Is there any way to clear django.db.connection.queries?

Question

I want to monitor query time in my system(built with Django models).

Finally, I found django.db.connection.queries.

It shows all queries and time taking for it.

Using this, I want to print the list of which I have done queries at regular interval and then I want to clear the list I printed after printing.

It seems to have methods for a list object(pop, remove and so on).

But Even though I call pop(), It doesn’t have any effect, still showing the same length.

How can I clear the list..?

Or Is there any other methods for my intention?

p.s I also found Django-debug-toolbar but it seems only for view part.

Asked By: SangminKim

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Source

Answer 1

You can call reset_queries() from the django.db module.

from django.db import reset_queries
reset_queries()

Answered By: Daniel Roseman

Answer 2

You can use reset_queries() to clear connection.queries.

For example, if putting reset_queries() after Person.objects.select_for_update() as shown below:

# "store/views.py"

from django.db import transaction
from .models import Person
from django.db import reset_queries
from django.db import connection
from django.http import HttpResponse

@transaction.atomic
def test(request):
    Person.objects.create(name="John") # INSERT
    
    qs = Person.objects.select_for_update().get(name="John") # SELECT FOR UPDATE
    reset_queries() # Here
    qs.name = "Tom"
    qs.save() # UPDATE
    qs.delete() # DELETE
                 
    for query in connection.queries: # Here
        print(query)

    return HttpResponse("Test")

You get only UPDATE and DELETE queries without INSERT and SELECT FOR UPDATE queries as shown below:

{'sql': 'UPDATE "store_person" SET "name" = 'Tom' WHERE "store_person"."id" = 190', 'time': '0.000'}
{'sql': 'DELETE FROM "store_person" WHERE "store_person"."id" IN (190)', 'time': '0.000'}
[24/Dec/2022 07:00:01] "GET /store/test/ HTTP/1.1" 200 9

Answered By: Kai – Kazuya Ito

Is there any way to clear django.db.connection.queries?

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