Django模型系统——ORM校园管理系统代码

from django.shortcuts import render,reverse,redirect
from app01 import models
# Create your views here.

#-----------------------------------------------班级管理--------------------------------------------------------
def class_list(request):
    class_list = models.Class.objects.all()
    return render(request, "class_list.html", {"class_list": class_list})



def delete_class(request):
    class_id = request.GET.get("class_id")
    models.Class.objects.filter(id=class_id).delete()
    return redirect(reverse("class_list"))



def add_class(request):
    # 前端POST填好的新班级信息
    if request.method == "POST":
        cname = request.POST.get("cname")
        first_day = request.POST.get("first_day")
        # 还可以这么获取提交的数据，但不推荐这么写
        # data = request.POST.dict()
        # del data["csrfmiddlewaretoken"]
        # 创建新数据的两种方式
        # new_class = models.Class(cname=cname, first_day=first_day)
        # new_class.save()
        models.Class.objects.create(cname=cname, first_day=first_day)
        # 跳转到class_list
        return redirect(reverse('class_list'))
    # 返回添加班级的页面
    return render(request, "add_class.html")



def edit_class(request):
    if request.method == "POST":
        class_id = request.POST.get("id")
        cname = request.POST.get("cname")
        first_day = request.POST.get("first_day")
        models.Class.objects.create(id=class_id, cname=cname, first_day=first_day)
        return redirect(reverse("class_list"))
    class_id = request.GET.get("class_id")
    class_obj = models.Class.objects.filter(id=class_id)
    if class_obj:
        class_obj = class_obj[0]
        return render(request, "edit_class.html", {"class": class_obj})
    # 找不到该条记录
    else:
        return redirect(reverse("class_list"))