django一对多增删改查

实现一对多表查询功能

项目代码：

models.py

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_id1    11    26    11000  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)

urls.py

"""django_one URL ConfigurationThe `urlpatterns` list routes URLs to views. For more information please see:https://docs.djangoproject.com/en/1.10/topics/http/urls/
Examples:
Function views1. Add an import:  from my_app import views2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
Class-based views1. Add an import:  from other_app.views import Home2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
Including another URLconf1. Import the include() function: from django.conf.urls import url, include2. 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 studentsurlpatterns = [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),

]

students.py

from django.shortcuts import render
from django.shortcuts import redirect
from app01 import modelsdef get_students(request):stu_list = models.Student.objects.all()# for i in stu_list:#     print(i.id,i.username,i.age,i.cs.id,i.cs.titile)return render(request,'get_students.html',{'stu_list':stu_list})def add_students(request):if request.method == 'GET':cs_list = models.Classes.objects.all()return render(request, 'add_students.html', {'cs_list': cs_list})elif request.method == 'POST':u = request.POST.get('username')a = request.POST.get('age')g = request.POST.get('gender')c = request.POST.get('cs')models.Student.objects.create(username=u,age=a,gender=g,cs_id=c,)return redirect('/get_students.html')def del_students(request):nid = request.GET.get('nid')models.Student.objects.filter(id=nid).delete()return redirect('get_students.html')def edit_students(request):if request.method == "GET":nid = request.GET.get('nid')obj = models.Student.objects.filter(id=nid).first()cls_list = models.Classes.objects.all()return render(request, 'edit_students.html',{'obj': obj,'cls_list': cls_list})elif request.method == "POST":u = request.GET.get('username')a = request.GET.get('age')g = request.GET.get('gender')c = request.GET.get('cs')models.Student.objects.filter(nid=id).update(username=u,age=a,gender=g,cs_id=c,)return redirect('/get_students.html')

get_students.html

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title>
</head>
<body>
<div><a href="/add_students.html">添加</a>
</div>
<div><table border="1"><thead><tr><th>ID</th><th>姓名</th><th>年龄</th><th>性别</th><th>班级</th><th>操作</th></tr></thead><tbody>{% for row in stu_list %}<tr><td>{{ row.id }}</td><td>{{ row.username }}</td><td>{{ row.age }}</td>{% if row.gender %}<td>男</td>{% else %}<td>女</td>{% endif %}<td>{{ row.cs.titile }}</td><td><a href="/del_students.html?nid={{ row.id }}">删除</a>|<a href="/edit_students.html?nid={{ row.id }}">编辑</a></td></tr>{% endfor %}</tbody></table>
</div>
</body>
</html>

add_students.html

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title>
</head>
<body>
<h3>添加用户</h3>
<form action="/add_students.html" method="POST">{% csrf_token %}<p><input type="text" name="username" placeholder="用户名" /></p><p><input type="text" name="age" placeholder="年龄" /></p><p>男:<input type="radio" name="gender" value="1" />女:<input type="radio" name="gender" value="0" /></p><p><select name="cs">{% for foo in cs_list %}<option value="{{ foo.id }}">{{ foo.titile }}</option>{% endfor %}</select></p><input type="submit" value="提交">
</form>
</body>
</html>

edit_students.html

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title>
</head>
<body>
<form action="/edit_students.html" method="POST">{% csrf_token %}<p><input type="text" name="username" placeholder="用户名" value="{{ obj.username }}"/></p><p><input type="text" name="age" placeholder="年龄" value="{{ obj.age }}"/></p><p>{% if obj.gender %}男:<input type="radio" name="gender" value="1" checked/>女:<input type="radio" name="gender" value="0"/>{% else %}男:<input type="radio" name="gender" value="1"/>女:<input type="radio" name="gender" value="0" checked/>{% endif %}</p><p><select name="cs">{% for foo in cls_list %}{% if obj.cs_id == foo.id %}<option value="{{ foo.id }}" selected>{{ foo.titile }}</option>{% else %}<option value="{{ foo.id }}">{{ foo.titile }}</option>{% endif %}{% endfor %}{</select></p><input type="submit" value="提交">
</form>
</body>
</html>

转载于:https://www.cnblogs.com/nulige/p/6534403.html

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