Django ManyToManyField错误对象没有属性'location_set' [英] Django ManyToManyField error object has no attribute 'location_set'

问题描述

这似乎是一个非常简单的问题，但是它正在杀死我。

This seems like a really trivial question, but it is killing me.

models.py

models.py

class Location(models.Model):
    place = models.CharField("Location", max_length=30)
    [...]

class Person(models.Model):
    first = models.CharField("First Name", max_length=50)
    [...]
    location = models.ManyToManyField('Location')

从shell：

>>> from mysite.myapp.models import *
>>> p = Person.objects.get(id=1)
>>> p
<Person: bob >
>>> l = Location(place='123 Main')
>>> p.location_set.add(l)
>>> p.save()
Traceback (most recent call last):
  File "<console>", line 1, in <module>
AttributeError: 'Person' object has no attribute 'location_set'

我真的不是看到我失踪了

I'm really not seeing what I'm missing.

推荐答案

不应该使用 p.location.add（）？ location_set 或< modelname> _set 是 反向 查找 。

Shouldn't you be using p.location.add()? location_set or <modelname>_set is the default name for the reverse lookup for that model.

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