python - 具有标量值的 Django 子查询

Question

是否可以使用 Django ORM 将子查询结果与标量值进行比较？我很难转换它:

SELECT payment_subscription.*
FROM payment_subscription payment_subscription
  JOIN payment_recurrent payment_recurrent ON payment_subscription.id = payment_recurrent.subscription_id
WHERE
  payment_subscription.status = 1
  AND (SELECT expiration_date
       FROM payment_transaction payment_transaction
       WHERE payment_transaction.company_id = payment_subscription.company_id
             AND payment_transaction.status IN ('OK', 'Complete')
       ORDER BY payment_transaction.expiration_date DESC, payment_transaction.id DESC
       LIMIT 1) <= ?

要点是:

1. 子查询标量值与任意参数的最后一次比较。
2. 子查询和外部查询与公司 ID 之间的连接

Answer 1

Subscription.objects.annotate(
    max_expiraton_date=Max('transaction__expiration_date')
).filter(
    status=1,
    recurrent__isnull=False,  # [inner] join with recurrent
    transaction__status__in=['OK', 'Complete'],
    max_expiraton_date=date_value
)

这会生成其他 SQL 查询，但会获取相同的 Subscription 对象。