How to get Request.User in Django-Rest-Framework s

问题:

I've tried something like this, it does not work.

class PostSerializer(serializers.ModelSerializer):

    class Meta:
        model = Post

    def save(self):
        user = self.context['request.user']
        title = self.validated_data['title']
        article = self.validated_data['article']

I need a way of being able to access request.user from my Serializer class.

回答1:

You cannot access the request.user directly. You need to access the request object, and then fetch the user attribute.

Like this:

user =  self.context['request'].user

Or to be more safe,

user = None
request = self.context.get("request")
if request and hasattr(request, "user"):
    user = request.user

More on extra context can be read here

回答2:

Actually, you don't have to bother with context. There is a much better way to do it:

from rest_framework.fields import CurrentUserDefault

class PostSerializer(serializers.ModelSerializer):

    class Meta:
        model = Post

   def save(self):
        user = CurrentUserDefault()  # <= magic!
        title = self.validated_data['title']
        article = self.validated_data['article']

回答3:

As Igor mentioned in other answer, use can use CurrentUserDefault. If you do not want to override save method just for this, then use doc:

from rest_framework import serializers

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