Django DRF PUT 请求 ImageField

Question

I am uploading images using the ImageField in Django. After saving the image in the database when I GET the data to display on the frontend, I get it in the format:

{"pk":5,"employee_image":"/media/emp_temp_mast/5.png","first_name":"TEST",}

After changing the data on the frontend, I send a PUT request for the respective entry in the form:

{"pk":5,"employee_image":"/media/emp_temp_mast/5.png","first_name":"DATA CHANGED",}

However I get the following error after making the request:

employee_image: ["The submitted data was not a file. Check the encoding type on the form."]

How should I call the PUT request from frontend.

Answer 1

The suggestion by @Ross Rogers worked but I feel that it can get a little tedious as we expect every client side application to be aware that they have to Nuke the ImageField on every UPDATE request they intend to make. The client side should be able to make this abstraction and should not need to worry about the handling of the ImageField.

To achieve that I made the following change to the view where the backend receives the ImageField.

class Emp_DetailView(APIView):

    def get_object(self, pk):
        try:
            return db_data
        except Emp_Mast.DoesNotExist:
            raise Http404

    def put(self, request, pk, format=None):
        db_data = self.get_object(pk)

        if(db_data["employee_image"] and db_data["employee_image"].startswith('http'))):
            img_name = dataDict["employee_image"].split("/")[-1]
            emp_img_temp = ContentFile(requests.get(dataDict["employee_image"]).content, name=img_name)
            dataDict["employee_image"] = emp_img_temp

        serializer = Emp_Mast_Serializer(db_data, data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

A GET request is sent on the image URL and then the result is saved in a file format which can be used to send a PUT request