Question

是否可以将下面的sql转换为django orm调用，还是必须使用原始sql？

感谢您的帮助

我的模特：

class Parent(models.Model):
    slug = models.SlugField()

class Child(models.Model):
    slug = models.SlugField()
    parent = models.ForeignKey('Parent')
    value = models.CharField(max_length=128)

我的sql：

select *
from parent as p
  left join child as c on p.id = c.parent_id and c.slug in ('s0','s1','s2')
where p.id not in (select p.id
                   from parent as p
                     inner join child as c on p.id = c.parent_id and c.slug = 's3' and c.value = 'v3')
order by p.slug

Answer 1

Parent.objects.filter(child__slug__in=['s0','s1','s2']).exclude(child__slug='s3', child__value='v3').order_by('slug')

虽然排除child.slug =='s3'的位置，但是当它不在__in数组中时，不应该首先包含在内。

<强>更新

要包含没有孩子的父母，请在过滤器中使用Q个对象：

from django.db.models import Q

Parent.objects.filter(Q(child__isnull=True) | Q(child__slug__in=['s0','s1','s2']))

需要帮助将SQL转换为ORM调用

1 个答案: