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How to find by id in MongoDB?
To find by id in MongoDB, use the find() method as in the below syntax −
db.findByIdDemo.find({"_id" :yourObjectId});To understand the above syntax, let us create a collection with documents −
> db.findByIdDemo.insertOne({"Value":10});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e07158925ddae1f53b621fc")
}
> db.findByIdDemo.insertOne({"Value":500});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e07158c25ddae1f53b621fd")
}
> db.findByIdDemo.insertOne({"Value":1000});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e07159125ddae1f53b621fe")
}Following is the query to display all documents from a collection with the help of find() method −
> db.findByIdDemo.find();
This will produce the following output −
"_id" : ObjectId("5e07158925ddae1f53b621fc"), "Value" : 10 }
{ "_id" : ObjectId("5e07158c25ddae1f53b621fd"), "Value" : 500 }
{ "_id" : ObjectId("5e07159125ddae1f53b621fe"), "Value" : 1000 }Following is the query to find by id in MongoDB −/p>
> db.findByIdDemo.find({"_id" :ObjectId("5e07158c25ddae1f53b621fd")});This will produce the following output −
{ "_id" : ObjectId("5e07158c25ddae1f53b621fd"), "Value" : 500 }
Updated on: 31-Mar-2020
10K+ Views
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