Introducing MongoDB Chapter 3updateOne()
This command updates only a single document in the collection. Here, we have inserted a
couple of user entries with the incorrect emails. For the user with the name Peter, the
email is [email protected]. Let's update this document using updateOne():
> db.users.updateOne(
{ "name": "Peter" },
{
$set: { "email": "[email protected]" }
}
)This command will update Peter's email to [email protected]. The output is:
As the output says, the modifiedCount is 1 and the matchedCount is 1 , which means the
document with the given condition was found and updated.
updateMany()
This command is used to update multiple documents in a collection. The command for
updating documents with updateOne() and updateMany() is the same. To update the
multiple records, we specify the condition and then set the desired values:
> db.users.updateOne(
{ "name": "Peter" },
{
$set: { "email": "[email protected]" }
}
)