第15章节-Python3.5-基于ORM实现用户增加删除修改以及查看详细

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  • $ 效果图:

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  • app01\ 目录

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  • views.py:
from django.shortcuts import render,HttpResponse,redirect


def login(request):
    # 判断用户获取数据方式是GET,就返回什么数据
    if request.method == "GET":
        return render(request, 'login.html')
    # 判断用户获取数据方式是POST,就判断用户提交的数据是否正确
    elif request.method == "POST":
        # 数据表中执行 select * from user where username='x' and password='x'
        u = request.POST.get('user')
        p = request.POST.get('pwd')
        obj = models.UserInfo.objects.filter(username=u,password=p).first()
        # print(obj)  obj->None(就是没有这个用户)
        if obj:
            return redirect('/cmdb/index/')
        else:
            return render(request, 'login.html')
    else:
        # PUT,DELETE,HEAD,OPTION...
        return redirect("/index/")


def index(request):
    return render(request, 'index.html')


def user_info(request):
    if request.method == "GET":
        user_list = models.UserInfo.objects.all()
        # print(user_list.query)
        # QuerySet [obj,obj,]

        return render(request, 'user_info.html', {'user_list':user_list})
    elif request.method == 'POST':
        u = request.POST.get('user')
        p = request.POST.get('pwd')
        models.UserInfo.objects.create(username=u,password=p)
        return redirect('/cmdb/user_info/')  # 效果跟下面两个一样(在浏览器添加数据到数据库)
        # user_list = models.UserInfo.objects.all()
        # return render(request,'user_info.html', {'user_list':user_list})


def user_detail(request,nid):
    obj = models.UserInfo.objects.filter(id=nid).first()
    # 取单条数据,如果不存在,直接报错(不推荐)
    # models.UserInfo.objects.get(id=nid)
    return render(request, 'user_detail.html',{'obj':obj})


def user_del(request,nid):
    models.UserInfo.objects.filter(id=nid).delete()
    return redirect('/cmdb/user_info/')


def user_edit(request,nid):
    if request.method == "GET":
        obj = models.UserInfo.objects.filter(id=nid).first()
        return render(request, 'user_edit.html',{'obj':obj})
    elif request.method == "POST":
        nid = request.POST.get('id')
        u = request.POST.get('username')
        p = request.POST.get('password')
        models.UserInfo.objects.filter(id=nid).update(username=u,password=p)
        # 跳转到自己所想的页面(html)
        return redirect("/cmdb/user_info/")


from app01 import models
def orm(request):
    # 创建  操作数据操作表(推荐)*****************
    # models.UserInfo.objects.create(username='root',password='123')

    # 效果同上
    # dic = {'username': 'eric', 'password':'666'}
    # models.UserInfo.objects.create(**dic)

    # 效果(作用)同上
    # obj = models.UserInfo(username='root',password='123')
    # obj.save()

    # 查   ******************
    # result = models.UserInfo.objects.all()
    # filter查找哪一个
    # result = models.UserInfo.objects.filter(username='root')
    # result,QuerySet => Django => []
    # [obj(id,username,password), obj(id,username,password), obj(id,username,password)]
    # for row in result:
    #     print(row.id,row.username,row.password)
    # print(result)

    # 删除*********************all(), filter()
    # models.UserInfo.objects.filter(username="root").delete()

    # 更新**********************update(),all(), filter()
    models.UserInfo.objects.filter(id=3).update(password='889')

    return HttpResponse('orm')


from django.views import View


class Home(View):

    # 调用父类中的dispatch(相当于助理,)
    def dispatch(self, request, *args, **kwargs):
        print('before')
        result = super(Home,self).dispatch(request, *args, **kwargs)
        print('after')
        return result

    def get(self,request):
        print(request.method)
        return render(request, 'home.html')

    def post(self,request):
        print(request.method, 'POST')
        return render(request, 'home.html')
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  • urls.py:
from django.conf.urls import url,include
from django.contrib import admin
from app01 import views


urlpatterns = [
    url(r'^login/', views.login),
    url(r'^index/', views.index),
    url(r'^user_info/', views.user_info),
    url(r'^userdetail-(?P<nid>\d+)/', views.user_detail),
    url(r'^userdel-(?P<nid>\d+)/', views.user_del),
    url(r'^useredit-(?P<nid>\d+)/', views.user_edit),
    url(r'orm/', views.orm),
]
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  • user_edit.html:
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body{
            margin:0;
        }
        .menu{
            display:block;
            padding:5px;
        }
    </style>
</head>
<body>
    <div style="height: 48px;background-color: black;color: white">
        Guido（Python之父，仁慈的独裁者）
    </div>
    <div>
        <div style="position: absolute;top: 48px;bottom: 0;left:0;width:200px;background-color: brown;">
            <a class="menu" href="/cmdb/user_info/">用户管理</a>
            <a class="menu" href="/cmdb/user_group/">用户组管理</a>

        </div>
        <div style="position: absolute;top:48px;left:210px;bottom:0;right:0;overflow: auto">

            <h1>编辑用户</h1>
            <form method="post" action="/cmdb/useredit-{{obj.id}}/">
                <!--id不能改-->
                <input style="display: none" type="text" name="id" value="{{obj.id}}">
                <input type="text" name="username" value="{{obj.username}}">
                <input type="text" name="password" value="{{obj.password}}">
                <input type="submit" value="提交">
            </form>

        </div>
    </div>

</body>
</html>
  • user_info.html:
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body{
            margin:0;
        }
        .menu{
            display:block;
            padding:5px;
        }
    </style>
</head>
<body>
    <div style="height: 48px;background-color: black;color: white">
        Guido（Python之父，仁慈的独裁者）
    </div>
    <div>
        <div style="position: absolute;top: 48px;bottom: 0;left:0;width:200px;background-color: brown;">
            <a class="menu" href="/cmdb/user_info/">用户管理</a>
            <a class="menu" href="/cmdb/user_group/">用户组管理</a>

        </div>
        <div style="position: absolute;top:48px;left:210px;bottom:0;right:0;overflow: auto">

            <h3>添加用户</h3>
            <form method="POST" action="/cmdb/user_info/">
                <input type="text" name="user">
                <input type="text" name="pwd">
                <input type="submit" value="添加">
            </form>

            <h3>用户列表</h3>
            <ul>
                {% for row in user_list %}
                    <li>
                        <a href="/cmdb/userdetail-{{ row.id }}/">{{row.username}}</a> |
                        <a href="/cmdb/userdel-{{ row.id }}/">删除</a> |
                        <a href="/cmdb/useredit-{{ row.id }}/">编辑</a> |
                    </li>
                {% endfor %}
            </ul>


        </div>
    </div>

</body>
</html>
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