周末没事自己写了个班级管理系统,虽然简单,但也算个前期学习的总结吧
from django.db import models
# Create your models here.
class Banji(models.Model):
grade = models.CharField(max_length=32,unique=True)
class Student(models.Model):
name = models.CharField(max_length=32,unique=True)
banji = models.ForeignKey(to="Banji",on_delete=models.CASCADE)
class Teacher(models.Model):
name = models.CharField(max_length=32,unique=True)
banji = models.ManyToManyField("Banji")"""class_crm URL Configuration
The `urlpatterns` list routes URLs to views. For more information please see:
https://docs.djangoproject.com/en/1.11/topics/http/urls/
Examples:
Function views
1. Add an import: from my_app import views
2. Add a URL to urlpatterns: url(r'^$', views.home, name='home')
Class-based views
1. Add an import: from other_app.views import Home
2. Add a URL to urlpatterns: url(r'^$', Home.as_view(), name='home')
Including another URLconf
1. Import the include() function: from django.conf.urls import url, include
2. Add a URL to urlpatterns: url(r'^blog/', include('blog.urls'))
"""
from django.conf.urls import url
from django.contrib import admin
from app01 import views
urlpatterns = [
url(r'^admin/', admin.site.urls),
# 班级
url(r'^banji_list/', views.banji_list),
url(r'^add_banji/', views.add_banji),
url(r'^del_banji/', views.del_banji),
url(r'^edit_banji/', views.edit_banji),
url(r'^student_list/', views.student_list),
url(r'^add_student/', views.add_student),
url(r'^del_student/', views.del_student),
url(r'^edit_student/', views.edit_student),
url(r'^teacher_list/', views.teacher_list),
url(r'^add_teacher/', views.add_teacher),
url(r'^del_teacher/', views.del_teacher),
url(r'^edit_teacher/', views.edit_teacher),
]from django.shortcuts import render,HttpResponse,redirect
from app01 import models
# Create your views here.
def banji_list(request):
print(111)
banji_list = models.Banji.objects.all().order_by("id")
print(222)
print(banji_list)
return render(request,"banji_list.html",{"banji_list":banji_list})
def add_banji(request):
if request.method == "POST":
name = request.POST.get("new_name")
if not name:
return render(request,"add_banji.html",{"err_name":name,"err_msg":"不能为空"})
add_obj = models.Banji.objects.filter(grade=name)
if add_obj:
return render(request,"add_banji.html",{"err_name":name,"err_msg":"已存在"})
models.Banji.objects.create(grade=name)
return redirect("/banji_list/")
return render(request,"add_banji.html")
def del_banji(request):
del_id = request.GET.get("id")
del_list = models.Banji.objects.filter(id=del_id)
del_list.delete()
return redirect("/banji_list/")
def edit_banji(request):
edit_id = request.GET.get("id")
edit_obj = models.Banji.objects.get(id=edit_id)
if request.method == "POST":
name = request.POST.get("new_name")
if not name:
return render(request, "edit_banji.html", {"edit_obj": edit_obj,"err_msg":"不能为空"})
mod_obj = models.Banji.objects.filter(grade=name)
if mod_obj:
return render(request, "edit_banji.html", {"edit_obj": edit_obj,"err_msg":"重复了"})
if edit_obj and name and not mod_obj:
edit_obj.grade = name
edit_obj.save()
return redirect("/banji_list/")
if edit_obj:
return render(request,"edit_banji.html",{"edit_obj":edit_obj})
return HttpResponse("不存在!!!")
# 学生管理
def student_list(request):
student_list = models.Student.objects.all().order_by("id")
return render(request,"student_list.html",{"student_list":student_list})
def add_student(request):
banji_list = models.Banji.objects.all()
if request.method == "POST":
name = request.POST.get("new_name")
if not name:
return render(request, "add_student.html", {"banji_list": banji_list,"err_name":name,"err_msg":"不能为空"})
add_obj = models.Student.objects.filter(name=name)
if add_obj:
return render(request, "add_student.html", {"banji_list": banji_list,"err_name":name,"err_msg":"此学生已存在"})
banji_id = request.POST.get("banji_id")
models.Student.objects.create(name=name,banji_id=banji_id)
return redirect("/student_list/")
return render(request,"add_student.html",{"banji_list":banji_list})
def del_student(request):
del_id = request.GET.get("id")
del_obj = models.Student.objects.get(id=del_id)
del_obj.delete()
return redirect("/student_list/")
def edit_student(request):
edit_id = request.GET.get("id")
edit_obj = models.Student.objects.filter(id=edit_id)
banji_list = models.Banji.objects.all()
if request.method == "POST":
name = request.POST.get("new_name")
banji_id = request.POST.get("banji_id")
if not name:
return render(request, "edit_student.html", {"edit_obj": edit_obj, "banji_list": banji_list,"err_msg":"不能为空"})
edit_obj = edit_obj[0]
edit_obj.name = name
edit_obj.banji_id = banji_id
edit_obj.save()
return redirect("/student_list/")
return render(request,"edit_student.html",{"edit_obj":edit_obj[0],"banji_list":banji_list})
def teacher_list(request):
teacher_list = models.Teacher.objects.all()
return render(request,"teacher_list.html",{"teacher_list":teacher_list})
def add_teacher(request):
banji_list = models.Banji.objects.all()
if request.method == "POST":
name = request.POST.get("new_name")
add_obj = models.Teacher.objects.filter(name=name)
if add_obj:
return render(request, "add_teacher.html", {"banji_list": banji_list,"err_name":name,"err_msg":"已存在"})
banji_id = request.POST.getlist("banji_id")
new_tea = models.Teacher.objects.create(name=name)
new_tea.banji.set(banji_id)
return redirect("/teacher_list/")
return render(request,"add_teacher.html",{"banji_list":banji_list})
def del_teacher(request):
del_id = request.GET.get("id")
del_obj = models.Teacher.objects.filter(id=del_id)
del_obj.delete()
return redirect("/teacher_list/")
def edit_teacher(request):
edit_id = request.GET.get("id")
edit_obj = models.Teacher.objects.filter(id=edit_id)
banji_list = models.Banji.objects.all()
if request.method == "POST":
name = request.POST.get("new_name")
banji_id = request.POST.getlist("banji_id")
edit_obj = edit_obj[0]
edit_obj.name = name
edit_obj.save()
edit_obj.banji.set(banji_id)
return redirect("/teacher_list/")
return render(request,"edit_teacher.html",{"banji_list":banji_list,"edit_obj":edit_obj[0]})数据库表关系如下:
总结一些方法:
get为获取单个对象,找不到会报错,所以如果用的话最好try一下
filter获取的是query set集合,也可以理解为对象列表
getlist获取所有
HttpResponse('字符串') ——》 页面显示字符串的内容
render(request,'模板的名字',{k1:v1}) ——》 整个HTML文件返回给浏览器
redirect('/index/') 跳转 重定向 响应头 location：/index/
