对特定类型的数据进行分组，并使用存档按升序或降序排序。

Question

我想根据“标题”和"alertID“在JSON下面分组，然后按升序或降序排序。

    let events = [{
    "_id": "5cbdb030284dfeb0bb441bfe",
    "alert": {
        "title": "New Pt w/ discharge in last 30 days",
        "alertTime": "2018-12-15T05:48:31.000Z",
        "alertID": "99994444"
    }
}, {
    "_id": "5cbdafbc284dfeb0bb441bd7",
    "alert": {
        "title": "Insurance: Non-Contracted Plan",
        "alertTime": "2018-09-01T03:13:00.000Z",
        "alertID": "12345699"
    }
}, {
    "_id": "5cbdafbe284dfeb0bb441be6",
    "alert": {
        "title": "Insurance: Non-Contracted Plan",
        "alertTime": "2018-09-01T03:13:00.000Z",
        "alertID": "12345688"
    }
}, {
    "_id": "5cbdb08d284dfeb0bb441c13",
    "alert": {
        "title": "New Pt w/ ED visit in last 7 days",
        "alertTime": "2018-12-15T05:48:31.000Z",
        "alertID": "12345699"
    }
}, {
    "_id": "5cbdb068284dfeb0bb441c09",
    "alert": {
        "title": "New Pt w/ ED visit in last 7 days",
        "alertTime": "2018-12-15T05:48:31.000Z",
        "alertID": "12345688"
    }
}, {
    "_id": "5cbdb477284dfeb0bb441c73",
    "alert": {
        "title": "PT Consult Order",
        "alertTime": "2018-07-17T05:42:15.000Z",
        "alertID": "12345699"
    }
}, {
    "_id": "5cbdafb8284dfeb0bb441bc7",
    "alert": {
        "title": "Bed Request Order for Medicare Patient",
        "alertTime": "2019-04-22T12:12:39.340Z",
        "alertID": "99994444"
    }
}]

这就是我如何实现(降序)，但它没有得到排序。

_(events)
            .orderBy(events, (e) => { return e.alert.alertTime},['desc'])
            .uniqBy(function(event) { return [event.alert.title, event.alert.alertID].join();})
            .groupBy((event) => event.alert.alertID)

我特别想利用房客来达到这一要求。有人能指出我错过了什么吗？

--这是我所期望的输出。因此，如果"alertID: 99994444“首先出现，那么我想对所有具有相同'alertID‘的数据进行分组，并按升序或降序排序，如下所示。同样，对于所有剩余的“警报be”，都应该这样做。：

[{
    "_id": "5cbdb477284dfeb0bb441c73",
    "alert": {
        "title": "PT Consult Order",
        "alertTime": "2018-07-17T05:42:15.000Z",
        "alertID": "12345699"
    }
}, {
    "_id": "5cbdafbc284dfeb0bb441bd7",
    "alert": {
        "title": "Insurance: Non-Contracted Plan",
        "alertTime": "2018-09-01T03:13:00.000Z",
        "alertID": "12345699"
    }
}, {
    "_id": "5cbdb08d284dfeb0bb441c13",
    "alert": {
        "title": "New Pt w/ ED visit in last 7 days",
        "alertTime": "2018-12-15T05:48:31.000Z",
        "alertID": "12345699"
    }
}, {
    "_id": "5cbdafbe284dfeb0bb441be6",
    "alert": {
        "title": "Insurance: Non-Contracted Plan",
        "alertTime": "2018-09-01T03:13:00.000Z",
        "alertID": "12345688"
    }
}, {
    "_id": "5cbdb068284dfeb0bb441c09",
    "alert": {
        "title": "New Pt w/ ED visit in last 7 days",
        "alertTime": "2018-12-15T05:48:31.000Z",
        "alertID": "12345688"
    }
}, {
    "_id": "5cbdb030284dfeb0bb441bfe",
    "alert": {
        "title": "New Pt w/ discharge in last 30 days",
        "alertTime": "2018-12-15T05:48:31.000Z",
        "alertID": "99994444"
    }
}, {
    "_id": "5cbdafb8284dfeb0bb441bc7",
    "alert": {
        "title": "Bed Request Order for Medicare Patient",
        "alertTime": "2019-04-22T12:12:39.340Z",
        "alertID": "99994444"
    }
}]

Answer 1

问题是，在使用_(events)链接时，应该省略链式方法调用中的第一个“集合”参数。因此，改变：

_(events)
        .orderBy(events, (e) => { return e.alert.alertTime},['desc'])

至：

_(events)
        .orderBy((e) => { return e.alert.alertTime},['desc'])