django 多对多 增 删 改 查
一、通过url方式实现多对多的:增加,删除,编辑
代码目录:
urls.py
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"""django_one URL Configuration The `urlpatterns` list routes URLs to views. For more information please see: https://docs.djangoproject.com/en/1.10/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.views import classes from app01.views import students from app01.views import teachers urlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^get_classes.html$', classes.get_classes), url(r'^add_classes.html$', classes.add_classes), url(r'^del_classes.html$', classes.del_classes), url(r'^edit_classes.html$', classes.edit_classes), url(r'^get_students.html$', students.get_students), url(r'^add_students.html$', students.add_students), url(r'^del_students.html$', students.del_students), url(r'^edit_students.html$', students.edit_students), url(r'^get_teachers.html$', teachers.get_teachers), url(r'^add_teachers.html$', teachers.add_teachers), url(r'^del_teachers.html$', teachers.del_teachers), url(r'^edit_teachers.html$', teachers.edit_teachers), ] |
models.py
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from django.db import models # Create your models here. class Classes(models.Model): """ 班级表,男 """ titile = models.CharField(max_length=32) m = models.ManyToManyField("Teachers") class Teachers(models.Model): """ 老师表,女 """ name = models.CharField (max_length=32) """ cid_id tid_id 1 1 1 2 6 1 1000 1000 """ # class C2T(models.Model): # cid = models.ForeignKey(Classes) # tid = models.ForeignKey(Teachers) class Student(models.Model): username = models.CharField(max_length=32) age = models.IntegerField() gender = models.BooleanField() cs = models.ForeignKey(Classes) |
teachers.py
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from django.shortcuts import render from django.shortcuts import redirect from app01 import models def get_teachers(request): cls_list = models.Classes.objects.all() return render(request,'get_teachers.html',{'cls_list':cls_list}) def add_teachers(request): if request.method == "GET": teachers_list = models.Teachers.objects.all() return render(request, 'add_teachers.html',{'teachers_list':teachers_list}) elif request.method == "POST": nid = request.POST.get('titile') # [1,2,3,4,] teachers_id = request.POST.getlist('teachers_id') # 10 obj = models.Classes.objects.create(titile = nid) # 10 1 # 10 2 # 10 3 # 10 4 obj.m.add(*teachers_id) return redirect('get_teachers.html') def del_teachers(request): nid = request.GET.get('nid') models.Classes.objects.filter(id=nid).delete() return redirect('get_teachers.html') def edit_teachers(request): if request.method == "GET": nid = request.GET.get('nid') obj = models.Classes.objects.filter(id=nid).first() teachers_list = models.Teachers.objects.all() return render(request,'edit_teachers.html',{'nid':nid,'obj':obj,'teachers_list':teachers_list}) elif request.method == "POST": n = request.POST.get('nid') t = request.POST.get('titile') teachers_id = request.POST.getlist('teachers_id') obj = models.Classes.objects.filter(id=n).update( id=n, titile=t, ) obj.m.add(*teachers_id) return redirect('get_teachers.html') |
添加功能
get_teachers.html
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<! DOCTYPE html> < html lang="en"> < head > < meta charset="UTF-8"> < title >Title</ title > </ head > < body > < div > < a href="/add_teachers.html">添加</ a > </ div > < div > < table border="1"> < thead > < tr > < th >ID</ th > < th >班级</ th > < th >分配老师</ th > < th >操作</ th > </ tr > </ thead > < tbody > {% for row in cls_list %} < tr > < td >{{ row.id }}</ td > < td >{{ row.titile }}</ td > < td > {% for cls in row.m.all %} {{ cls.name }} {% endfor %} </ td > < td > < a href="/del_teachers.html?nid={{ row.id }}">删除</ a > | < a href="/edit_teachers.html?nid={{ row.id }}">编辑</ a > </ td > </ tr > {% endfor %} </ tbody > </ table > </ div > </ body > </ html > |
添加功能
add_teachers.html
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<! DOCTYPE html> < html lang="en"> < head > < meta charset="UTF-8"> < title >Title</ title > </ head > < body > < form action="add_teachers.html" method="POST"> {% csrf_token %} < p >< input type="text" name="titile" placeholder="班级" /></ p > < p > < select name="teachers_id" multiple="multiple" > {% for teachers in teachers_list %} < option value="{{ teachers.id}}">{{ teachers.name }}</ option > {% endfor %} </ select > </ p > < input type="submit" value="提交" /> </ form > </ body > </ html > |
编辑功能
edit_teachers.html
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<! DOCTYPE html> < html lang="en"> < head > < meta charset="UTF-8"> < title >Title</ title > </ head > < body > < form action="/edit_teachers.html?nid={{ nid }}" method="POST"> {% csrf_token %} < p >< input type="text" name="titile" placeholder="班级" value="{{ obj.titile }}"/></ p > < p > < select name="teachers_id" multiple="multiple" > {% for teachers in teachers_list %} < option value="{{ teachers.id}}">{{ teachers.name }}</ option > {% endfor %} </ select > </ p > < input type="submit" value="提交"> </ form > </ body > </ html > |
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