我已經在數據模型以下如何在Django外鍵關係中進行這種查詢?
客戶
有多個地址
有很多信用卡
鑑於信用卡紀錄,我希望能夠發現,我可以將所有地址反對。
基本上我希望能夠寫出這樣的查詢...
SELECT address.line1, address.line2, address.city,
address.state, address.zip FROM
addresses, creditcards
WHERE
addresses.custid = creditcards.custid and
creditcard.number = 'Thenumber#'
我是相當新的Django和我只能想到寫這樣我懷疑的WIL火100S的代碼查詢。
for acard in creditcard.objects.filter(cardno = 'thenumber#'):
for anaddress in Address.objects.filter(customer = acard.customer):
print anaddress.list_values()
是否有不同的設計,我應該採用?我不能想到在這裏使用ManyToMany,因爲它在技術上不是很多很多?我在想這個錯嗎?
這裏是模型我腦子裏想的......
class Customer(models.Model):
pass
class creditcard(models.Model):
customer = models.ForeignKey(Customer)
class addresss(models.Model):
customer = models.ForeignKey(Customer)
line1 = models.CharField()
# etc., etc.,
您可以發佈您的models.py這些模型? – schillingt