微信小程序端传递过来图片之后，创建了一个专门的方法使用uuid生成并返回图片名字，防止图片太多名字重复的问题。图片可以正常写入到文件中，但是把新的文件名和其他的数据传入进行反序列化的时候报了如下错误：{“images”:[“提交的数据不是一个文件。请检查表单的编码类型。”]}，新的图片名是str类型的，不知道错在哪

• views.py

# 提取出公共的方法evaluation_directory_path获取图片后缀
# 使用uuid创建唯一的图片名，并保存的路径和文件名一并返回
def evaluation_directory_path(product_id, filename):
    ext = filename.split(".")[-1]
    filename = '{}.{}'.format(uuid.uuid4().hex[:10], ext)
    return os.path.join("evaluations", filename)

class ProductEvaluationImageView(GenericAPIView):
    queryset = ProductEvaluationImage.objects.all()
    serializer_class = ProdcutEvaluationImageSerializers

    def post(self, request):
        data = request.data
        files = request.FILES.getlist('upload')
        product_id = request.data['product_id']
        user_id = request.data['user_id']
        for file in files:
            filename = evaluation_directory_path(product_id, file.name)
            with open(os.path.join(settings.MEDIA_ROOT, filename), "wb") as f:
                for chunk in file.chunks():
                    f.write(chunk)
            f.close()
            serializer = self.get_serializer(
                data={"images": filename, "product_id": product_id, "user_id": user_id})
            serializer.is_valid(raise_exception=True)
            serializer.save()
            return Response("获取成功", status=200)

• models.py

class ProductEvaluationImage(models.Model):
    evaluation = models.ForeignKey(
        ProductEvaluation, related_name="evaluation_images", default="", on_delete=models.CASCADE, verbose_name="关联评论")
    images = models.ImageField(
        null=True, blank=True, upload_to=evaluation_directory_path, verbose_name="商品评价图片")

    class Meta:
        verbose_name = "商品评价关联图"
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.evaluation.detail_content