old_contents: from django.contrib import admin
  from songs.models import Genre, Song
  
  admin.site.register(Genre)
  admin.site.register(Song)
  
new_contents: from django.contrib import admin
  from songs.models import Genre, Song
  
  class SongInline(admin.TabularInline):
  	model = Song
  
  class GenreAdmin(admin.ModelAdmin):
  	inlines = [SongInline]
  
  class SongAdmin(admin.ModelAdmin):
  	list_display = ('title', 'artist', 'year', 'genre', 'up', 'down', 'score')
  
  admin.site.register(Genre, GenreAdmin)
  admin.site.register(Song, SongAdmin)
  
subject: Add contextual data to admin site