created models for data elements

nishaespera_music/homepage/models.py

 from django.db import models
 
 # Create your models here.
+class Artist(models.Model):
+    artist_name = models.CharField(max_length = 50)
+    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)
+    description = models.CharField(max_length = 100)
+    release_date = models.DateTimeField("date released")
+
+class Song(models.Model):
+    song_title = models.CharField(max_length = 50)
+    artist = models.ForeignKey(Artist, on_delete = models.CASCADE)
+    album = models.ForeignKey(Album, on_delete = models.CASCADE)
+    song_length = models.IntegerField(default=0)
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