Question

我尝试使用具有特定类别的类Book过滤作者，但我无法获得确切的类别。

models.py

class Book(models.Model):
    category = models.CharField()
    foreignkey = models.ForeignKey(Author, related_name="auth")
class Author(models.Model):
    author_id = models.IntegerField(primary_key=True)

views.py

book = models.Book.objects.filter(category = 'Space')
author = models.Author.objects.filter(author_id__in = book )

Answer 1

class Book(models.Model):
    category = models.CharField()
    author = models.ForeignKey(Author, related_name='books')

class Author(models.Model):
    # pks are added automatically

在views.py

中

books = models.Book.objects.filter(category='Space')
authors = models.Author.objects.filter(pk__in=[b.author_id for b in books])

Answer 2

/feeds/feed.xml

两个表过滤器

2 个答案: