Firestore 从集合中获取最近 24 小时的文档 - 节点

Question

I want to get the documents which comes under last 24 hours, for each document I have set a field timestamp as:

admin.firestore().collection('users').set({..., timestamp: new Date().toJSON() })

Now, in my cloud function, I want to get the docs which comes under last 24 hours only, so for that I came up with the logic:

const end = new Date();
const start = new Date(end.getTime() - (24 * 60 * 60 * 1000)); // 24 hours ago

const users = await admin
                .firestore()
                .collection('users')
                .where('timestamp', '>', start)
                .where('timestamp', '<', end)
                .get();

But this returns nothing.

I also tried this question which was asked earlier: Firebase query data of last 24 hour return same result

const users = await admin
                .firestore()
                .collection('users')
                .startAt(start)
                .get();

But it resulted in the following error:

ERROR Error: Too many cursor values specified. The specified values must match the orderBy() constraints of the query.

So, can someone help me out here?

Thanks in advance!

(Do I have to change how I save timestamp in firestore? like instead of timestamp: new Date().toJSON() something else...?)

EDIT-1 :

Answer 1

Since the timestamp field in your database is stored as a string value, you also have to pass string values for conditions on that field:

admin
.firestore()
.collection('users')
.where('timestamp', '>', start.toJSON())
.where('timestamp', '<', end.toJSON())

Without that you're comparing strings and dates, and no value will every meet the condition in that case.