如何从MongoDB检索分页数据？

Question

I am building a C# ASP.net core web application which connects to MongoDB. My aim is to get data from MongoDB in form of pages, for example if I have 100 documents of a certain collection I would like to get 10 documents after ID=X and 10 documents before ID=X.

What is the right syntax to get data like that knowing ID of a document (Previous 10 documents as well as Next 10 documents)?

Answer 1

You have to execute 2 queries:

1) for the next 10 objects

db.collection.find({_id:{$gt:object_id}}).limit(10)

2) for the previous 10 objects

db.collection.find({_id:{$lte:object_id}}).sort({_id:-1}).limit(10)

When you sort with _id, you will get the documents sorted (descending or ascending) by their creation timestamps.