registration_view.py

from rest_framework.decorators import api_view, authentication_classes, permission_classes

# Register
# Response: https://gist.github.com/mitchtabian/c13c41fa0f51b304d7638b7bac7cb694
# Url: https://<your-domain>/api/account/register
@api_view(['POST', ])
@permission_classes([])
@authentication_classes([])
def registration_view(request):

	if request.method == 'POST':
		data = {}
		email = request.data.get('email', '0')
		if validate_email(email) != None:
			data['error_message'] = 'That email is already in use.'
			data['response'] = 'Error'
			return Response(data)

		username = request.data.get('username', '0')
		if validate_username(username) != None:
			data['error_message'] = 'That username is already in use.'
			data['response'] = 'Error'
			return Response(data)

		serializer = RegistrationSerializer(data=request.data)
		
		if serializer.is_valid():
			account = serializer.save()
			data['response'] = 'successfully registered new user.'
			data['email'] = account.email
			data['username'] = account.username
			data['pk'] = account.pk
			token = Token.objects.get(user=account).key
			data['token'] = token
		else:
			data = serializer.errors
		return Response(data)

def validate_email(email):
	account = None
	try:
		account = Account.objects.get(email=email)
	except Account.DoesNotExist:
		return None
	if account != None:
		return email

def validate_username(username):
	account = None
	try:
		account = Account.objects.get(username=username)
	except Account.DoesNotExist:
		return None
	if account != None:
		return username