Django 一对一学生表与学号表对应关系建立数据库表

所谓的一对一关系就是数据库里两个数据表的id对应相等的值数据库字段相互联系对应,

删除主表从表数据也对应删除可在从表建立一对一字段，在字段值里添加主表的字符串，“主表名”然后在添加级联删除on_delete=models.CASCADE

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from django.dbimport models

class Student(models.Model):

name = models.CharField(max_length=20,verbose_name='姓名')

age = models.SmallIntegerField(default=0,verbose_name='年龄')

sex = models.SmallIntegerField(default=1,verbose_name='性别')

qq = models.CharField(max_length=20,unique=True,null=True,verbose_name='qq号')

phone = models.CharField(max_length=20,unique=True,null=True,verbose_name='电话号')

c_time = models.DateTimeField(verbose_name='创建时间',auto_now_add=True)

e_time = models.DateTimeField(verbose_name='编辑时间',auto_now=True)

def __str__(self):

return '%s-%s' % (self.name, self.age)

class Meta:

verbose_name ='学生表'

        verbose_name_plural = verbose_name

class StudentDetail(models.Model):

num = models.CharField(max_length=20,default='',verbose_name='学号')

college = models.CharField(max_length=20,default='',verbose_name='大学')

student = models.OneToOneField('Student',on_delete=models.CASCADE,verbose_name='级联删除')#级联删除,删除主表从表数据也将会删除

    class Meta:

verbose_name ='学号表'

        verbose_name_plural = verbose_name