orm - 使用 Sequelize 连接 3 个表

Question

我正在尝试将以下原始查询转换为 ORM，但无法实现任何目标。

原始查询

select * from "Invoices" I 
LEFT JOIN "Requests" R ON R."id" = I."requestId" 
LEFT JOIN "Supps" S ON S."requestId" = R."id" 
where S."confirm" = 'OK'

我试过的:

  Requests.belongsTo(Invoices, { foreignKey: "id" });
  Supps.belongsTo(Requests, { foreignKey: "requestId" });
  Supps.hasMany(Requests, { foreignKey: "requestId" });
  Invoices.hasMany(Requests, { foreignKey: "requestId" });

  Invoices.findOne({
    include: [{ model: Requests, required: false }, { model: Supps, required: false }],
    where: { Sequelize.col("Supps.confirm"): { "OK" } }
  }).then(data => {
    console.log(data);
  })

但这会生成一个非常长的查询，其中包含多个子查询和错误数据

Answer 1

当然，您还需要在 th 关联中添加 sourceKey。 ( doc )

Supps.hasMany(Requests, { foreignKey: "requestId" ,sourceKey: '{ID}' });
Invoices.hasMany(Requests, { foreignKey: "requestId",sourceKey: '{ID}'  });

您也可以添加 {raw:true} 以获得一级 json 响应。

 Invoices.findOne({
    include: [{ model: Requests, required: false }, { model: Supps, required: false }],
    where: { Sequelize.col("Supps.confirm"): { "OK" } },
    raw:true
  }).then(data => {
    console.log(data);
  });