Django, Django Rest Framework, Postman validator of type of request in a Class Based View (API)

request_validator.txt

'''
When you're developing an Endpoint with Django Rest Framework, in some situations you'll want to re-use it for generating example data, make tests (e.g. in DRF API View, Postman, Swagger IO...) and also to use it in your web app. For that reason, you'll receive differents types of request. On way to handle with this problem, is to create a decorator method to validate the type of request and then, in your CFA or CVB call the decorator.

_instance= MyNameViewSet()
_instance.endpoint_name(request,param1=1,param2=1)
'''

# Request validation is like that:

from functools import wraps
from rest_framework import exceptions

def validate_request(f):
    @wraps(f)
    def decorator(*args, **kwargs):
        if(len(kwargs) > 0):
            # HTML template
            kwargs['data'] = kwargs
        # DRF API View, Postman POST request made by body (JSON)
        elif len(args[1].data) > 0:
            kwargs['data'] = args[1].data
        # Postman POST request made by params
        elif len(args[1].query_params.dict()) > 0:
            kwargs['data'] = args[1].query_params.dict()
        return f(*args,**kwargs)
    return decorator

# This return a dict. Then in your api.py:

class MyNameViewSet(viewsets.ModelViewSet):
  '''Some atributes: queryset...'''

	@validate_request
	@action(methods=['post'], detail=False)
	def endpoint_name(self, *args, **kwargs):
		param1 = kwargs['data']['param1']   # You can access to your params like this
		'''some logic'''