How to set current user to user field in Django Rest Framework?

Question

I have the following code working perfectly. I can create a Post object from DRF panel by selecting an image and a user. However I want DRF to populate the user

Answer 1

As of DRF version 3.8.0 (Pull Request discussion), you can override save() in serializer.

from rest_framework import serializers
...

class PostSerializer(serializers.ModelSerializer):
    user = serializers.PrimaryKeyRelatedField(read_only=True, default=serializers.CurrentUserDefault())

    class Meta:
        model = Post
        fields = ['id', 'user', 'photo']

    def save(self, **kwargs):
        """Include default for read_only `user` field"""
        kwargs["user"] = self.fields["user"].get_default()
        return super().save(**kwargs)