Sequelize js 无法与 Have 和 Group by 一起按预期工作答案

【问题标题】：Sequelize js not working as expected with Having and Group bySequelize js 无法与 Have 和 Group by 一起按预期工作
【发布时间】：2021-09-06 01:32:36
【问题描述】：

我的 ORM 查询有问题吗？我正在尝试使用 sequelize group 和 having 来过滤超过 30 条记录的预订日期：

SELECT "reservations"."reservationDate" FROM reservations, orders
WHERE "reservations"."orderId" = "orders"."orderId"
AND Orders.confirmed = true
GROUP BY "reservationDate"
HAVING COUNT("reservationDate") >= 30;

    db.Reservations.findAll({
      attributes: ['reservationDate'],
      where: {
        reservationDate: {
          [Sequelize.Op.between]: [fistMonthDay, lastMonthDay],
        },
      },
      include: [{
        model: db.Orders,
        attributes: [],
        where: { confirmed: true }
      }],
      group: ['reservationDate'],
      having: {
        [Sequelize.fn("COUNT", Sequelize.col("reservationId"))]: {
          [Sequelize.Op.gte]: 30,
        }
      }

    })

【问题讨论】：

标签： node.js postgresql express orm sequelize.js

【解决方案1】：

简单的解决方法：

having: Sequelize.literal(`count("reservation"."reservationId") >= 30`)

【讨论】：