Mongoengine get latest()

Question

In django how to get latest instance of a query set if i'm using MongoEngine

Normally we do

Users.objects.latest('id')

But i cant use latest in MongoEngine.

;) . i'm in stuck .

I didn't find a solution here . but i've implemented . whats your opinion about below

Users.objects.all().order_by('-id').limit(1)[0] 

This will return the latest instance .

and also fixed the issue by committing it to mongoenngine.

https://github.com/anishmenon/mongoengine/

You may install this and use

 Users.objects.latest('id')

Answer 1

You could do:

Users.objects.order_by('-id').first()

Answer 2

Ross's answer is great enough.

But if you really need a latest(), implementing a custom QuerySet can do this.

"Decorator" way:

class Users(Document):
    username = StringField()

    @queryset_manager
    def latest(doc_cls, queryset):
        return queryset.order_by('-id').first()

"meta" way:

class UsersQuerySet(QuerySet):

    def latest(self):
        return self.order_by('-id').first()

class Users(Document):
    meta = {'queryset_class': UsersQuerySet}

Now you can:

Users.objects.latest()
# or
Users.latest()