Django基础(二)

7、Model连表操作

• 指定映射
• 连表条件
• 一对一
• 多对多

  class UserProfile(models.Model):
      user_info = models.OneToOneField('UserInfo')
      username = models.CharField(max_length=64)
      password = models.CharField(max_length=64)
  
      def __unicode__(self):
          return self.username
  
  
  class UserInfo(models.Model):
      user_type_choice = (
          (0, u'普通用户'),
          (1, u'高级用户'),
      )
      user_type = models.IntegerField(choices=user_type_choice)
      name = models.CharField(max_length=32)
      email = models.CharField(max_length=32)
      address = models.CharField(max_length=128)
  
      def __unicode__(self):
          return self.name
  
  
  class UserGroup(models.Model):
  
      caption = models.CharField(max_length=64)
  
      user_info = models.ManyToManyField('UserInfo')
  
      def __unicode__(self):
          return self.caption
  
  
  class Host(models.Model):
      hostname = models.CharField(max_length=64)
      ip = models.GenericIPAddressField()
      user_group = models.ForeignKey('UserGroup')
  
      def __unicode__(self):
          return self.hostname
  
  表结构

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