Introducing MongoDB Chapter 3findOneAndRemove
findOneAndRemove() behaves the same way as remove() does and takes the same
amount of parameters:
User.findOneAndRemove({
_id: 1
}, function(err){
if (err)
res.send(err)
res.send({
success: true
})
})We just have to define the criteria for which documents we want to delete.
Now, we can also modify the preceding code:
User.findOneAndRemove({
_id: 1
}, function(err, user){
if (err)
res.send(err)
res.send({
success: true,
user: user
})
})Here, I have highlighted the added piece of code. We can also pass on a second parameter
to the callback function which returns the user object being deleted. Now, this is helpful if
we want to display a certain message to the frontend and also add some user attributes
such as name or email of the user. For example, if we want to display a message saying
User with name {x} has been deleted. on the frontend, then we can pass user or other
attributes of user here; in this case, it's the name, to be displayed on the frontend.
The main difference between remove() and findOneAndRemove() is that remove does
not return the documents that were deleted but findOneAndRemove() does. Now we
know when to use these two methods.