我正在关注buckys django教程,他解释了如何添加专辑而不是歌曲,我想尝试将歌曲添加到特定专辑中,但是不起作用。
我在views.py中添加了一个SongCreate视图,还创建了一个用于输入歌曲详细信息的song_form.html模板。我还尝试了form_valid方法,但它不仅有效。
class AlbumCreate(CreateView):
model=Albums
fields=['alb_title','alb_genre','alb_logo','alb_artist']
class SongCreate(CreateView):
model = Song
fields = ['song_title', 'song_format']
def form_valid(self, form):
album = get_object_or_404(Albums, pk=self.kwargs['pk'])
form.instance.album = album
return super(SongCreate, self).form_valid(form)
#My urls.py
app_name ='music'
urlpatterns = [
path('',views.IndexView.as_view(), name='index'),
path('<int:pk>/', views.DetailView.as_view(), name='detail'),
path('album/add/', views.AlbumCreate.as_view(), name='album-add'),
path('album/<int:pk>/songadd/', views.SongCreate.as_view(),
name='song-add'),
path('album/<int:pk>/', views.AlbumUpdate.as_view(), name='album-
update'),
path('album/<int:pk>/delete/', views.AlbumDelete.as_view(),
name='album-delete'),
]
#My song_form.html template
{% extends 'music/base.html' %}
{% block title %}Add New Song{% endblock %}
{% block body %}
<div class="container-fluid">
<h4>Add the details of the Song in the given fields.</h4>
<div class="row">
<div class="col-sm-12 col-md-7">
<div class="panel panel-default">
<div class="panel-body">
<form class='form-horizontal' action=""
method="post"
enctype="multipart/form-data">
{% csrf_token %}
{% include 'music/form-template.html' %}
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<button type="submit" class="btn btn-
success">Submit</button>
</div>
</div>
</form>
</div>
</div>
</div>
</div>
</div>
{% endblock %}
#Models.py
class Albums(models.Model):
alb_title = models.CharField(max_length = 250)
alb_genre = models.CharField(max_length = 250)
alb_logo = models.FileField()
alb_artist = models.CharField(max_length = 250)
def get_absolute_url(self):
return reverse("music:detail", kwargs={"pk": self.pk})
def __str__(self):
return self.alb_title + '-' + self.alb_artist
class Song(models.Model):
song = models.ForeignKey(Albums, on_delete = models.CASCADE)
song_title = models.CharField(max_length = 250)
song_format = models.CharField(max_length = 10)
is_favourite = models.BooleanField(default=False)
def __str__(self):
return self.song_title
def get_absolute_url(self):
return reverse('music:detail', kwargs={'pk': self.song.pk})
单击添加歌曲时,它会将我定向到填写歌曲详细信息的表单,但是当我尝试时,我得到了: / music / album / song / add /中的IntegrityError NOT NULL约束失败:music_song.song_id
答案 0 :(得分:0)
我给你我使用form_valid()
def form_valid(self, form):
album = get_object_or_404(Albums, pk=self.kwargs['pk'])
form = form.save(commit=False)
form.album = album
form.save()
return super().form_valid(form)
如果它不起作用,则意味着您所做的更改未反映在数据库中。运行./manage.py makemigrations
和./manage.py migrate
。如果可能的话,可能有必要删除并重新创建整个数据库。
答案 1 :(得分:0)
您必须:
def create_song(request):
if request.method == "POST":
form.save()