CODEWITHSUNDEEP
pythondjangopaginationdjango-rest-framework
chronox
chronox

Reputation: 117

Django Rest Framework Pagination - Return last page by default

I am working on a chats app using django rest framework to return a list of messages.

These are my codes in api.py

class MessageList(generics.ListAPIView):
    queryset = Message.objects.all()
    serializer_class = MessageSerializer
    pagination_class = MessagePagination

    def get_queryset(self):
        queryset = super(MessageList, self).get_queryset()
        return queryset.filter(room__id=self.kwargs.get('pk')).order_by('id')

Using http://localhost:8000/chats/message-list/[room_pk]/?page=?, I was able to get the list of messages I wanted in different pages.

However, I would like the last page to be returned by default since I will also be implementing js infinite scrolling later on. In other words, by entering the url http://localhost:8000/chats/message-list/[room_pk]/, the last page objects will be return instead.

I am pretty new in django rest framework so I really appreciate any help given. Thanks in advance.

Upvotes: 2

Views: 1342

Answers (2)

zaidfazil
zaidfazil

Reputation: 9235

If you only need to view the latest objects, then you may consider overriding the ordering attribute of the model.

class Message(models.Model):
    ....
    ....

    class Meta:
        ordering = ('-id', )

By setting the Meta attribute ordering, you are explicitly setting all querysets of this model to return the latest created objects. This way you don't have to write unnecessary code for the same functionality.

PS: Don't forget makemigrations and migrate.

Upvotes: 1

Muhammad Fahad Manzoor
Muhammad Fahad Manzoor

Reputation: 405

You can get the desired data/result by using following.

return queryset.filter(room__id=self.kwargs.get('pk')).order_by('-i‌​d')

Be at known that - with any field can change the sorting order, be it alphabetical (string) or numerical (int). Happy Python-ing to you!

Upvotes: 0

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