這看起來好像很簡單,但我一直無法找到解決這個特定問題的答案。 本質上,我想讓我的Django模板循環瀏覽在該頁面視圖中創建的列表。但是,當我嘗試運行它時,我得到「屬性錯誤: '列表'對象沒有屬性'get'」。我一直試圖擴展Django民意調查應用程序,這個應用程序的想法是讓書籍按作者排序進行投票。因此,這個觀點將會顯示一個表格,其中一邊是作者的名字,另一邊是每個作者書中的總票數。
這裏是模型。
django模板中的循環 - 列表對象沒有屬性'get'
class Author(models.Model):
author_name = models.CharField(max_length=200)
def __unicode__(self):
return self.author_name
class Book(models.Model):
author = models.ForeignKey(Author)
title = models.CharField(max_length=200)
votes = models.IntegerField(default=0)
def __unicode__(self):
return self.title
這裏是我的作家試圖組的票,並將它們添加到列表視圖。
def totals(request):
a = Author.objects.order_by('author_name')
b = Book.objects.order_by('author__author_name')
total = []
for i in range(len(b)):
if i < len(b)-1:
x = b[i].votes
if b[i].author == b[i+1].author:
x += b[i+1].votes
else:
total.append(x)
else:
x = b[i].votes
total.append(x)
return total
return render(request, "book/totals.html", {"a":a, "total":total})
這裏是模板。第一個for循環的「a」工作正常,第二個應該循環通過「總計」,這是行不通的。
<h1>Total Votes</h1>
<table style="border-collapse:collapse;">
<thead>
<tr>
<th colspan="2"><strong>Totals</strong></th>
</tr>
<tr style="border-bottom:1px solid black;">
<th style="padding:5px;"><em>Authors</em></th>
<th style="padding:5px;border-left:1px solid black;"><em>Votes</em></th>
</tr>
</thead>
{% for author in a %}
<tr>
<td>{{ author }}</td>
</tr>
{% endfor %}
{% for x in total %}
<tr>
<td>{{ total[x] }}</td>
</tr>
{% endfor %}
</thead>
好吧,我想,大約做的。感謝任何讀到此爲止的人。很顯然,我對此很新,所以如果有任何其他評論或任何人的反饋,我一定會很感激聽到他們。 謝謝!
編輯:這裏是回溯 -
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/book/totals/
Django Version: 1.8.3
Python Version: 2.7.10
Installed Applications:
('django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'book')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.security.SecurityMiddleware')
Traceback:
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
223. response = middleware_method(request, response)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/middleware/clickjacking.py" in process_response
31. if response.get('X-Frame-Options', None) is not None:
Exception Type: AttributeError at /book/totals/
Exception Value: 'list' object has no attribute 'get'
這樣做!謝謝! – seeonsee