Question

我有以下模特：

class Author(models.Model):
   name = models.CharField(max_length=255, unique=True)
   """books = Attribute which allows an access to books from this author"""
   class Meta:
      ordering = ['name']


class Book(models.Model):
   name = models.CharField(max_length=255, unique=True)
   author = models.ForeignKey(Author, on_delete=models.CASCADE)
   class Meta:
      ordering = ['name']

如何为Author创建一个属性，允许我访问其书籍？

Answer 1

您无需在var query = itemTable.query() query.fetchLimit = 300 query.orderByDescending("__createdAt")中创建新属性。您可以按照以下Author关系向后获取特定作者撰写的书籍：

ForeignKey

当您在author = Author.objects.get(name='George Orwell') books = author.book_set.all()和book_set之间建立ForeignKey关系时，Django默认创建Book函数。

来自另一个模型的Django外键引用

1 个答案: