronous操作，它们在不同的时间执行，导致序列化失败，因为表依赖于其他表，执行顺序很重要。
Group.sync({force: true}); User.sync({force: true}); Message.sync({force: true});
相反，如果您在sequelize上调用sync() ，sequelize会准确知道该命令需要执行的顺序。
sequelize.sync();