在Django模型中没有定义名称

I have a Django app with the following in its models.py file:

我有一个Django应用程序，它的模型如下。py文件:

from django.db import models

class Event(models.Model):
    date = models.DateField()
    name = models.TextField(max_length=60)
    venue = models.ForeignKey(Venue)

    def __unicode__(self):
        return self.name

class Venue(models.Model):
    name = models.TextField(max_length=60)
    street_address = models.TextField(max_length=60)
    locality = models.TextField(max_length=60)
    region = models.TextField(max_length=60)
    postal_code = models.TextField(max_length=60)
    country_name = models.TextField(max_length=60)
    latitude = models.DecimalField(max_digits=9, decimal_places=6)
    longitude = models.DecimalField(max_digits=9, decimal_places=6)

    def __unicode__(self):
        return self.name

But when I run python manage.py syncdb I get the following error:

但是当我运行python管理时。py syncdb我得到以下错误:

NameError: name 'Venue' is not defined

NameError:没有定义“地点”的名称

Why is this when class Venue is in the file? Have I done something wrong? I’ve just been following the Django tutorial at https://docs.djangoproject.com/en/1.5/intro/tutorial01/.

为什么当类地在文件中?我做错什么了吗?我刚刚学习了Django教程，网址是https://docs.djangoproject.com/en/1.5/intro/tutorial01/。

1 个解决方案

#1

Move the definition of Venue before the definition of Event. The reason is that Event references the Venue class in its ForeignKey relationship before Venue is defined.

在事件定义之前移动场地的定义。其原因是在定义场地之前，事件在其对外关系中引用了场馆类。

Or you can do this:

或者你可以这样做:

venue = models.ForeignKey('Venue')

#1