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Fetch specific documents with array values in MongoD
To fetch specific documents, use limit() along with toArray(). The toArray() method returns an array that contains all the documents from a cursor. Let us create a collection with documents −
> db.demo482.insertOne({_id:1,"StudentInformation":[{"Name":"Chris","Age":21}]});
{ "acknowledged" : true, "insertedId" : 1 }
> db.demo482.insertOne({_id:2,"StudentInformation":[{"Name":"Bob","Age":23}]});
{ "acknowledged" : true, "insertedId" : 2 }
> db.demo482.insertOne({_id:3,"StudentInformation":[{"Name":"David","Age":20}]});
{ "acknowledged" : true, "insertedId" : 3 }
Display all documents from a collection with the help of find() method −
> db.demo482.find();
This will produce the following output −
{ "_id" : 1, "StudentInformation" : [ { "Name" : "Chris", "Age" : 21 } ] }
{ "_id" : 2, "StudentInformation" : [ { "Name" : "Bob", "Age" : 23 } ] }
{ "_id" : 3, "StudentInformation" : [ { "Name" : "David", "Age" : 20 } ] }
Following is the query to fetch specific documents with limit() −
> db.demo482.find({}).limit(2).toArray();
This will produce the following output −
[
{
"_id" : 1,
"StudentInformation" : [
{
"Name" : "Chris",
"Age" : 21
}
]
},
{
"_id" : 2,
"StudentInformation" : [
{
"Name" : "Bob",
"Age" : 23
}
]
}
]
Updated on: 2020-05-11T09:55:45+05:30
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