排课表软件在青岛的开发与框架实现

from django.db import models

class Course(models.Model):

name = models.CharField(max_length=100)

teacher = models.ForeignKey('Teacher', on_delete=models.CASCADE)

classroom = models.ForeignKey('Classroom', on_delete=models.CASCADE)

time = models.DateTimeField()

class Teacher(models.Model):

name = models.CharField(max_length=100)

class Classroom(models.Model):

name = models.CharField(max_length=100)

def save(self, *args, **kwargs):

if Course.objects.filter(time=self.time, classroom=self.classroom).exists():

raise Exception("该时间段和教室已被占用")

super().save(*args, **kwargs)