python – 模型FlatPage已经注册

在这一点上,本书希望我将models.py更改为：

class SearchKeyword(models.Model)
    keyword = models.CharField(maxlength=50,core=True)
    page = models.ForeignKey(FlatPage,edit_inline=models.STACKED,min_num_in_admin=3,num_extra_on_change=1)

我知道现在这已经在admin.py中完成了.所以我的models.py看起来像这样：

from django.db import models
from django.contrib.flatpages.models import FlatPage

class SearchKeyword(models.Model):
    keyword = models.CharField(max_length=50)
    page = models.ForeignKey(FlatPage)

    class Admin:
        pass

    def __unicode__(self):
        return self.keyword

我现在创建的admin.py看起来像这样：

from search.models import SearchKeyword
from django.contrib import admin
from django.contrib.flatpages.models import FlatPage

class SearchKeywordInline(admin.StackedInline):
    model = SearchKeyword
    extra = 3

class FlatPageAdmin(admin.ModelAdmin):
    model = FlatPage
    inlines = [SearchKeywordInline]

admin.site.register(FlatPage,FlatPageAdmin)

当我加载管理页面时,我收到：

AlreadyRegistered at /admin/

The model FlatPage is already registered

Exception Value:The model FlatPage is already registered

谢谢！