我有一个models.py
定义了以下类的文件:
from django.db import models
from bands.models import Genre, Song
class Lyric(models.Model):
"""A music lyric"""
class Meta:
db_table = 'lyric'
genre = models.ForeignKey(Genre)
song = models.ForeignKey(Song,unique=True)
lyric_text = models.TextField()
created_at = models.DateTimeField()
def __unicode__(self):
return "\"" + self.title + "\" by " + self.author
def lyric_short(self, length=100):
return self.lyric_text[:length] + "..."
class LyricComment(models.Model):
"""Comment on a lyric"""
class Meta:
db_table = 'lyric_comment'
lyric = models.ForeignKey(Lyric)
text = models.TextField()
author = models.CharField(max_length=64)
ip = models.IpAddressField()
created_at = models.DateTimeField()
def __unicode__(self):
return "\"" + self.text[:10] + "...\" by " + self.author
def text_short(self, length=100):
return self.text[:length] + "..."
运行时:
$ python manage.py syncdb
抛出以下错误:
AttributeError: 'module' object has no attribute 'IpAddressField'
有什么问题ip = models.IpAddressField()
?