Delete all documents in a MongoDB collection via Django backend and Angular frontend - django

Question

I have managed to write code to add a customer to my MongoDB collection from my Angular service method to my Django http function, as follows:
const httpOptions = {
headers: new HttpHeaders({
'Content-Type': 'application/json',
'Accept': 'application/json'
}),
withCredentials: false
}
#Injectable()
export class MongoService {
myApiBaseUrl = "http://localhost:8000/mydjangobaselink/";
constructor(private httpClient: HttpClient) { }
addCustomer(customerFormInfo: Customer): Observable<Customer> {
return this.httpClient.post<Customer>(`${this.myApiBaseUrl}`, JSON.stringify(customerData), httpOptions);
}
deleteCustomer(): Observable<Customer> {
return this.httpClient.delete<Customer>(`${this.myApiBaseUrl}`);
}
}
#csrf_exempt
#api_view(['GET', 'POST', 'DELETE'])
def handle_customer(request):
if request.method == 'POST':
try:
customer_data = JSONParser().parse(request)
customer_serializer = CustomerModelSerializer(data=customer_data)
if customer_serializer.is_valid():
customer_serializer.save()
# Write customer data to MongoDB.
collection_name.insert_one(customer_serializer.data)
response = {
'message': "Successfully uploaded a customer with id = %d" % customer_serializer.data.get('id'),
'customers': [customer_serializer.data],
'error': ""
}
return JsonResponse(response, status=status.HTTP_201_CREATED)
else:
error = {
'message': "Can not upload successfully!",
'customers': "[]",
'error': customer_serializer.errors
}
return JsonResponse(error, status=status.HTTP_400_BAD_REQUEST)
except:
exceptionError = {
'message': "Can not upload successfully!",
'customers': "[]",
'error': "Having an exception!"
}
return JsonResponse(exceptionError, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
elif request.method == 'DELETE':
try:
CustomerModel.objects.all().delete()
# Delete customer data from MongoDB.
collection_name.deleteMany({})
return HttpResponse(status=status.HTTP_204_NO_CONTENT)
except:
exceptionError = {
'message': "Can not delete successfully!",
'customers': "[]",
'error': "Having an exception!"
}
return JsonResponse(exceptionError, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
The POST method works fine and I can see the added document in my MongoDB Compass, but when I try to delete, I get:
DELETE http://localhost:8000/mydjangobaselink/ 500 (Internal Server Error)
All the posts and articles I have seen address communication issues in the browser, local host, etc... but given that my posting method works fine, I don't think that is my issue. Also, in Postman, I get Can not delete successfully!
Can anyone see what might be wrong that I cannot delete from database?

Answer 1

Try with collection_name.delete_many({})
https://pymongo.readthedocs.io/en/stable/api/pymongo/collection.html#pymongo.collection.Collection.delete_many
Edit: as pointed by #NKSM, there is the documentation copied:
delete_many(filter, collation=None, hint=None, session=None)
Delete one or more documents matching the filter:
>>> db.test.count_documents({'x': 1})
3
>>> result = db.test.delete_many({'x': 1})
>>> result.deleted_count
3
>>> db.test.count_documents({'x': 1})
0