如何在 Model 序列化程序中向當前用戶聲明作者？

Question

我有郵政 model：

class Post(models.Model):
    title = models.CharField(max_length=50)
    text = models.CharField(max_length=1000)
    published_date = models.DateTimeField(auto_now_add=True)
    author = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE
    )
    category = models.ForeignKey(Category, on_delete=models.CASCADE)

還有一個觀點：

@api_view(['GET', 'POST'])
def posts(request):
    if request.method == 'GET':
        post_list = Post.objects.all()
        serializer = PostSerializer(post_list, many=True)
        return Response(serializer.data)
    elif request.method == 'POST':
        serializer = PostSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        
        return Response(serializer.errors)

和序列化器：

class PostSerializer(serializers.ModelSerializer):
    id = serializers.IntegerField(read_only=True)
    author = UserSerializer(read_only=True)
    category = CategorySerializer(read_only=True)
    author_id = serializers.IntegerField(write_only=True)
    category_id = serializers.IntegerField(write_only=True)

    class Meta:
        model = Post
        fields = ('id', 'title', 'text', 'published_date', 'author', 'category', 'category_id', 'author_id')

我想發送像 {"title":"some title", "text":"some text", "category_id"=1} 這樣的 POST 請求，這樣 author_id 將自動成為當前用戶 ID。 我怎樣才能做到這一點？

Answer 1

在視圖中，在 POST 期間將當前用戶傳遞給 serializer.save()。

def posts(request):
    if request.method == 'GET':
        post_list = Post.objects.all()
        serializer = PostSerializer(post_list, many=True)
        return Response(serializer.data)
    elif request.method == 'POST':
        serializer = PostSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save(author=request.user)
                              ^^^
            return Response(serializer.data)
        
        return Response(serializer.errors)