Django模型系统——ORM校园管理系统代码

 

1.models.py

from django.db import models

# Create your models here.

class Class(models.Model):
    id = models.AutoField(primary_key=True)  # 主键
    cname = models.CharField(max_length=32)  # 班级名称
    first_day = models.DateField()  # 开班时间

class Student(models.Model):
    id = models.AutoField(primary_key=True)
    sname = models.CharField(max_length=32)
    cid = models.ForeignKey("Class")
    detail = models.OneToOneField(to="StudentInfo", null=True)

class StudentInfo(models.Model):
    height = models.CharField(max_length=4)
    weight = models.CharField(max_length=4)
    addr = models.CharField(max_length=32,null=True)


class Teacher(models.Model):
    tname = models.CharField(max_length=32)
    # cid = models.ManyToManyField(to="Class", related_name="teachers")
    cid = models.ManyToManyField(to="Class")

模型系统