Sql ，5，6）而不是左连接，但足够公平。现在我想将prefetch_related（）链接到两个级别的反向ForeignKeys，但我将把它留到另一个时间。干杯 class PhotoAlbum(models.Model): title = model

，5，6）而不是

左连接

，但足够公平。现在我想将

prefetch_related（）

链接到两个级别的反向

ForeignKey

s，但我将把它留到另一个时间。干杯

class PhotoAlbum(models.Model):
    title = models.CharField(max_length=128)
    author = models.CharField(max_length=128)

class Photo(models.Model):
    album = models.ForeignKey('PhotoAlbum')

SELECT * FROM
    (SELECT * FROM photoalbum WHERE title LIKE 'The%' LIMIT 10) AS selected_albums
LEFT JOIN photo ON photo.album_id = selected_albums.id

PhotoAlbum.objects.filter(title__startswith='The').prefetch_related('photo')[:10]

prefetch_related('something', 'something_else', 'foo')

   >>> pizzas = Pizza.objects.prefetch_related('toppings')
   >>> [list(pizza.toppings.filter(spicy=True)) for pizza in pizzas]

for p in PhotoAlbum.objects.filter(title__startswith='The'):
    p.photo_set.all()

for album in PhotoAlbum.objects.filter(title__startswith='The').prefetch_related('photo_set')[:10]:
    print album.photo_set.all()