Django：过滤在另一个模型中没有相关 OneToOne 条目的模型条目

Question

我有两个模型

class Bike(models.Model):
    ...
    ...

另一个

class Sell_info(models.Model):
    ...
    ...
    bike = models.OneToOneField(Bike, on_delete=models.CASCADE, related_name="sell_info")

我正在过滤那些没有可用相关 Sell_info 条目的自行车。

bikes = Bike.objects.filter('sell_info__isnull=True')

但它遇到了这个问题

ValueError at /new-bikes/
too many values to unpack (expected 2)

Answer 1

将关键字参数传递给过滤器，而不是字符串

bikes = Bike.objects.filter(sell_info__isnull=True)

Django: Filtering model entries that doesn't have a related OneToOne entry in another model