How to pull value from array of ObjectIDs in MongoDB?

To pull value from array of ObjectIDs in MongoDB, use the $pull operator with the $in operator to match and remove specific ObjectID values from the array.

Syntax

db.collection.update(
    { /* query */ },
    { $pull: { arrayField: { $in: [ObjectId("id1"), ObjectId("id2")] } } }
);

Sample Data

Let us create a collection with documents ?

db.demo258.insertOne({
    "arrayOfObjectsId": [
        ObjectId("5e47a5e81627c0c63e7dba92"),
        ObjectId("5e47a5e51627c0c63e7dba91")
    ]
});

{
    "acknowledged": true,
    "insertedId": ObjectId("5e47a8211627c0c63e7dba97")
}

Display all documents from a collection with the help of find() method ?

db.demo258.find();

{
    "_id": ObjectId("5e47a8211627c0c63e7dba97"),
    "arrayOfObjectsId": [
        ObjectId("5e47a5e81627c0c63e7dba92"),
        ObjectId("5e47a5e51627c0c63e7dba91")
    ]
}

Example: Pull Specific ObjectID

Following is the query to pull value from array of ObjectIDs ?

db.demo258.update(
    { },
    { $pull: { arrayOfObjectsId: { $in: [ObjectId("5e47a5e81627c0c63e7dba92")] } } }
);

WriteResult({ "nMatched": 1, "nUpserted": 0, "nModified": 1 })

Verify Result

Display all documents from a collection with the help of find() method ?

db.demo258.find();

{
    "_id": ObjectId("5e47a8211627c0c63e7dba97"),
    "arrayOfObjectsId": [ObjectId("5e47a5e51627c0c63e7dba91")]
}

Conclusion

Use $pull with $in to remove specific ObjectID values from arrays. The $in operator allows matching multiple ObjectIDs in a single operation, making it efficient for removing multiple values.