我如何从 table 中查询一条记录，并在 sequelize 中从其他两个 table 中获取数据？

Question

我正在使用 Sequelize，这是我的设置

// Event model
const Event = sequelize.define('event', {
  id: {
    type: DataTypes.INTEGER,
    primaryKey: true,
    autoIncrement: true,
    allowNull: false,
  },
  name: {
    type: DataTypes.STRING,
    allowNull: false,
  },
}

/// Company model
const Company = sequelize.define('company', {
  id: {
    type: DataTypes.INTEGER,
    primaryKey: true,
    autoIncrement: true,
    allowNull: false,
  },
  name: {
    type: DataTypes.STRING,
    allowNull: false,
  },
  description: {
    type: DataTypes.STRING,
    allowNull: false,
  },
});

//CompanyEvent model
const CompanyEvent = sequelize.define('company_event', {
  companyId: {
    type: DataTypes.INTEGER,
    primaryKey: true,
    allowNull: false,
  },
  eventId: {
    type: DataTypes.INTEGER,
    primaryKey: true,
    allowNull: false,
  },
}, {
  tableName: 'company_events'
});

然后是协会声明

Company.belongsToMany(Event, {
  through: 'company_events'
});
Event.belongsToMany(Company, {
  through: 'company_events'
});

我想要得到的是一个查询，它可以 return 这个或类似的东西，我可以从 company 和 event table.

{
  companyId: 1,
  eventId: 1,
  company: {
    id: 1,
    name: 'Some corp',
    description: 'Some description',
  },
  event: {
    id: 1,
    name: 'Some event',
  }
}

我怎样才能达到上述目标？谢谢。

Answer 1

CompanyEvent.belongsTo(Company, {
  foreignKey: 'companyId',
  as: 'company'
});
CompanyEvent.belongsTo(Event, {
  foreignKey: 'eventId',
  as: 'event'
});


...


CompanyEvent.findAll({
    include: ['company', 'event']
})

我如何从 table 中查询一条记录，并在 sequelize 中从其他两个 table 中获取数据？

How do i query a record from a through table and also get the data from the other two tables in sequelize?

sql

postgresql

many-to-many

node.js

sequelize.js