异常类型：/music/1/favorite/ 处的值错误 异常值：int() 的文字无效，基数为 10：'on'

Question

我是Django的新手，我使用的是它的最新版本2。我指的是本教程https://www.youtube.com/watch?v=irH98-4eKmQ&list=PL6gx4Cwl9DGBlmzzFcLgDhKTTfNLfX1IK&索引=24

我收到这个错误。我尝试了很多，但都没能解决这个问题。值错误在/music/1/favorite/

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:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangocorehandlersexception.py" in inner
35.             response = get_response(request)
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangocorehandlersbase.py" in _get_response
128.                 response = self.process_exception_by_middleware(e, 
request)
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangocorehandlersbase.py" in _get_response
126.                 response = wrapped_callback(request, *callback_args, 
**callback_kwargs)
File "C:UsersAdeshDesktopwebsitemusicviews.py" in favourite
22.         selected_song = album.song_set.get(pk=request.POST['song'])
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangodbmodelsmanager.py" in manager_method
82.                 return getattr(self.get_queryset(), name)(*args, 
**kwargs)
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangodbmodelsquery.py" in get
394.         clone = self.filter(*args, **kwargs)
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangodbmodelsquery.py" in filter
836.         return self._filter_or_exclude(False, *args, **kwargs)
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangodbmodelsquery.py" in _filter_or_exclude
854.             clone.query.add_q(Q(*args, **kwargs))
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangodbmodelssqlquery.py" in add_q
1253.         clause, _ = self._add_q(q_object, self.used_aliases)
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangodbmodelssqlquery.py" in _add_q
1277.                     split_subq=split_subq,
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangodbmodelssqlquery.py" in build_filter
1215.         condition = self.build_lookup(lookups, col, value)
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangodbmodelssqlquery.py" in build_lookup
1085.         lookup = lookup_class(lhs, rhs)
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangodbmodelslookups.py" in __init__
18.         self.rhs = self.get_prep_lookup()
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangodbmodelslookups.py" in get_prep_lookup
68.             return self.lhs.output_field.get_prep_value(self.rhs)
File "C:UsersAdeshAppDataLocalProgramsPythonPython36libsite- 
packagesdjangodbmodelsfields__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'

这是我的详细信息.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})

Answer 1

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：

1. 您不关闭标签(使用>(；以及
2. 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时，我们得到：

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

因此，由于value属性出现错误，根据浏览器的说法，没有value="..."属性，因此可以说，它对'on'作为默认字符串进行了"*回退*"。

Answer 2

在django shell中键入./manage.py shell尝试此操作

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，并共享结果