如何进行此 Firestore 查询？

Question

我是Firestore新手，需要查询。我有这个数据库结构：

{
  "businesses": {
    "1" : {
      "name": "bla",
      "employees": {
        "1" : {
          "name": "Juan",
          "schedules": {
            "1": {
              "scheduleId" : "72",
              "from": "21/08/2020"
            }
          }
        },
        "schedules": {
          "72": {
            //some properties
          }
        }
      }
    }
  }
}

给定 businessId 和 scheduleId，我需要获取分配了 scheduleId 的所有企业员工。

我试过这个：

export async function getEmployeesWithSchedule(businessId: string, scheduleId: string): Promise<Employee[]> {
    const docs = (await admin.firestore().collection(`businesses/${businessId}/employees`)
         .where("schedules.scheduleId", "==", scheduleId)
         .get()).docs;
   //extract results
}

但我没有得到任何结果。我该如何查询？

Answer 1

试试下面的 where 子句。您应该只取回文档，其中 schedules 映射包含键值对 scheduleId 和 non-null 值：

const docs = (await admin.firestore().collection(`businesses/${businessId}/employees`)
         .where(`schedules.${scheduleId}`, "!=", null)
         .get()).docs;