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Set MongoDB $slice with a range?
To set slice along with a range, use the $slice operator with parameters. These parameters are to be set for beginning position of the elements to be fetched and the 2nd parameter is for range. Let us create a collection with documents −
> db.demo54.insertOne({"ListOfValues":[100,2030,5353,7364,635,535,524,423,2434,1323,799874,90]}); { "acknowledged" : true, "insertedId" : ObjectId("5e27151ecfb11e5c34d89914") }
Display all documents from a collection with the help of find() method −
> db.demo54.find().pretty();
This will produce the following output −
{ "_id" : ObjectId("5e27151ecfb11e5c34d89914"), "ListOfValues" : [ 100, 2030, 5353, 7364, 635, 535, 524, 423, 2434, 1323, 799874, 90 ] }
Following is the query to set slice with a range −
> db.demo54.find({}, { "ListOfValues": { $slice: [5,3]}}).pretty();
This will produce the following output −
{ "_id" : ObjectId("5e27151ecfb11e5c34d89914"), "ListOfValues" : [ 535, 524, 423 ] }
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