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Prefetch articles when loading related articles

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Gabriel Augendre 2021-03-20 11:33:55 +01:00
parent 5260669693
commit b5f3331386
1 changed files with 6 additions and 2 deletions
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8
articles/models.py
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@ -8,6 +8,7 @@ from django.conf import settings
from django.contrib.auth.models import AbstractUser from django.contrib.auth.models import AbstractUser
from django.contrib.contenttypes.models import ContentType from django.contrib.contenttypes.models import ContentType
from django.db import models from django.db import models
from django.db.models import Prefetch
from django.template.defaultfilters import slugify from django.template.defaultfilters import slugify
from django.urls import reverse from django.urls import reverse
from django.utils import timezone from django.utils import timezone
@ -131,8 +132,11 @@ class Article(models.Model):
@cached_property @cached_property
def get_related_articles(self): def get_related_articles(self):
related_articles = set() related_articles = set()
for tag in self.tags.all(): published_articles = Article.objects.filter(status=Article.PUBLISHED)
related_articles.update(tag.articles.filter(status=Article.PUBLISHED)) for tag in self.tags.all().prefetch_related(
Prefetch("articles", published_articles, to_attr="published_articles")
):
related_articles.update(tag.published_articles)
sample_size = min([len(related_articles), 3]) sample_size = min([len(related_articles), 3])
return random.sample(related_articles, sample_size) return random.sample(related_articles, sample_size)