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Removing an array element from a MongoDB collection
To remove an array element, simply use $pull along with update(). Let us create a collection with documents −
> db.demo146.insertOne({"ListOfEmployeeNames":["Chris","David","Bob","Mike"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e32f54ffdf09dd6d08539bd")
}Display all documents from a collection with the help of find() method −
> db.demo146.find();
This will produce the following output −
{ "_id" : ObjectId("5e32f54ffdf09dd6d08539bd"), "ListOfEmployeeNames" : [ "Chris", "David", "Bob", "Mike" ] }Following is the query to remove an array element from MongoDB −
> db.demo146.update({}, { "$pull": { "ListOfEmployeeNames": "Bob" } });
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })Display all documents from a collection with the help of find() method −
> db.demo146.find();
This will produce the following output −
{ "_id" : ObjectId("5e32f54ffdf09dd6d08539bd"), "ListOfEmployeeNames" : [ "Chris", "David", "Mike" ] }
Updated on: 31-Mar-2020
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