Question

我在 Django 中有一个简单的博客代码，我写了错误和我的代码：

有我的代码模型.py

from django.db import models


class Post(models.Model):
    title = models.CharField(max_length=200)
    author = models.ForeignKey(
        'auth.User',
        on_delete=models.CASCADE,
    )
    body = models.TextField()

    def __str__(self):
        return self.title

views.py

from django.views.generic import ListView
from .models import Post


class BlogListView(ListView):
    model = Post
    template_name = 'home.html'

urls.py

from django.urls import path
from .views import BlogListView

urlpatterns = [
    path('', BlogListView.as_view(), name= 'home')
]

和 home.html

{% extends 'base.html' %}

{% block content %}
  {% for post in object_list %}
    <div class="post-entry">
      <h2><a href="">{{ post.title }}</a></h2>
      <p>{{ post.body }}</p>
    </div>
  {% endfor %}
{% endblock content %}

运行代码后出现错误信息：

AttributeError at /admin/blog/post
'list' object has no attribute 'lower'
Request Method: GET
Request URL:    http://127.0.0.1:8000/admin/blog/post
Django Version: 3.1.5
Exception Type: AttributeError
Exception Value:    
'list' object has no attribute 'lower'
Exception Location: C:\Users\nilaroz\.virtualenvs\blog-Keg_c4F1\lib\site-packages\django\utils\http.py, line 295, in is_same_domain
Python Executable:  C:\Users\nilaroz\.virtualenvs\blog-Keg_c4F1\Scripts\python.exe
Python Version: 3.8.6
Python Path:    
['D:\\MyDjangoProject\\blog',
 'c:\\program files (x86)\\python38-32\\python38.zip',
 'c:\\program files (x86)\\python38-32\\DLLs',
 'c:\\program files (x86)\\python38-32\\lib',
 'c:\\program files (x86)\\python38-32',
 'C:\\Users\\nilaroz\\.virtualenvs\\blog-Keg_c4F1',
 'C:\\Users\\nilaroz\\.virtualenvs\\blog-Keg_c4F1\\lib\\site-packages']
Server time:    Sun, 31 Jan 2021 19:53:08 +0000

为什么？我不做任何清单！ “'list' 对象没有属性 'lower'”是什么意思？我想也许 Django 在调用 for 循环时会列出一个列表！

{% for post in object_list %}

我如何解决这个问题？

Answer 1

我找到了解决办法：我写错了

'DIRS': [str(BASE_DIR.joinpath('templates'))],

在

ALLOWED_HOSTS = []

while 应该写在 "TEMPLATES" 的 settings.py 中

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
        'DIRS': [str(BASE_DIR.joinpath('templates'))],
    },
]

我建议不要在很累的时候编码。睡觉！

/admin/blog/post 'list' 对象的 AttributeError 没有属性 'lower'

1 个答案: