在Django-Rest-Framework中创建第二个视频时出现Bad Request错误求助

我正在用Django和React开发一个YouTube克隆项目。当用户创建第二个视频时，系统返回Bad Request错误，请求数据如下：

return (<QueryDict: {'title': ['Edit Test56'], 'description': ['is It working1643'], 'user': ['3'], 'image': [<TemporaryUploadedFile: slackphot.png (image/png)>], 'video': [<TemporaryUploadedFile: video-for-fatube.mp4 (video/mp4)>]}>
)

错误路径为/api/admin/create/，使用Postman发送POST请求时也出现相同错误。

相关代码 #

views.py API视图

class CreateVideo(APIView):
    #permissions_classes = [IsAuthenticated]
    parser_classes = [MultiPartParser, FormParser]

    def post(self, request, format=None):
        print(request.data)
        serializer = VideoSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_200_OK)
        else:
            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

serializer.py 视频序列化器

class VideoSerializer(serializers.ModelSerializer):
    user_name = CharField(source="user.user_name", read_only=True)

    class Meta:
        model = Video
        fields = ["id", "title", "image", "video", "description", "date_added", "is_active", "user", "user_name", "likes"]

models.py 视频模型

class Video(models.Model):
    title = models.CharField(max_length=50)
    image = models.ImageField(_("Image"), upload_to=upload_to, default="videos/default.jpg")
    video = models.FileField(_("Video"), upload_to=upload_to, default="videos/default.mp4")
    user = models.OneToOneField(
        settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="user_channel"
    )
    description = models.CharField(max_length=255)
    likes = models.ManyToManyField(settings.AUTH_USER_MODEL, related_name='video_post', null=True, blank=True)
    date_added = models.DateTimeField(default=timezone.now)
    is_active = models.BooleanField(default=True)

问题原因 #

核心问题出在Video模型的user字段：你使用了OneToOneField，这意味着一个用户只能关联一个视频。当用户创建第二个视频时，数据库会触发唯一性约束校验，导致序列化器验证失败，返回400 Bad Request错误。

解决方案 #

将models.py中的user字段从OneToOneField改为ForeignKey（一对多关系，符合一个用户可上传多个视频的业务逻辑）：

user = models.ForeignKey(
    settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="user_channel"
)

修改完成后，执行数据库迁移命令更新表结构：

python manage.py makemigrations
python manage.py migrate

内容的提问来源于stack exchange，提问作者PHILLIPP APETENOK