我无法在 django 模板中显示此外键 table 值

Question

我无法在我的模板中显示某些外键值。这是题中涉及的两个模型：

** Models.py **

class Portfolio(models.Model):
    title = models.CharField(max_length= 50, null= True)
    description = models.TextField(max_length= 300, null= True)

class Spotify_Playlist(models.Model):
    portfolio = models.ForeignKey(Portfolio, on_delete= models.CASCADE, null= True)
    title = models.CharField(max_length= 50)
    spotify_url = models.CharField(max_length= 50)
    description = models.TextField(max_length= 100, null= True)
    artist_img = models.ImageField(null= True, upload_to= 'image/')

*** Admin.py ***

@admin.register(Portfolio)
class PortfolioAdmin(admin.ModelAdmin):
    inlines = [
        SpotyListInline,
        SpotySingleInline,
        YoutubeInline,
    ]

class SpotyListInline(admin.TabularInline):
    model = Spotify_Playlist

所以我想在我的模板中像这样显示 spotify 播放列表

*** index.html ***

 <section id="portfolio">
                {% for portfolio in portfolios %}
                    <h1>{{ portfolio.title }}</h1>
                    <p>{{ portfolio.description }}</p>
                    {% for playlist in portfolio.Spotify_Playlist_set.all %}
                        <p>{{playlist.title}}</p>
                        <iframe src='https://open.spotify.com/embed/playlist/{{ playlist.spotify_url }}'
                        width="50%" height="380" frameBorder="0" allowtransparency="true" allow="encrypted-media"></iframe>
                    {% endfor %}    
                {% endfor %}
            </section>

但是 {{playlist.title}} 和带有 {{playlist.spotify_url}} 的嵌入式播放器没有显示。我真的很感激任何帮助

Answer 1

默认的反向关系名称是小写的。尝试：

{% for playlist in portfolio.spotify_playlist_set.all %}

来自文档 https://docs.djangoproject.com/en/dev/topics/db/queries/#following-relationships-backward:

If a model has a ForeignKey, instances of the foreign-key model will have access to a Manager that returns all instances of the first model. By default, this Manager is named FOO_set, where FOO is the source model name, lowercased. This Manager returns QuerySets, which can be filtered and manipulated as described in the “Retrieving objects” section above.

我无法在 django 模板中显示此外键 table 值

I can't get this foreignkey table value to be displayed in the django template

django

model

foreign-keys

django-templates

django-models