异常类型：ValueError at /music/1/favourite/ 异常值：int() 的无效文字，基数为 10：'on'

Posted 2023-02-24

【中文标题】异常类型：ValueError at /music/1/favourite/ 异常值：int() 的无效文字，基数为 10：\'on\'

【英文标题】：Exception Type: ValueError at /music/1/favourite/ Exception Value: invalid literal for int() with base 10: 'on'异常类型：ValueError at /music/1/favourite/ 异常值：int() 的无效文字，基数为 10：'on'

【发布时间】：2019-01-01 01:05:28

【问题描述】：

我是 Django 新手，我正在使用它的最新版本 2。我指的是这个特定的教程 https://www.youtube.com/watch?v=irH98-4eKmQ&list=PL6gx4Cwl9DGBlmzzFcLgDhKTTfNLfX1IK&index=24

我收到此错误。我尝试了很多，但无法解决问题。 /music/1/favourite/处的值错误

 Environment:


Request Method: POST
Request URL: http://127.0.0.1:8000/music/1/favourite/

Django Version: 2.0.7
Python Version: 3.6.6
Installed Applications:
['music.apps.MusicConfig',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback:

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\core\handlers\exception.py" in inner
  35.             response = get_response(request)

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\core\handlers\base.py" in _get_response
  128.                 response = self.process_exception_by_middleware(e, 
request)

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\core\handlers\base.py" in _get_response
  126.                 response = wrapped_callback(request, *callback_args, 
**callback_kwargs)

File "C:\Users\Adesh\Desktop\website\music\views.py" in favourite
  22.         selected_song = album.song_set.get(pk=request.POST['song'])

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\db\models\manager.py" in manager_method
  82.                 return getattr(self.get_queryset(), name)(*args, 
**kwargs)

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\db\models\query.py" in get
  394.         clone = self.filter(*args, **kwargs)

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\db\models\query.py" in filter
  836.         return self._filter_or_exclude(False, *args, **kwargs)

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\db\models\query.py" in _filter_or_exclude
  854.             clone.query.add_q(Q(*args, **kwargs))

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\db\models\sql\query.py" in add_q
  1253.         clause, _ = self._add_q(q_object, self.used_aliases)

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\db\models\sql\query.py" in _add_q
  1277.                     split_subq=split_subq,

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\db\models\sql\query.py" in build_filter
  1215.         condition = self.build_lookup(lookups, col, value)

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\db\models\sql\query.py" in build_lookup
  1085.         lookup = lookup_class(lhs, rhs)

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\db\models\lookups.py" in __init__
  18.         self.rhs = self.get_prep_lookup()

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\db\models\lookups.py" in get_prep_lookup
  68.             return self.lhs.output_field.get_prep_value(self.rhs)

File "C:\Users\Adesh\AppData\Local\Programs\Python\Python36\lib\site- 
packages\django\db\models\fields\__init__.py" in get_prep_value
  947.         return int(value)

Exception Type: ValueError at /music/1/favourite/
Exception Value: invalid literal for int() with base 10: 'on'

这是我的 details.html（模板）

<img src=" album.album_logo">

<h1> album.album_title </h1>
<h2> album.artist </h2>

% if error_message %
	<p><strong> error_message </strong></p>
% endif %

<form action="% url 'music:favourite' album.id %" method="post" >
	% csrf_token %
	% for song in album.song_set.all %
		<input type="radio" id="song forloop.counter " name="song" value" song.id "
		<label for="song  forloop.counter ">
			 song.song_title 
			% if song.is_favourite %
				<img src="random_img.png"/>
			% endif %
		</label><br>
	% endfor %
	<input tye="submit" value="Favourite">
</form>

这是我的观点.py

from django.shortcuts import render, get_object_or_404
from .models import Album, Song

def index(request):
    all_albums = Album.objects.all()
    context=
            'all_albums':all_albums,
        
    return render(request, 'music/index.html',context)

def detail(request,album_id):
    album = get_object_or_404(Album, pk=album_id)
    return render(request, 'music/detail.html','album':album)

def favourite(request, album_id):
    album = get_object_or_404(Album, pk=album_id)
    try:
        selected_song = album.song_set.get(pk=request.POST['song'])
    except (KeyError, Song.DoesNotExist):
        return render(request, 'music/details.html',
            'album': album,
            'error_message':"You did not select a valid song",
            )
    else:
        selected_song.is_favourite = True
        selected_song.save()
        return render(request, 'music/detail.html','album': album)

【问题讨论】：

错误与album.song_set.get(pk=request.POST['song'])有关，'song'不包含id，但'on'。

【参考方案1】：

您的模板中的以下行存在一些问题：

<input type="radio" id="song forloop.counter " name="song" value" song.id "

两个重要的问题是：

您没有关闭标签（使用>）；和 您忘记了value 属性的=：它应该是value=" song.id " 而不是value" song.id "。

所以当我们修复这些问题时，我们得到：

<input type="radio" id="song forloop.counter " name="song" value=" song.id ">

由于您在value 属性上出现错误，根据浏览器的说法，没有value="..." 属性，因此它对'on' 做了一个“* fallback*”作为默认字符串可以这么说.

【参考方案2】：

在 django shell 中输入 ./manage.py shell 试试这个

from .models import Album, Song
[song.id for song in Song.objects.all()]
# This will display all the songs id's of your Song model.

现在检查所有歌曲对象是否只有整数 id 并分享结果