在booktest中models.py中最加個類 ~~~ # 多類 class HeroInfo(models.Model): '''英雄人物模型類''' hname = models.CharField(max_length=20) # 英雄名稱 # 性別,BooleanField說明是bool類型,default指定默認值,False代表男 hgender = models.BooleanField(default=False) # 備注 hcomment = models.CharField(max_length=128) # 關系屬性 hbook,建立圖書類和英雄人物類之間的一對多關系 hbook = models.ForeignKey('BookInfo', on_delete=models.CASCADE, ) ~~~ 生成遷移文件 ~~~ python manage.py makemigrations ~~~ 生成表 ~~~ python manage.py migrate ~~~ ~~~ >>> from booktest.models import BookInfo,HeroInfo >>> b = BookInfo() >>> b.btitile = '天龍八部' >>> from datetime import date >>> b.bpub_date = date(1990,1,1) >>> b.save() >>> h = HeroInfo() >>> h.hname = '段譽' >>> h.hgender = False >>> h.hcomment = '六脈神劍' >>> h.hbook = b >>> h.save() ~~~ ~~~ >>> h2 = HeroInfo() >>> h2.hname = '喬峰' >>> h2.hcomment = '降龍十八掌' >>> h2.hbook = b >>> h2.save() >>> h3 = HeroInfo.objects.get(id=2) >>> h3.hname '喬峰' >>> h3.hgender False >>> h3.hcomment '降龍十八掌' ~~~ ~~~ >>> h3.hbook <BookInfo: BookInfo object (2)> ~~~ 查詢所有 ~~~ >>> b.heroinfo_set.all() <QuerySet [<HeroInfo: HeroInfo object (1)>, <HeroInfo: HeroInfo object (2)>]> ~~~ 通過bookinfo類對象查詢關系heroinfo信息  查詢所有 ~~~ HeroInfo.objects.all() ~~~ ~~~ BookInfo.objects.all() ~~~