CODEWITHSUNDEEP
pythonpython-3.xdjangodjango-rest-framework
Nimish Bansal
Nimish Bansal

Reputation: 1759

JavaScript Null does not convert to None

@parser_classes([MultiPartParser, FormParser])
@api_view(['POST', ])
def product_list(request):
    print(request.POST.get('key'))
    print(request.data.get('key'))
    print(request.FILES)

When I am sending form data with value of key=null it displays null as string but didn't convert to None what should I do. The work around that I have to do is something like

if request.data.get('key', None) in ['null', None]:
    #then do something

But this doesn't seem to be a clean way of doing this. So what should I do?

I expected that django or django rest framework will automatically convert null to None.

Upvotes: 1

Views: 1669

Answers (2)

Nimish Bansal
Nimish Bansal

Reputation: 1759

I made a small workaround to solve this issue by designing a middleware. I dont know if its good but it worked for me. I made it first mutable, changed it then made immutable again.

Note : if data sent is nested json you have to alter it to handle json recursively.

from django import http
from django.utils.deprecation import MiddlewareMixin


class NullStringToNoneMiddleware(MiddlewareMixin):
    """Responsible for converting all string null values to None"""
    def process_request(self, request):
        request.POST._mutable = True
        for j in request.POST:
            if request.POST[j] == 'null':
                request.POST[j] = None
        request.POST._mutable = False

Upvotes: 0

Masklinn
Masklinn

Reputation: 42492

There is no such thing as null/none in HTTP form-data content (in fact there's no such thing as types in the way we'd usually understand, though there can be a content-type associated with each item).

So what happens here is on the javascript side the null gets converted to a string, added to the data, sent to the server, which just gets a null string without any more information.

Generally, "null" items would be missing entirely, alternatively, they would have an empty value associated with them.

Either way, this is not an issue with django.

Upvotes: 3

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