纽比呼叫 Django 。我需要列出一些音乐流派及其子流派。我得到了流派刚刚好,但我不知道如何列出子流派。
这是我的模型:
class Genre(models.Model):
genre_id = models.AutoField(primary_key=True)
code = models.CharField(unique=True, max_length=4)
description = models.CharField(max_length=25, blank=False, null=False)
class Meta:
managed = False
db_table = 'genre'
db_table_comment = 'Music genre catalog'
def __str__(self):
return self.description
class Subgenre(models.Model):
subgenre_id = models.AutoField(primary_key=True)
code = models.CharField(unique=True, max_length=6)
description = models.CharField(max_length=25, blank=False, null=False)
genre = models.ForeignKey(Genre, on_delete=models.CASCADE)
class Meta:
managed = False
db_table = 'subgenre'
db_table_comment = 'Music subgenre catalog'
def __str__(self):
return self.description
这是我在www.example.com上找到的views.py:
def new_playlist(request):
genres = Genre.objects.all().order_by('description')
subgenres = Subgenre.objects.all()
context = { 'genres':genres, 'subgenres':subgenres }
return render(request,"applications/ecommerce/playlists/new-playlist.html",context)
这是我的HTML代码:
{% for genre in genres %}
<div class="card">
<div class="card-header">
<h5 class="mb-0">{{genre.description}}</h5>
</div>
<div class="card-body">
{% for subgenre in subgenres.genre.all %}
<div class="row">
<label>{{subgenre.description}}</label>
</div>
{% endfor %}
</div>
</div>
{% endfor %}
1条答案
按热度按时间ijnw1ujt1#
你应该在相反的方向上这样做:
作为视图: