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Start your free trialChris Couch
Front End Web Development Techdegree Graduate 25,326 PointsCan you use select_related on the review_detail view to get the Product at the same time and reduce our queries to 1?
Hello I need help knowing how to complete this challenge
import datetime
from django.db.models import Q, Avg
from django.http import Http404
from django.shortcuts import render, get_object_or_404
from . import models
def good_reviews(request):
reviews = models.Review.objects.filter(rating__gte=3)
return render(request, 'products/reviews.html', {'reviews': reviews})
def recent_reviews(request):
six_months_ago = datetime.datetime.today() - datetime.timedelta(days=180)
reviews = models.Review.objects.exclude(created_at__lt=six_months_ago)
return render(request, 'products/reviews.html', {'reviews': reviews})
def product_detail(request, pk):
try:
product = models.Product.objects.prefetch_related('review_set').get(pk=pk)
except models.Product.DoesNotExist:
raise Http404()
four_weeks_ago = datetime.datetime.today() - datetime.timedelta(weeks=4)
reviews = product.review_set.filter(Q(rating__gte=8)|Q(created_at__gte=four_weeks_ago)).order_by('-created_at').all()
return render(request, 'products/product_detail.html', {'product': product, 'reviews': reviews})
def product_list(request):
products = models.Product.objects.annotate(avg_rating=Avg('review__rating')).all()
return render(request, 'products/product_list.html', {'products': products})
def review_detail(request, product_pk, pk):
try:
review = models.Review.objects.get(product_id=product_pk, pk=pk)
except models.Review.DoesNotExist:
raise Http404()
else:
return render(request, 'products/review_detail.html', {'review': review})
1 Answer
Oszkár Fehér
Treehouse Project ReviewerHi Chris Couch. This is actually very easy if you follow up the video (https://teamtreehouse.com/library/related-records). I could give you the answer but that will not help you, it will help you to pass the quiz.
Pridemore Viriri
10,570 PointsPridemore Viriri
10,570 Pointsdidnt get that correct can you please assist me