Django 外键的使用方法详解

 　　 dynamic_id = models.AutoField('serial_num', primary_key=True)
   song = models.ForeignKey(Song, on_delete=models.CASCADE, verbose_name='song name')
   dynamic_plays = models.IntegerField('plays_num')
   dynamic_search = models.IntegerField('search_num')
   dynamic_down = models.IntegerField('down_num')

# hot search songs
  search_song = Dynamic.objects.select_related('song').order_by('dynamic_search').all()[:8]
  # sort songs
  label_list = Label.objects.all()
  # hot songs
  play_hot_song = Dynamic.objects.select_related('song').order_by('dynamic_plays').all()[:10]
  # recommend songs
  daily_recommendation = Song.objects.order_by('song_release').all()[:3]
  # hot search and download
  search_ranking = search_song[:6]
  down_ranking = Dynamic.objects.select_related('song').order_by('dynamic_down').all()[:6]
  all_ranking = [search_ranking, down_ranking]
  return render(request, 'index/test.html', locals())

<img src="/UploadFiles/2021-04-08/logo.png' %}">

在.html文件中我们使用了在views.py中的对象来引用了song当中的信息，play_hot_song是在views.py中的字段名，进行遍历的是play_hot.song.song_name，play_hot是遍历的参数，song是接口的字段名，song_name是外接对象的内容，这样就可以将信息映射到网站中。
三、结果

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