models -- 一对一关系

• class Author(models.Model):
      name = models.CharField(max_length=30)
  
      def __str__(self):
          return self.name
  
  class AuthorDetail(models.Model):
      sex = models.BooleanField(max_length=1, choices=((0, '男'), (1, '女'),))
      email = models.EmailField()
      address = models.CharField(max_length=50)
      birthday = models.DateField()
      author = models.OneToOneField(Author)
  

   

• class Author(models.Model):
      name = models.CharField(max_length=30)
  
      def __str__(self):
          return self.name
  
  class AuthorDetail(models.Model):
      sex = models.BooleanField(max_length=1, choices=((0, '男'), (1, '女'),))
      email = models.EmailField()
      address = models.CharField(max_length=50)
      birthday = models.DateField()
      author = models.ForeignKey('Author', unique=True)
  

   

• 建立一对一关系的两种实现方式，一种是使用OneToOneField，一种是ForeignKey与unique=True组合