Django not sending correct json response

Question

I have set up a simple project and when a post request is made, it is expected to return a response depending on what value the user entered.

I am testing my api logic in postman.

At the moment, no matter what value I enter, the same json response is sent back. This is not the expected logic.

views.py:

def function(request):
    if request.method == 'POST':
        if request.POST.get("number") == 1:
            print("Number is 1")
            return JsonResponse({'message':'Number is 1'})
        else:
            print("Number is not 1")
            return JsonResponse({'message':'Number is not 1'})

Even if the value of number is equal to 1, the message: Number is not 1, is returned.

Postman request:

{
    "number": 1
}

Thank You.

Hey @RossRodgers, I have tried to enter my data as a number and as a string as well, check my post, I have updated it. Thank You. — nazam007
– nazam007, Commented Oct 6, 2019 at 0:26
can you add a print(request.POST) at the beginning of your function and show us the result? — Lord Elrond
– Lord Elrond, Commented Oct 6, 2019 at 0:28
@ToanQuocHo classic case of needing to use request.body. request.POST is only used for your own views, and not for webhooks/postman. — Lord Elrond
– Lord Elrond, Commented Oct 6, 2019 at 0:52

Lord Elrond · Accepted Answer · 2019-10-06 00:43:47Z

1

From the docs:

If you need to access raw or non-form data posted in the request, access this through the HttpRequest.body attribute instead.

Since you are sending data that is "non-form" data, you need to use request.body instead:

import json

def function(request):
    if request.method == 'POST':
        data = json.loads(request.body)
        if data.get("number", 0) == 1:
            print("Number is 1")
            return JsonResponse({'message':'Number is 1'})
        else:
            print("Number is not 1")
            return JsonResponse({'message':'Number is not 1'})

edited Oct 6, 2019 at 0:43

answered Oct 6, 2019 at 0:24

Lord Elrond

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3 Comments

nazam007 Over a year ago

Hey @CalebGoodman, I have tried to enter my data as a number and as a string as well, check my post, I have updated it. Thank You.

nazam007 Over a year ago

Hey @CalebGoodman Thank you bro this has solved the problem. One question, in the line: data.get("number", 0) Why is the second argument used, and what is it's purpose?

Lord Elrond Over a year ago

@nazam007 it is a default argument in case data doesn't have the number keyword. if you try to run data.get('key') when key doesn't exist, you will get an error unless .get has a default.

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