【发布时间】:2017-04-25 18:50:11
【问题描述】:
我将如何在 Django 中编写以下 SQL 查询。
SELECT COUNT(*)
FROM accounts_transactions
LEFT JOIN accounts_notes
ON accounts_notes.accounts_core_id = accounts_transactions.accounts_core_id
WHERE email_status='clicked' AND email_template_id IS NOT NULL
AND accounts_transactions.creation_date >= accounts_notes.creation_date
AND accounts_transactions.creation_date <= accounts_notes.creation_date + INTERVAL 7 DAY;
模型的结构方式是。
Account(model):
id
AccountTransactions(model):
creation_date
account_core_id = Account
AccountNote(model):
account_core_id = Account
creation_date
email_status
email_template
查询工作正常,但我似乎无法弄清楚如何在 django 中编写它。阅读有关预取的相关信息,但我不知道我是如何做到的,因为笔记和交易之间没有直接的联系。
更新:解决方案
queryset = AccountTransaction.objects.filter(
account__note__email_template__isnull=False,
account__note__email_status='clicked',
creation_time__gte=F('account__note__creation_time'),
creation_time__lte=F(
'account__note__creation_time') + timedelta(days=7)
)
【问题讨论】:
标签: mysql django python-3.x