Сделал Плейлист и добавил рекомендацию на главную страницу

music_storage/music/admin.py

@@ -5,7 +5,11 @@ from django.http import HttpRequest
 from django.urls import reverse
 from django.utils.html import format_html
 
-from music.models import Track, Album, Artist
+from music.models import Track
+from music.models import Album
+from music.models import Artist
+from music.models import Playlist
+from music.models import RecommendationPlaylist
 
 
 @admin.register(Track)
@@ -79,3 +83,23 @@ class ArtistAdmin(admin.ModelAdmin):
         return format_html('<a class="button" href="{}">Add Album</a>', url)
 
     add_album_link.short_description = "Add Album"
+
+
+@admin.register(Playlist)
+class PlaylistAdmin(admin.ModelAdmin):
+    list_display = ("name", "created_by", "created_at")
+    search_fields = ("name",)
+    list_filter = ("created_at",)
+
+
+@admin.register(RecommendationPlaylist)
+class RecommendationPlaylistAdmin(admin.ModelAdmin):
+    list_display = ("name", "is_actual", "created_by", "created_at")
+    search_fields = ("name",)
+    list_filter = ("is_actual", "created_at")
+    actions = ["make_actual"]
+
+    @admin.action(description="Set selected recommendation playlists as actual")
+    def make_actual(self, request: HttpRequest, queryset: Any) -> None:
+        for recommendation in queryset:
+            recommendation.switch_actual()

music_storage/music/migrations/0011_playlist_recommendationplaylist.py

@@ -0,0 +1,48 @@
+# Generated by Django 6.0 on 2026-01-06 11:42
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('music', '0010_album_release_date'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Playlist',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('name', models.CharField(max_length=200)),
+                ('created_by', models.ForeignKey(blank=True, editable=False, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='%(class)s_created', to=settings.AUTH_USER_MODEL)),
+                ('tracks', models.ManyToManyField(related_name='playlists', to='music.track')),
+                ('updated_by', models.ForeignKey(blank=True, editable=False, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='%(class)s_updated', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+        migrations.CreateModel(
+            name='RecommendationPlaylist',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('name', models.CharField(max_length=200)),
+                ('description', models.TextField(blank=True)),
+                ('is_actual', models.BooleanField(default=False)),
+                ('created_by', models.ForeignKey(blank=True, editable=False, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='%(class)s_created', to=settings.AUTH_USER_MODEL)),
+                ('playlist', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='recommendations', to='music.playlist')),
+                ('updated_by', models.ForeignKey(blank=True, editable=False, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='%(class)s_updated', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'constraints': [models.UniqueConstraint(condition=models.Q(('is_actual', True)), fields=('is_actual',), name='unique_actual_recommendation_playlist')],
+            },
+        ),
+    ]

music_storage/music/models.py

@@ -79,3 +79,40 @@ class Track(BaseModel):
 
     def __str__(self):
         return f"{self.album.artist} - {self.title}"
+
+
+class Playlist(BaseModel):
+    name = models.CharField(max_length=200)
+    tracks = models.ManyToManyField(Track, related_name="playlists")
+
+    def __str__(self):
+        return f"Playlist: {self.name}"
+
+
+class RecommendationPlaylist(BaseModel):
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(
+                fields=["is_actual"],
+                condition=models.Q(is_actual=True),
+                name="unique_actual_recommendation_playlist",
+            )
+        ]
+
+    name = models.CharField(max_length=200)
+    description = models.TextField(blank=True)
+    playlist = models.ForeignKey(
+        Playlist, on_delete=models.CASCADE, related_name="recommendations"
+    )
+    is_actual = models.BooleanField(default=False)
+
+    def __str__(self):
+        return f"Recommendation Playlist: {self.name}"
+
+    def switch_actual(self):
+        if not self.is_actual:
+            (RecommendationPlaylist.objects
+                .filter(is_actual=True)
+                .update(is_actual=False))
+            self.is_actual = True
+            self.save()