[英]Firebase Firestore Query Between Two Timestamps
I want to find events that are a on now and upcoming (next 30 days) but that are also not in the past.我想找到现在和即将发生的事件(未来 30 天),但也不是过去的事件。
When i run this as a cloud function, I get "Cannot have inequality filters on multiple properties".当我将它作为云函数运行时,我得到“多个属性上不能有不等式过滤器”。 How am I meant to get this type of data.我怎么想得到这种类型的数据。
(ignore the fact that the date stuff is a bit messy, am still playing around). (忽略日期内容有点乱的事实,我还在玩)。
// Create date 30 days in future
const searchData: Date = new Date();
searchData.setDate(searchData.getDate() + 30);
// Load data and handle empty respoonse
const response: admin.firestore.QuerySnapshot = await admin
.firestore()
.collection(Collections.EVENTS)
.where("startDate", "<=", admin.firestore.Timestamp.fromMillis(searchData.valueOf()))
.where("endDate", ">=", admin.firestore.Timestamp.fromMillis(new Date().valueOf()))
.where("public", "==", true)
.limit(NUMBER_OF_EVENTS)
.get();
Edit: I would like to know the data structure/query method that will allow me to return all events in the events collection that are on now or that will start in the next month.编辑:我想知道数据结构/查询方法,它允许我返回事件集合中现在或下个月开始的所有事件。 Additionally, I would like the query to exclude events that have already finished.此外,我希望查询排除已经完成的事件。 Each document (event) has a startDate and endDate timestamp on it.每个文档(事件)上都有一个 startDate 和 endDate 时间戳。
Since you have two fields to check with ranges, I'm not sure this is doable with a single query.由于您有两个字段要检查范围,因此我不确定这对单个查询是否可行。 What you can do instead is perform two queries, merge the results on the client, and perform a final filter to get the exact matches.您可以做的是执行两个查询,在客户端合并结果,并执行最终过滤器以获得精确匹配。
I can't think of a way to structure your data that will do this with a single query.我想不出一种结构化数据的方法,可以通过单个查询来完成此操作。
From the docs:从文档:
You can only perform range comparisons (<, <=, >, >=) on a single field, and you can include at most one array-contains or array-contains-any clause in a compound query:您只能对单个字段执行范围比较(<、<=、>、>=),并且您最多可以在复合查询中包含一个 array-contains 或 array-contains-any 子句:
citiesRef.where("state", ">=", "CA").where("state", "<=", "IN");
citiesRef.where("state", "==", "CA").where("population", ">", 1000000);
https://firebase.google.com/docs/firestore/query-data/queries https://firebase.google.com/docs/firestore/query-data/queries
I know this is kind a old thread, but the answer might be good for others.我知道这是一个旧线程,但答案可能对其他人有好处。
What you can do as I at the end ended up doing, is that you have a $start_date and a $target_date.正如我最后所做的那样,你可以做的是你有一个 $start_date 和一个 $target_date。
You then do like this:然后你这样做:
<?php
$start = strtotime('2021-11-22');
$target = strtotime('2022-01-01 0:00:00');
$limit = (($target - $start) / 86400);
$query = $col_data->where('date.day_start', '>=', $start);
$query = $query->limit($limit);
?>
Not bad, eh?还不错吧? You welcome!没关系!
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