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MongoDB query to insert an array element with a condition?
Let us first create a collection with documents −
>db.demo11.insertOne({"ListOfStudent":[{"StudentName":"Chris","ListOfScore":[76,67,54,89]}]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e0f6e34d7df943a7cec4fa1")
}Following is the query to display all documents from a collection with the help of find() method −
> db.demo11.find().pretty();
This will produce the following output −
{
"_id" : ObjectId("5e0f6e34d7df943a7cec4fa1"),
"ListOfStudent" : [
{
"StudentName" : "Chris",
"ListOfScore" : [
76,
67,
54,
89
]
}
]
}Here is the query to insert an array element with a condition −
> db.demo11.update( {"ListOfStudent.StudentName":"Chris"}, {$push:{"ListOfStudent.$.ListOfScore":98}} );
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })Let us check the documents once again −
> db.demo11.find().pretty();
This will produce the following output −
{
"_id" : ObjectId("5e0f6e34d7df943a7cec4fa1"),
"ListOfStudent" : [
{
"StudentName" : "Chris",
"ListOfScore" : [
76,
67,
54,
89,
98
]
}
]
}
Updated on: 01-Apr-2020
513 Views
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