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Update a specific MongoDB document in array with $set and positional $ operator?
To update a specific document in array with $set and positional $ operator, use MongoDB updateOne(). The updateOne() updates a single document in a collection based on a query filter.
Let us create a collection with documents −
> db.demo462.insertOne(
... {
... "id":1,
... "DueDateDetails": [
... {
... "Name": "David",
... "Age":21,
... "CountryName":["US","UK"]
... },
... {
...
... "Name": "Chris",
... "Age":23,
... "CountryName":["UK"]
... }
... ]
... }
... );
{
"acknowledged" : true,
"insertedId" : ObjectId("5e7f6c59cb66ccba22cc9dce")
}Display all documents from a collection with the help of find() method −
> db.demo462.find();
This will produce the following output −
{ "_id" : ObjectId("5e7f6c59cb66ccba22cc9dce"), "id" : 1, "DueDateDetails" : [ { "Name" :
"David", "Age" : 21, "CountryName" : [ "US", "UK" ] }, { "Name" : "Chris", "Age" : 23,
"CountryName" : [ "UK" ] } ] }Following is the query to update document in array using $set and positional $ operator with updateOne() −
> db.demo462.updateOne(
... {id: 1, "DueDateDetails.Name": "Chris"},
... { $set: { "DueDateDetails.$.CountryName": "AUS"} }
... )
{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }Display all documents from a collection with the help of find() method −
> db.demo462.find().pretty();
This will produce the following output −
{
"_id" : ObjectId("5e7f6c59cb66ccba22cc9dce"),
"id" : 1,
"DueDateDetails" : [
{
"Name" : "David",
"Age" : 21,
"CountryName" : [
"US",
"UK"
]
},
{
"Name" : "Chris",
"Age" : 23,
"CountryName" : "AUS"
}
]
}
Updated on: 11-May-2020
169 Views
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