I am new to Django and I am using it's latest version 2. I am referring to this particular tutorial https://www.youtube.com/watch?v=irH98-4eKmQ&list=PL6gx4Cwl9DGBlmzzFcLgDhKTTfNLfX1IK&index=24
I am getting this error. I tried a lot but couldn't fix the issue. ValueError at /music/1/favourite/
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'
This is my details.html (template)
<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>This is my view.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})
There are some problems with the following line in your template:
<input type="radio" id="song{{ forloop.counter }}" name="song" value"{{ song.id }}"
The two important problems are:
>); and= for the value attribute: it should be value="{{ song.id }}" instead of value"{{ song.id }}".So when we fix those, we get:
<input type="radio" id="song{{ forloop.counter }}" name="song" value="{{ song.id }}">
Since you thus had an error with the value attribute, according to the browser, there was no value="..." attribute, and thus it did a "* fallback*" to 'on' as a default string so to speak.