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Python Django ORM Total Control F objects

Anusha Rao
PLUS
Anusha Rao
Courses Plus Student 972 Points
Posted by Anusha Rao
Anusha Rao
Courses Plus Student 972 Points

Double the rating field using F .

I don't know where am I going wrong here!

products/emergency.py 
from django.db.models import F

from .models import Review

def double_ratings():
    reviews = Review.objects.all()
    reviews.update(rating = F('rating') * 2)
    reviews.save()

1 Answer

Idai Yaffe
Idai Yaffe
20,429 Points
Idai Yaffe
Idai Yaffe
20,429 Points

You do not need to save the objects after an update so the 'reviews' variable is unnecessary.

Just use:

def double_ratings():
    Review.objects.update(rating=F('rating')*2)

I think your code will work and the challenge doesn't like it but I'm not sure

Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

Promoting to answer. The code will work if Anusha's import statement is used. It differs from the initial import provided by the challenge. Anusha's allows referencing Review directly and not needed to use models.Review.