向模型添加自定义方法时发生错误(来自Django教程)

I'm new to Python and especially to Django. While trying to dive in subj. framework, and run through its official tutorial I got some pain in the neck error which says:

我是Python的新手，尤其是Django的新手。在尝试潜水的时候。框架，和运行它的官方教程，我在脖子上的错误是说:

Attribute error: 'Poll' object has no attribute 'was_published_recently'

属性错误:'Poll'对象没有属性'was_published_recently'

I type the next in django shell (invoked by: "python manage.py shell" from projects directory):

我在django shell中输入下一个(由:“python管理”调用)。来自项目目录的py shell:

>>> from polls.models import Poll, Choice
>>> from django.utils import timezone
>>> p = Poll.objects.get(pk=1)
>>> p.was_published_recently()

从民意调查> > >。模型导入轮询，选择django的>>>。导入时区>>> p = Poll.objects.get(pk=1) >>> p.was_published_recent ()

and I get the next shell output:

得到下一个壳层输出:

Traceback (most recent call last):
File "", line 1, in
AttributeError: 'Poll' object has no attribute 'was_published_recently'"

Traceback(最近一次调用):File“”，第1行，AttributeError:“Poll”对象没有属性“was_published_recently”

Can someone help me to get what am I doing wrong here? Because I just have no idea what can lead to such an error... (Already googled inside out the question, but didn't find an answer that could solve my situation).

有人能帮我弄明白我在这里做错了什么吗?因为我不知道什么会导致这样的错误……(已经在谷歌上彻底搜索了这个问题，但没有找到能解决我的问题的答案)。

I use:
Django version 1.5.1
Python version 2.7.5

我使用:Django版本1.5.1 Python版本2.7.5

Here're my "Poll" model code:

下面是我的“投票”模型代码:

import datetime
from django.utils import timezone
from django.db import models

class Poll(models.Model):
    question = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

    def __unicode__(self):
        return self.question

    def was_published_recently(self):
        return self.pub_date >= timezone.now() - datetime.timedelta(days=1)


class Choice(models.Model):
    poll = models.ForeignKey(Poll)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)

    def __unicode__(self):
        return self.choice_text

Also, here's my "Admin" file:

另外，这是我的“Admin”文件:

from django.contrib import admin
from polls.models import Choice, Poll

class ChoiceInline(admin.TabularInline):
    model = Choice
    extra = 3

class PollAdmin(admin.ModelAdmin):
    fieldsets = [
        (None,               {'fields': ['question']}),
        ('Date information', {'fields': ['pub_date'], 'classes': ['collapse']}),
    ]
    inlines = [ChoiceInline]
    list_display = ('question', 'pub_date', 'was_published_recently')

admin.site.register(Choice)
admin.site.register(Poll, PollAdmin)

2 个解决方案

#1

make sure you use 4 spaces as indentation instead Tab character, tab makes function does not recognize.

请确保您使用4个空格作为缩进，而不是制表符，制表符使函数无法识别。

#2

I think that all it is saying is that you haven't included any was_published_recently function in the class. Thanks for including the admin.py & polls.py files, but I think it's in your models.py file that you need to ensure a couple things. It looks like you need to make sure that

我认为它的意思是您没有在类中包含任何was_published_recent函数。谢谢你的邀请。py和民意调查。py文件，但是我想应该在你们的模型里。需要确保一些东西的py文件。看起来你需要确认一下。

from django.utils import timezone 

def was_published_recently(self):
    return self.pub_date >= timezone.now() - datetime.timedelta(days=1)

are included in your models.py file.

包括在你的模型中。py文件。

#1