updated the classes/fields with default values

gab_salas_music/homepage/models.py

@@ -4,8 +4,8 @@ from django.db import models
 class Artist(models.Model):
     artist_name = models.CharField(max_length=50)
     monthly_listeners = models.IntegerField()
-    birth_name = models.CharField(max_length=50)
-    bio = models.CharField(max_length=700)
+    birth_name = models.CharField(max_length=50, blank=True)
+    bio = models.CharField(max_length=700, blank=True)
 
 
 class Album(models.Model):
@@ -14,8 +14,8 @@ class Album(models.Model):
                                related_name='album')
     description = models.CharField(max_length=1000)
     release_date = models.CharField(max_length=50)
-    label = models.CharField(max_length=50)
-    song_count = models.IntegerField()
+    label = models.CharField(max_length=50, blank=True)
+    song_count = models.IntegerField(default='0')
 
 
 class Song(models.Model):
@@ -24,5 +24,5 @@ class Song(models.Model):
                                related_name='song')
     album = models.ForeignKey(Album, on_delete=models.CASCADE)
     song_length = models.IntegerField()
-    music_video = models.BooleanField()
-    lyrics = models.CharField(max_length=6500)
+    music_video = models.BooleanField(default=None)
+    lyrics = models.CharField(max_length=6500, blank=True)