Select_related（）向后关系 - 自动模型人口 [英] Select_related() backwards relation - auto model population

问题描述

如果我有以下模型：

class Contact(models.Model)
    name = models.CharField(max_length=100)
    ...

class ContactAddress(models.Model)
    line1 = models.CharField(max_length=100)
    line2 = models.CharField(max_length=100)
    ...
    contact = models.ForeignKey(Contact)

我现在想抓住所有联系人，并且地址被自动填充。这样做最好的方法是什么？目前我发现的唯一方法是过滤掉我想要的联系人，并围绕每个联系人循环并将其分配给Contact.addresses。然后我使用它来输出模板中的每个联系人地址。

I now want to grab all Contacts and for the address to be auto populated. What would be the best way to do this? The only way I have found so far is to filter out the Contacts I want and loop around each contact and assign this to Contact.addresses. I then use this for outputting each Contacts address within a template.

有更好的方法吗？ Select_related（）几乎完成了我想要的，但似乎无法在相反的方向上工作。

Is there a better way of doing this? Select_related() almost does what I want, but doesn't seem to be able to work in the opposite direction.

提前感谢您的帮助！ / p>

Thanks in advance for your help on this one!

推荐答案

你是对的， select_related 只能向前推进！为了使更有效的反向查找参见这个！

You are right, select_related only works forwards! To make more efficient reverse lookups see this!

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