Added filters and search to admin page, also fixed the default values for the homepage models.

homepage/admin.py

@@ -4,5 +4,31 @@ from .models import Song, Album, Artist
 
 class SongAdmin(admin.ModelAdmin):
     model = Song
+    list_display = ('song_title', 'song_length', 'lyrics', 'music_video')
+    fields = ('song_title', 'song_length', 'lyrics', 'music_video',)
+    search_fields = ('song_title', 'lyrics')
+    list_filter = ('song_title',)
+
+class ArtistAdmin(admin.ModelAdmin):
+    model = Artist
+    fields = ('artist_name','birth_name','monthly_listeners', 'bio',)
+    list_display = ('artist_name','birth_name','monthly_listeners')
+    search_fields = ('artist_name','birth_name')
+    list_filter = ('artist_name', 'birth_name')
+
+
+class AlbumAdmin(admin.ModelAdmin):
+    model = Album
+    fields = ('album_name', 
+            'description', 
+            'release_date', 'label', 'song_count')
+    list_display = ('album_name', 
+                    'description', 
+                    'release_date', 'label', 'song_count')
+    search_fields = ('album_name', 'description', 'label',)
+    list_filter = ('album_name',)
+
 
 admin.site.register(Song, SongAdmin)
+admin.site.register(Artist, ArtistAdmin)
+admin.site.register(Album, AlbumAdmin)

homepage/migrations/0001_initial.py

-# Generated by Django 4.1.6 on 2023-02-20 07:06
+# Generated by Django 4.1.6 on 2023-02-20 08:28
 
 from django.db import migrations, models
 import django.db.models.deletion
@@ -39,15 +39,15 @@ class Migration(migrations.Migration):
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('song_title', models.CharField(default='TBA', max_length=50)),
                 ('song_length', models.IntegerField(default=0)),
-                ('music_video', models.BooleanField(default='False')),
+                ('music_video', models.BooleanField(default=False)),
                 ('lyrics', models.TextField(default='TBA')),
-                ('album', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='homepage.album')),
-                ('artist', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='homepage.artist')),
+                ('album', models.ForeignKey(blank=True, default=None, null=True, on_delete=django.db.models.deletion.CASCADE, to='homepage.album')),
+                ('artist', models.ForeignKey(blank=True, default=None, null=True, on_delete=django.db.models.deletion.CASCADE, to='homepage.artist')),
             ],
         ),
         migrations.AddField(
             model_name='album',
             name='artist',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='homepage.artist'),
+            field=models.ForeignKey(blank=True, default=None, null=True, on_delete=django.db.models.deletion.CASCADE, to='homepage.artist'),
         ),
     ]

homepage/migrations/0002_alter_album_label_alter_artist_artist_name_and_more.py

+# Generated by Django 4.1.6 on 2023-02-20 08:48
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('homepage', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='album',
+            name='label',
+            field=models.CharField(default='', max_length=60),
+        ),
+        migrations.AlterField(
+            model_name='artist',
+            name='artist_name',
+            field=models.CharField(default='', max_length=50),
+        ),
+        migrations.AlterField(
+            model_name='artist',
+            name='bio',
+            field=models.CharField(default='', max_length=700),
+        ),
+        migrations.AlterField(
+            model_name='artist',
+            name='birth_name',
+            field=models.CharField(default='', max_length=50),
+        ),
+        migrations.AlterField(
+            model_name='song',
+            name='lyrics',
+            field=models.TextField(default=''),
+        ),
+        migrations.AlterField(
+            model_name='song',
+            name='song_title',
+            field=models.CharField(default='', max_length=50),
+        ),
+    ]

homepage/models.py

@@ -17,24 +17,24 @@ from django.db import models
 #     * album
 #     * song_length
 class Artist(models.Model):
-    artist_name = models.CharField(max_length=50, default="TBA")
-    birth_name = models.CharField(max_length=50, default="TBA")
-    bio = models.CharField(max_length=700, default="TBA")
+    artist_name = models.CharField(max_length=50, default="")
+    birth_name = models.CharField(max_length=50, default="")
+    bio = models.CharField(max_length=700, default="")
     monthly_listeners = models.IntegerField(default=0)
 
 class Album(models.Model):
     album_name = models.CharField(max_length=50)
-    artist = models.ForeignKey(Artist, on_delete=models.CASCADE)
+    artist = models.ForeignKey(Artist, on_delete=models.CASCADE, default=None, null=True, blank=True)
     description = models.CharField(max_length=50)
     release_date = models.DateField()
-    label = models.CharField(max_length=60, default="TBA")
+    label = models.CharField(max_length=60, default="")
     song_count = models.IntegerField(default=0)
 
 class Song(models.Model):
-    song_title = models.CharField(max_length=50, default="TBA")
-    artist  = models.ForeignKey(Artist, on_delete=models.CASCADE)
-    album = models.ForeignKey(Album, on_delete=models.CASCADE)
+    song_title = models.CharField(max_length=50, default="")
+    artist  = models.ForeignKey(Artist, on_delete=models.CASCADE, default=None, null=True, blank=True)
+    album = models.ForeignKey(Album, on_delete=models.CASCADE, default=None, null=True, blank=True)
     song_length = models.IntegerField(default=0)
-    music_video = models.BooleanField(default="False")
-    lyrics = models.TextField(default="TBA")
+    music_video = models.BooleanField(default=False)
+    lyrics = models.TextField(default="")
     
\ No newline at end of file