如何在 SEQUELIZE (nodeJS) 中创建触发器?

2022-01-19 00:00:00 node.js mysql triggers sequelize.js

我正在尝试使用 sequelize 创建触发器.主要思想是在创建 USER 后创建 CONFIG 的实例.

I'm trying to create a trigger using sequelize.. the main idea is to create an instance of CONFIG after creating a USER.

// USER MODEL
module.exports = function(sequelize, DataTypes) {    
    var User = sequelize.define('User', {
        name        : DataTypes.STRING(255),
        email       : DataTypes.STRING(255),
        username    : DataTypes.STRING(45),
        password    : DataTypes.STRING(100),
    }, {
        classMethods : {
            associate : function(models) {
                User.hasOne(models.Config)
            }
        }
    });    
    return User;
};

// CONFIG MODEL
module.exports = function(sequelize, DataTypes) {
    var Config = sequelize.define('Config', {
        notifications   : DataTypes.INTEGER
    }, {
        classMethods : {
            associate : function(models) {
                Config.belongsTo(models.User)
            }
        }
    });

    return Config;
};

如你所见，一个用户"有一个配置"，一个配置"属于一个用户"，所以在创建用户后我想自动创建他的配置行.

As you can see, a "user" has one "config" and a "config" belongs to a "user", so after a user is created I want to create his config row automatically.

目标是做:

DELIMITER //
CREATE TRIGGER create_config AFTER INSERT ON user
  FOR EACH ROW
BEGIN
    insert into config    (user_id)     values(new.user_id);
END; //
DELIMITER ;

现在，我要做的模拟如下:

Now, what I do to simulate that is the following:

.then(function(user){
   return dao.Config.create(req.body, user, t);
})

创建用户后，我会像这样创建他的配置...它可以工作，但不是我要搜索的内容.

Once a User is created I create his configuration like that... it works but is not what I'm searching.

我该怎么做?

推荐答案

您可以通过以下两种方式之一来执行此操作.正如您所指出的，您可以在数据库本身中创建一个触发器.您可以运行原始的 sequelize 查询来完成此操作:

You can do this in one of two ways. As you noted, you could create a trigger in the database itself. You could run a raw sequelize query to accomplish this:

sequelize.query('CREATE TRIGGER create_config AFTER INSERT ON users' +
  ' FOR EACH ROW' +
  ' BEGIN' +
  ' insert into configs (UserId) values(new.id);' +
  'END;')

或者，您可以在执行的用户模型上创建 hookafterCreate 事件的操作:

Or, you could create a hook on the user model that performs an action on an afterCreate event:

module.exports = function(sequelize, DataTypes) {    
  var User = sequelize.define('User', {
    name        : DataTypes.STRING(255),
    email       : DataTypes.STRING(255),
    username    : DataTypes.STRING(45),
    password    : DataTypes.STRING(100),
  }, {
    classMethods : {
      associate : function(models) {
        User.hasOne(models.Config)
      }
    },
    hooks: {
      afterCreate: function(user, options) {
        models.Config.create({
          UserId: user.id
        })
      }
    }
  });
  return User;
};

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