[Python] How to restrict a foreign key form field based on previously selected field?

To preface this I know that there are some previous posts about this but the answers refer to using 3rd party packages and I was wondering if there is a solution using vanilla Django as these posts are a few years old.

I am creating an music based app which has models for Artists, Albums and Tracks. What I'd like to do is when adding new tracks in the admin panel, if I select an Artist in the form then the Album choices are restricted to ones by that Artist but can't find anyway to make this work, at first I thought I may have been able to use "__" to make the relation, like in list_filter for the model admin but that didn't work.

I added the artist field to the Track while trying to find a solution for this but am unsure if it is required.

I am yet to develop most of the views for this app, this is currently just for the admin panel to add new tracks.

class Artist(models.Model):
name = models.CharField(max_length=100, verbose_name="Artist")
genre = models.CharField(max_length=100)
country = CountryField(blank_label="(select country)")
is_approved = models.BooleanField(default=False)

def __str__(self):
return self.name


class Album(models.Model):
artist = models.ForeignKey(Artist, on_delete=models.CASCADE)
name = models.CharField(max_length=100, verbose_name="Album")
release_date = models.DateField()
is_approved = models.BooleanField(default=False)

def __str__(self):
return self.name


class Track(models.Model):
artist = models.ForeignKey(Artist, on_delete=models.CASCADE, verbose_name="Artist")
album = models.ForeignKey(Album, on_delete=models.CASCADE, verbose_name="Album")
listing_num = models.IntegerField(default=0)
title = models.CharField(max_length=100)
duration = models.CharField(max_length=10)
spotify_link = models.CharField(max_length=256)
apple_music_link = models.CharField(max_length=256)
is_approved = models.BooleanField(default=False)

def __str__(self):
return self.title


class TrackForm(ModelForm):
class Meta:
model = Track
fields = [
"artist",
"album",
"listing_num",
"title",
"duration",
"spotify_link",
"apple_music_link",
]


Here is the code for TrackAdmin:

class TrackAdmin(admin.ModelAdmin):
model = Track
list_display = [
"artist",
"album",
"listing_num",
"title",
"duration",
"is_approved",
]
list_filter = ["album__name", "artist__name", "is_approved"]

Continue reading...