Serializer.is_valid（）始终为False

Question

I have the following Serializer to handle a user:

class FriendSerializer(serializers.Serializer):

    login = serializers.CharField(max_length=15, required=True)
    password = serializers.CharField(max_length=15, required=True)
    mail = serializers.CharField(max_length=50, required=True)

Currently, my view which processes the POST request to register a new user is, based on the Django REST tutorial:

 @api_view(['POST'])
    def register_new_user(request):

        if request.method == 'POST':
            print('POST request !')

            stream = BytesIO(request.body)
            data = JSONParser().parse(stream)

            print(data)

            serializer = FriendSerializer(data=data)

            print(serializer.is_valid())

        else:
            print('Not a POST request!')

        return HttpResponse('Nothing')

Thus, to simulate a client with a POST request, I use the following lines:

import requests
import json

json_data = json.dumps({'login': 'mylogin', 'password': 'mypassword', 'mail': 'mymail'})
r = requests.post('http://127.0.0.1:8000/register_new_user', json=json_data)

However, although the print(data) retrieves, as expected,

{"login": "mylogin", "mail": "mymail", "password": "mypassword"} 

The serializer.is_valid() always returns False .

Am I missing any processing of my request?

EDIT:

I got the following info with serializer.errors :

{'non_field_errors': ['Invalid data. Expected a dictionary, but got str.']}

Answer 1

You dont have to convert a dictionary to string when using requests library's json option. This should work:

import requests

data = {'login': 'mylogin', 'password': 'mypassword', 'mail': 'mymail'}
r = requests.post('http://127.0.0.1:8000/register_new_user', json=data)

Answer 2

The solution is to use ast.literal_eval(request.data) to convert the string to a dictionary. I use request.data instead of manually parsing request.body .

However, v1k45's answer is the best solution, as I do not need to convert my dict to a string before sending my request.