Django--网页管理实例解析

此篇为代码流程的注释以及自己写的小项目的思路：

首先是项目的路由配置：

 1 urlpatterns = [
 2     # url(r'^admin/', admin.site.urls),
 3     url(r'^yemian/',yemian),
 4     url(r'^zuoye/',zuoye),
 5     url(r'^class/',views.class_list),
 6     url(r'^class_add/',views.class_add),
 7     url(r'^class_delete/',views.class_delete),
 8     url(r'^class_edit/',views.class_edit),
 9     url(r'^teacher/',tvi.teacher),
10     url(r'^tadd/',tvi.t_add),
11     url(r'^tedit/',tvi.t_edit),
12     url(r'^tdelete/',tvi.t_delete),
13     url(r'^student/',svi.student),
14     url(r'^sadd/',svi.s_add),
15     url(r'^sedit/',svi.s_edit),
16     url(r'^sdelete/',svi.s_delete),
17     url(r'^modal_add_student/', svi.modal_add_student),
18     url(r'^modal_add_teacher/', tvi.modal_add_teacher),
19 
20     url(r'^modal_add_class/', modal_add_class),
21 
22     url(r'^edit_modal_class/', views.edit_modal_add_class),
23     url(r'^modal_edit_student/', svi.modal_edit_student),
24 
25     url(r'^modal_delete_student/', svi.modal_delete_student),
26 
27     url(r'^modal_edit_teacher/', tvi.modal_edit_teacher),
28     url(r'^modal_delete_teacher/', tvi.modal_delete_teacher),
29 
30 ]

项目路由

路由的配置很重要，关乎于前端与后端的交互通道，路由的前面用正则匹配页面信息GET后的地址，然后进行后端函数的调用

<!DOCTYPE html>
<html lang="zh-CN">
<head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no"><link rel="stylesheet" href="/static/dist/css/bootstrap.css"><script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.js "></script><script src="/static/dist/js/bootstrap.js"></script><title>Title</title><style>body {background-color: black;}.ya {background-color: white;/*border-radius: 2%;*/width: 450px;height: 250px;margin-top: 200px;margin-left: 30%;;position: fixed;}.btn-inf {color: white;background-color: black;border: black;}.btn-inf:active{color: white !important;background-color: #222222 !important;border:  black !important;}.btn-inf:link {color: white;background-color: black;border: black;}.btn-inf:hover {color: white;background-color: #333333;}.glyphicon {margin-right: 10px;}.yu{background-color:black ;color:white ;}.nuo{margin-top: 40px;margin-left:10px ;}.btn-sc{color: black;background-color: white;border: white;/*width: 300px;*//*height: 100px;*//*font-size: 50px;*/padding: 10px;position: fixed;top:40%;left: 40%;}.btn-sc:hover{color:white ;background-color: #5e5e5e;border: white;}.btn-lg{padding: 20px 32px;font-size: 36px;line-height: 2;border-radius: 12px;}</style>
</head>
<body>
<div class="container ya img-rounded hidden"><form class="form-horizontal nuo novalidate" action="/zuoye/" method="post"><div class="form-group" id="in1"><label for="inputEmail3" class="col-sm-2 control-label">用户名</label><div class="input-group col-sm-8"><span class="glyphicon glyphicon-user input-group-addon yu"></span><input type="text" class="form-control" id="inputEmail3" placeholder="用户名"aria-describedby="inputEmail3" name="username"><span class="glyphicon glyphicon-ok form-control-feedback hidden"  id="namer"></span><span class="glyphicon glyphicon-warning-sign form-control-feedback hidden"id="namew"></span><span class="glyphicon glyphicon-remove form-control-feedback hidden"  id="namec"></span></div></div><div class="form-group" id="in2"><label for="inputPassword3" class="col-sm-2 control-label">密码</label><div class="input-group col-sm-8"><span class="glyphicon glyphicon-lock input-group-addon yu"></span><input type="password" class="form-control" id="inputPassword3" placeholder="密码" name="password"><span class="glyphicon glyphicon-ok form-control-feedback hidden"  id="pwdr"></span><span class="glyphicon glyphicon-warning-sign form-control-feedback hidden"id="pwdw"></span><span class="glyphicon glyphicon-remove form-control-feedback hidden" id="pwdc"></span></div></div><div class="form-group"><div class="col-sm-offset-2 col-sm-8"><input type="submit" class="btn btn-inf btn-block" id="bu" value="登录"></div></div><div><h3 style="text-align: center">{{ error_msg }}</h3></div></form>
</div>
<div class="tubiao"><a href="javascript:void(0)" class="glyphicon glyphicon-tasks btn btn-sc btn-lg"> Login</a></div><script>
$("#inputEmail3").on("blur",function () {zhi=$("#inputEmail3").val();if (zhi.length==0){$("#namew").removeClass("hidden");$("#in1").addClass("has-warning")}if (zhi.length>15||(zhi.length<6&&zhi.length!=0)){$("#namec").removeClass("hidden");$("#in1").addClass("has-error")}if(zhi.length>=6&&zhi.length<15){$("#namer").removeClass("hidden");$("#in1").addClass("has-success")}});
$("#inputEmail3").on("focus",function () {$("#in1").removeClass("has-error");$("#in1").removeClass("has-success");$("#in1").removeClass("has-warning");$("#namew").addClass("hidden");$("#namec").addClass("hidden");$("#namer").addClass("hidden");
});$("#inputPassword3").on("blur",function () {pwd=$("#inputPassword3").val();if (pwd.length==0){$("#pwdw").removeClass("hidden");$("#in2").addClass("has-warning")}if (pwd.length>15||(pwd.length<6&&pwd.length!=0)){$("#pwdc").removeClass("hidden");$("#in2").addClass("has-error")}if(pwd.length>=6&&pwd.length<15) {$("#pwdr").removeClass("hidden");$("#in2").addClass("has-success")}});$("#inputPassword3").on("focus",function () {$("#in2").removeClass("has-error");$("#in2").removeClass("has-success");$("#in2").removeClass("has-warning");$("#pwdw").addClass("hidden");$("#pwdc").addClass("hidden");$("#pwdr").addClass("hidden");
});$(".btn-sc").on("click",function () {$(".btn-sc").addClass("hidden");$(".ya").removeClass("hidden");})
</script>
</body>
</html>

登录页面的html

登录页面的代码较简单，通过form表单的提交，将账号密码提交到后端进行判断，判断正确跳转网页，判断失败就提升错误信息，下面是相关的函数代码：

 1 def zuoye(request):
 2     global i
 3     i=i+1
 4     if request.method == "GET":
 5         return render(request, "zuoye.html")
 6     else:
 7         if request.POST.get("username") == "gaoshengyue" and request.POST.get("password") == "gsy121994":
 8             # 登陆成功
 9             return redirect("/class/")
10         else:
11             if i>2:
12              return render(request, "zuoye.html", {"error_msg": "输入错误"})
13             else:
14                 return render(request, "zuoye.html")

登录跳转后端py

函数中先进行判断，如果是get请求就开始用render渲染页面，render第一个是传的参数request，第二个是要渲染的页面，第三个是要返回给页面的值，也就是我们模板语言要通过

{{}}来取到的值，用字典的形式传。

用.POST.get来取值，传值的时候表单中的input有name所以字典的key就是这些name，对应的值就是传的值，然后进行判断，登录成功的话跳转到主页面class_list，用redirect来跳转

主页面class_listhtm代码如下：

  1 <!DOCTYPE html>
  2 <html lang="zh-CN"><head>
  3 <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  4     <meta charset="utf-8">
  5     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6     <meta name="viewport" content="width=device-width, initial-scale=1">
  7   <link rel="stylesheet" href="/static/dist/css/bootstrap.css">
  8     <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
  9     <meta name="description" content="">
 10     <meta name="author" content="">
 11     <link rel="icon" href="http://v3.bootcss.com/favicon.ico">
 12     <title>Dashboard Template for Bootstrap</title>
 13 
 14     <!-- Bootstrap core CSS -->
 15     <link href="/static/Dashboard%20Temp_files/bootstrap.css" rel="stylesheet">
 16 
 17     <!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
 18     <link href="/static/Dashboard%20Temp_files/ie10-viewport-bug-workaround.css" rel="stylesheet">
 19 
 20     <!-- Custom styles for this template -->
 21     <link href="/static/Dashboard%20Temp_files/dashboard.css" rel="stylesheet">
 22 
 23     <!-- Just for debugging purposes. Don't actually copy these 2 lines! -->
 24     <!--[if lt IE 9]><script src="../../assets/js/ie8-responsive-file-warning.js"></script><![endif]-->
 25     <script src="/static/Dashboard%20Temp_files/ie-emulation-modes-warning.js"></script>
 26 
 27     <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
 28     <!--[if lt IE 9]>
 29       <script src="https://cdn.bootcss.com/html5shiv/3.7.3/html5shiv.min.js"></script>
 30       <script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script>
 31     <![endif]-->
 32   </head>
 33 <style>
 34   .col-centered {
 35                   float: none;
 36                   margin: 0 auto;
 37                 }
 38   .cd{
 39     background-color: black;
 40   }
 41 </style>
 42   <body>
 43 
 44     <nav class="navbar navbar-inverse navbar-fixed-top">
 45       <div class="container-fluid">
 46         <div class="navbar-header">
 47           <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
 48             <span class="sr-only">Toggle navigation</span>
 49             <span class="icon-bar"></span>
 50             <span class="icon-bar"></span>
 51             <span class="icon-bar"></span>
 52           </button>
 53           <a class="navbar-brand" href="#">Project name</a>
 54         </div>
 55         <div id="navbar" class="navbar-collapse collapse">
 56           <ul class="nav navbar-nav navbar-right">
 57             <li><a href="#">Dashboard</a></li>
 58             <li><a href="#">Settings</a></li>
 59             <li><a href="#">Profile</a></li>
 60             <li><a href="#">Help</a></li>
 61           </ul>
 62           <form class="navbar-form navbar-right">
 63             <input class="form-control" placeholder="Search..." type="text">
 64           </form>
 65         </div>
 66       </div>
 67     </nav>
 68 
 69     <div class="container-fluid">
 70       <div class="row">
 71         <div class="col-sm-3 col-md-2 sidebar">
 72 
 73           <div class="panel-group" id="accordion" role="tablist" aria-multiselectable="true">
 74   <div class="panel panel-default">
 75     <div class="panel-heading  cd" role="tab" id="headingOne">
 76       <h4 class="panel-title">
 77         <a data-toggle="collapse"  href="/class/" id="classfl">
 78           班级
 79         </a>
 80       </h4>
 81     </div>
 82   </div>
 83   <div class="panel panel-default">
 84     <div class="panel-heading" role="tab" id="headingTwo">
 85       <h4 class="panel-title">
 86         <a class="collapsed"   href="/teacher/" >
 87           教师
 88         </a>
 89       </h4>
 90     </div>
 91   </div>
 92   <div class="panel panel-default">
 93     <div class="panel-heading" role="tab" id="headingThree">
 94       <h4 class="panel-title">
 95         <a class="collapsed"  href="/student/"  aria-controls="collapseThree">
 96           学生
 97         </a>
 98       </h4>
 99     </div>
100   </div>
101 </div>
102 
103         </div>
104         <div class="col-sm-9 col-sm-offset-3 col-md-10 col-md-offset-2 main">
105 
106 
107           <div class="panel panel-default">
108   <div class="panel-heading">Panel heading</div>
109   <div class="panel-body">
110     <div class="row">
111     <form class="navbar-form navbar-left col-sm-12" role="search">
112   <div class="form-group">
113     <input type="text" class="form-control" placeholder="搜索">
114   </div>
115   <button type="submit" class="btn btn-info">搜索</button>
116 
117 </form>
118         <a href="/class_add/" class="btn btn-success pull-right" style="margin-right: 15px;margin-top:8px ">网页添加</a>
119 <button type="submit" class="btn btn-success pull-right" style="margin-right: 15px;margin-top:8px " data-toggle="modal" data-target="#myModal">添加</button>
120       </div>
121     <div class="modal fade j" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
122   <div class="modal-dialog j" role="document">
123     <div class="modal-content j">
124       <div class="modal-header">
125         <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
126         <h4 class="modal-title" id="myModalLabel">信息填写</h4>
127       </div>
128       <div class="modal-body">
129           <form method="post">
130         <div class="form-group">
131     <label for="d1">姓名</label>
132     <input type="text" class="hui form-control" id="d1">
133             <span id="error-msg"></span>
134 <div class="modal-footer">
135     <button class="an btn btn-default" data-dismiss="modal" >Close</button>
136     <button id="modal-submitt" class="anq btn btn-primary" type="button" >提交</button>
137       </div>
138         </div>
139               </form>
140       </div>
141 
142     </div>
143   </div>
144 </div>
145 
146 
147 {#  <edit_modal>#}
148     <div class="modal fade j" id="edit_myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
149   <div class="modal-dialog j" role="document">
150     <div class="modal-content j">
151       <div class="modal-header">
152         <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
153         <h4 class="modal-title" id="myModalLabel">信息填写</h4>
154       </div>
155       <div class="modal-body">
156           <form>
157 
158         <div class="form-group">
159             <input  type="text" style="display: none" id="ed2">
160     <label for="ed1">班级名</label>
161     <input type="text" class="hui form-control" id="ed1">
162             <span id="edit_error-msg"></span>
163 <div class="modal-footer">
164     <button class="an btn btn-default" data-dismiss="modal" >Close</button>
165     <button id="edit_modal-submitt" class="anq btn btn-primary" type="button" >提交</button>
166       </div>
167         </div>
168               </form>
169       </div>
170 
171     </div>
172   </div>
173 </div>
174 {#  </edit_modal>#}
175      <div class="table-responsive">
176             <table class="table table-striped table-bordered">
177               <thead>
178                 <tr>
179                   <th class="col-sm-1">#</th>
180                   <th>班级名</th>
181                   <th>操作</th>
182                 </tr>
183               </thead>
184               <tbody>
185               {% for class in class_list %}
186                 <tr>
187                   <td class="col-sm-1">{{ class.cid}}</td>
188                   <td>{{ class.cname }}</td>
189                   <td class="col-sm-6 ">
190                       <a href="/class_delete/?class_id={{ class.cid }}" class="del btn btn-danger col-sm-offset-3 glyphicon glyphicon-remove">删除</a>
191                             <a href="/class_edit/?class_id={{ class.cid }}" class="w btn btn-success glyphicon glyphicon-pencil">编辑</a>
192                   <button class="wm btn btn-success glyphicon glyphicon-pencil">modal编辑</button>
193                   </td>
194 
195                 </tr>
196                 {% endfor %}
197               </tbody>
198             </table>
199           </div>
200 
201 
202     <nav aria-label="Page navigation" class=" pull-right">
203   <ul class="pagination">
204     <li>
205       <a href="#" aria-label="Previous">
206         <span aria-hidden="true">&laquo;</span>
207       </a>
208     </li>
209     <li><a href="#">1</a></li>
210     <li><a href="#">2</a></li>
211     <li><a href="#">3</a></li>
212     <li><a href="#">4</a></li>
213     <li><a href="#">5</a></li>
214     <li>
215       <a href="#" aria-label="Next">
216         <span aria-hidden="true">&raquo;</span>
217       </a>
218     </li>
219   </ul>
220 </nav>
221         </div>
222       </div>
223     </div>
224   </div>
225     </div>
226 
227 
228     <!-- Bootstrap core JavaScript
229     ================================================== -->
230     <!-- Placed at the end of the document so the pages load faster -->
231     <script src="/static/Dashboard%20Temp_files/jquery.js"></script>
232     <script>window.jQuery || document.write('<script src="../../assets/js/vendor/jquery.min.js"><\/script>')</script>
233     <script src="/static/Dashboard%20Temp_files/bootstrap.js"></script>
234     <!-- Just to make our placeholder images work. Don't actually copy the next line! -->
235     <script src="/static/Dashboard%20Temp_files/holder.js"></script>
236     <!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
237     <script src="/static/Dashboard%20Temp_files/ie10-viewport-bug-workaround.js"></script>
238 
239 <script>
240 
241 
242       $("#modal-submitt").on("click", function () {
243 {#        $("#myModal form").submit();#}
244             var className = $("#d1").val();
245             console.log(className);
246 {#          用AJAX不刷新页面提交到后端#}
247           $.ajax({
248               url: "/modal_add_class/",
249               type: "post",
250               data: {"classname": className},
251               success: function (data) {
252                   if (data === "OK"){
253 {#                                        if (data.length != 0) {#}
254 {#                      var clasData = JSON.parse(data);#}
255 {#                      var newTr = document.createElement("tr");#}
256 {#                      $(newTr).append("<td>" + clasData["id"] + "</td>");#}
257 {#                      $(newTr).append("<td>" + clasData["name"] + "</td>");#}
258 {#                      $("td:last").clone().appendTo($(newTr));#}
259 {#                      $(newTr).appendTo("tbody");#}
260                       location.href="/class/";
261                   }else {
262                       $("#error-msg").text(data).parent().parent().addClass("has-error");
263                   }
264               }
265           })
266       });
267 
268        $(".wm").on("click", function () {
269            $tdz=$(this).parent().parent().children();
270            ce_id=$($tdz[0]).text();
271            ce_name=$($tdz[1]).text();
272         $("#edit_myModal").modal("show");
273          $("#ed2").val(ce_id);
274          $("#ed1").val(ce_name);
275 {#           .find("#ed1").val(ce_name)#}
276       });
277        $("#edit_modal-submitt").on("click",function () {
278            var class_d=$("#ed2").val();
279            var class_n=$("#ed1").val();
280            $.ajax({
281                url:"/edit_modal_class/",
282                type:"post",
283                data:{"class_d":class_d,"class_n":class_n},
284                success:function (data) {
285                 if (data==='OK'){
286                     location.reload()
287                 }
288                 else {
289                     $("#edit_error-msg").text(data).parent().parent().addClass("has-error");
290                 }
291                }
292            })
293        })
294 
295 </script>
296 </body></html>

主页面班级管理html

主页面的渲染上，内容展示的部分，用到了模板语言，循环将后端从数据库拿出来的数据进行展示，同时添加的话通过给添加按钮绑定时间，触发模态框，然后再给modal的sumbit按钮绑定获取值并且提交给后端的事件，通过ajax来向后端发送数据。

这里要详细说一下ajax部分：

$.ajax({
url: "/modal_add_class/",             //这里是跳转的url，通过后端路由，调用modal添加数据的函数
type: "post",    //传送给后端的命令属性
data: {"classname": className},          //ajax传给后端的值，字典形式，不能穿列表如果要列表的话要先json.stringify来转换成字符串，后端再通过json.loads来转换
success: function (data) {
if (data === "OK"){                                                     //data为后端return会前端的值，后端一般会使用HttpResponse来返回，也可以是字典。

location.href="/class/";                                            //跳转的页面也可以location.reload()来直接跳转回本页面
}else {
$("#error-msg").text(data).parent().parent().addClass("has-error"); //这里是添加错误信息，has-error是bootstrap中错误信息的样式
}
}
})

取值的话还是在主页面通过jQuery选择器来取值，下面贴的是后端再班级管理页面的代码：

 1 def student(request):
 2 
 3    conn=pymysql.connect(
 4        host='127.0.0.1',port=3306,
 5        user='root',password='',db='day66',charset='utf8'
 6 
 7    )
 8    cursor=conn.cursor(cursor=pymysql.cursors.DictCursor)
 9    cursor.execute("select student.id,student.sname,class.cname,student.class_id from student INNER JOIN  class on student.class_id = class.cid")
10    student_list=cursor.fetchall()
11    cursor.execute("select cid,cname from class")
12    cs_list = cursor.fetchall()
13    cursor.close()
14    conn.close()
15    return  render(request,'student.html',{'student_list':student_list,"cs_list":cs_list})

主页面渲染

通过连接数据库，然后通过sql语句来获取数据库中的班级信息值，然后传给前端，前端再通过模板语言来进行展示

 1 def modal_add_class(request):
 2     print(request.method)
 3     if request.method == "POST":
 4         print()
 5         new_class_name = request.POST.get("classname")
 6         if new_class_name:
 7             conn = pymysql.connect(
 8                 host='127.0.0.1', port=3306,
 9                 user='root', password='', db='day66', charset='utf8'
10             )
11             cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
12             cursor.execute("insert into class(cname) VALUES (%s)", [new_class_name,])
13             conn.commit()
14             cursor.close()
15             conn.close()
16             return HttpResponse("OK")
17         else:
18             error = "班级名称不能为空"
19             return HttpResponse(error)

主页面添加班级信息

这部分函数通过ajax传过来的值，用.POST.get（字典的ey）的方式获取，然后用sql语句insert into后端的数据库中，然后返回前端OK，前端判断接受回的消息是OK，就刷新页面，这样主页面再次回到渲染函数，渲染出来的就是包括新添加数据的页面了。

接下来是班级信息的编辑：

 1 def edit_modal_add_class(request):
 2     if request.method == "POST":
 3         new_class_d = request.POST.get("class_d")
 4         new_class_n = request.POST.get("class_n")
 5         if new_class_n:
 6             conn = pymysql.connect(
 7                 host='127.0.0.1', port=3306,
 8                 user='root', password='', db='day66', charset='utf8'
 9             )
10             cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
11             cursor.execute("update class set cname=%s where cid=%s ", [new_class_n,new_class_d ])
12             conn.commit()
13             cursor.close()
14             conn.close()
15             return HttpResponse("OK")
16         else:
17             error = "班级名称不能为空"
18             return HttpResponse(error)

主页面编辑班级信息

这部分函数，同样是接受ajax传来的值，然后用sql语句的update来进行数据的更新

下面是学生信息部分的添加、编辑、与删除。

  1 <!DOCTYPE html>
  2 <html lang="zh-CN"><head>
  3 <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  4     <meta charset="utf-8">
  5     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6     <meta name="viewport" content="width=device-width, initial-scale=1">
  7   <link rel="stylesheet" href="/static/dist/css/bootstrap.css">
  8     <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
  9     <meta name="description" content="">
 10     <meta name="author" content="">
 11     <link rel="icon" href="http://v3.bootcss.com/favicon.ico">
 12     <title>Dashboard Template for Bootstrap</title>
 13 
 14     <!-- Bootstrap core CSS -->
 15     <link href="/static/Dashboard%20Temp_files/bootstrap.css" rel="stylesheet">
 16 
 17     <!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
 18     <link href="/static/Dashboard%20Temp_files/ie10-viewport-bug-workaround.css" rel="stylesheet">
 19      <link href="/static/sweetalert/sweetalert.css" rel="stylesheet">
 20 
 21     <!-- Custom styles for this template -->
 22     <link href="/static/Dashboard%20Temp_files/dashboard.css" rel="stylesheet">
 23 
 24     <!-- Just for debugging purposes. Don't actually copy these 2 lines! -->
 25     <!--[if lt IE 9]><script src="../../assets/js/ie8-responsive-file-warning.js"></script><![endif]-->
 26     <script src="/static/Dashboard%20Temp_files/ie-emulation-modes-warning.js"></script>
 27 
 28     <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
 29     <!--[if lt IE 9]>
 30       <script src="https://cdn.bootcss.com/html5shiv/3.7.3/html5shiv.min.js"></script>
 31       <script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script>
 32     <![endif]-->
 33   </head>
 34 <style>
 35   .col-centered {
 36                   float: none;
 37                   margin: 0 auto;
 38                 }
 39   .cd{
 40     background-color: black;
 41   }
 42 </style>
 43   <body>
 44 
 45     <nav class="navbar navbar-inverse navbar-fixed-top">
 46       <div class="container-fluid">
 47         <div class="navbar-header">
 48           <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
 49             <span class="sr-only">Toggle navigation</span>
 50             <span class="icon-bar"></span>
 51             <span class="icon-bar"></span>
 52             <span class="icon-bar"></span>
 53           </button>
 54           <a class="navbar-brand" href="#">Project name</a>
 55         </div>
 56         <div id="navbar" class="navbar-collapse collapse">
 57           <ul class="nav navbar-nav navbar-right">
 58             <li><a href="#">Dashboard</a></li>
 59             <li><a href="#">Settings</a></li>
 60             <li><a href="#">Profile</a></li>
 61             <li><a href="#">Help</a></li>
 62           </ul>
 63           <form class="navbar-form navbar-right">
 64             <input class="form-control" placeholder="Search..." type="text">
 65           </form>
 66         </div>
 67       </div>
 68     </nav>
 69 
 70     <div class="container-fluid">
 71       <div class="row">
 72         <div class="col-sm-3 col-md-2 sidebar">
 73 
 74           <div class="panel-group" id="accordion" role="tablist" aria-multiselectable="true">
 75   <div class="panel panel-default">
 76     <div class="panel-heading  cd" role="tab" id="headingOne">
 77       <h4 class="panel-title">
 78         <a  href="/class/" id="classfl">
 79           班级
 80         </a>
 81       </h4>
 82     </div>
 83   </div>
 84   <div class="panel panel-default">
 85     <div class="panel-heading" role="tab" id="headingTwo">
 86       <h4 class="panel-title">
 87         <a class="collapsed"  href="/teacher/" aria-controls="collapseTwo">
 88           教师
 89         </a>
 90       </h4>
 91     </div>
 92   </div>
 93   <div class="panel panel-default">
 94     <div class="panel-heading" role="tab" id="headingThree">
 95       <h4 class="panel-title">
 96         <a class="collapsed"  href="/student/" aria-controls="collapseThree">
 97           学生
 98         </a>
 99       </h4>
100     </div>
101   </div>
102 </div>
103 
104         </div>
105         <div class="col-sm-9 col-sm-offset-3 col-md-10 col-md-offset-2 main">
106 
107 
108           <div class="panel panel-default">
109   <div class="panel-heading">Panel heading</div>
110   <div class="panel-body">
111     <div class="row">
112     <form class="navbar-form navbar-left col-sm-12" role="search">
113   <div class="form-group">
114     <input type="text" class="form-control" placeholder="搜索">
115   </div>
116   <button type="submit" class="btn btn-info">搜索</button>
117 
118 </form>
119         <a href="/sadd/" class="btn btn-success pull-right" style="margin-right: 15px;margin-top:8px ">网页添加</a>
120 <button class="btn btn-success pull-right" style="margin-right: 15px;margin-top:8px " data-toggle="modal" data-target="#myModal">添加</button>
121       </div>
122     <div class="modal fade j" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
123   <div class="modal-dialog j" role="document">
124     <div class="modal-content j">
125       <div class="modal-header">
126         <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
127         <h4 class="modal-title" id="myModalLabel">信息填写</h4>
128       </div>
129       <div class="modal-body">
130           <form>
131         <div class="form-group">
132     <label for="d1">学生名</label>
133     <input type="text" class="hui form-control" id="d1">
134             </div>
135          <div class="form-group">
136     <label for="d3" class=" control-label">班级id</label>
137         <select class="form-control" name="sclass">
138             {% for csl in cs_list %}
139           <option value="{{ csl.cid }}">{{ csl.cname }}</option>
140             {% endfor %}
141 </select>
142     </div>
143           <span id="error-msg"></span>
144 <div class="modal-footer">
145     <button class="an btn btn-default" data-dismiss="modal">Close</button>
146     <button class="anq btn btn-primary" id="modal-submit" type="button" >确定添加</button>
147       </div>
148               </form>
149       </div>
150 
151     </div>
152   </div>
153 </div>
154 
155 
156 {#  <modaladd>#}
157 <div class="modal fade j" id="edit_myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
158   <div class="modal-dialog j" role="document">
159     <div class="modal-content j">
160       <div class="modal-header">
161         <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
162         <h4 class="modal-title" id="myModalLabel">信息填写</h4>
163       </div>
164       <div class="modal-body">
165           <form>
166         <div class="form-group">
167             <input type="text" style="display: none" id="ed3">
168     <label for="d1">学生名</label>
169     <input type="text" class="hui form-control" id="ed1">
170             </div>
171          <div class="form-group">
172     <label for="edit_sele" class=" control-label">班级id</label>
173         <select class="form-control" id="edit_sele">
174             {% for csl in cs_list %}
175           <option value="{{ csl.cid }}">{{ csl.cname }}</option>
176             {% endfor %}
177         </select>
178     </div>
179           <span id="error-msg"></span>
180 <div class="modal-footer">
181     <button class="an btn btn-default" data-dismiss="modal">Close</button>
182     <button class="anq btn btn-primary" id="edit-modal-submit" type="button" >确定修改</button>
183       </div>
184               </form>
185       </div>
186 
187     </div>
188   </div>
189 </div>
190 
191 {#  </modaladd>#}
192 
193   <div class="table-responsive">
194             <table class="table table-striped table-bordered">
195               <thead>
196                 <tr>
197                   <th class="col-sm-1">#</th>
198                   <th>学生名</th>
199                     <th>班级名</th>
200                   <th>操作</th>
201                 </tr>
202               </thead>
203               <tbody>
204               {% for student in student_list %}
205                 <tr>
206                   <td class="col-sm-1">{{ student.id}}</td>
207                   <td>{{ student.sname }}</td>
208                     <td cid="{{ student.class_id }}">{{ student.cname }}</td>
209                   <td class="col-sm-8 ">
210                       <a href="/sdelete/?s_id={{ student.id }}" class="del btn btn-danger col-sm-offset-3 glyphicon glyphicon-remove">删除</a>
211                             <a href="/sedit/?s_id={{ student.id }}" class="w btn btn-success glyphicon glyphicon-pencil">编辑</a>
212                       <button  class="wm btn btn-success glyphicon glyphicon-pencil">modal编辑</button>
213                       <button id="sweetd" class="del btn btn-danger  glyphicon glyphicon-remove">页面删除</button>
214                   </td>
215                 </tr>
216                 {% endfor %}
217               </tbody>
218             </table>
219           </div>
220 
221     <nav aria-label="Page navigation" class=" pull-right">
222   <ul class="pagination">
223     <li>
224       <a href="#" aria-label="Previous">
225         <span aria-hidden="true">&laquo;</span>
226       </a>
227     </li>
228     <li><a href="#">1</a></li>
229     <li><a href="#">2</a></li>
230     <li><a href="#">3</a></li>
231     <li><a href="#">4</a></li>
232     <li><a href="#">5</a></li>
233     <li>
234       <a href="#" aria-label="Next">
235         <span aria-hidden="true">&raquo;</span>
236       </a>
237     </li>
238   </ul>
239 </nav>
240         </div>
241       </div>
242     </div>
243   </div>
244     </div>
245 
246 
247     <!-- Bootstrap core JavaScript
248     ================================================== -->
249     <!-- Placed at the end of the document so the pages load faster -->
250     <script src="/static/Dashboard%20Temp_files/jquery.js"></script>
251     <script>window.jQuery || document.write('<script src="../../assets/js/vendor/jquery.min.js"><\/script>')</script>
252     <script src="/static/Dashboard%20Temp_files/bootstrap.js"></script>
253     <!-- Just to make our placeholder images work. Don't actually copy the next line! -->
254     <script src="/static/Dashboard%20Temp_files/holder.js"></script>
255     <!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
256     <script src="/static/Dashboard%20Temp_files/ie10-viewport-bug-workaround.js"></script>
257     <script src="/static/sweetalert/sweetalert.min.js"></script>
258     <script>
259         $("#modal-submit").on("click", function () {
260 {#            $("#myModal form").submit();#}
261             var studentName = $("#d1").val();
262             var studentId=$("option:selected").val();
263 {#          用AJAX不刷新页面提交到后端#}
264           $.ajax({
265               url: "/modal_add_student/",
266               type: "POST",
267               data: {"studentname": studentName,"studentid":studentId},
268               success: function (data) {
269                   if (data === "OK"){
270                       location.href="/student/";
271 
272                   }else {
273                       $("#error-msg").text(data).parent().parent().addClass("has-error");
274                   }
275               }
276           })
277       });
278         $(".wm").on("click",function () {
279             $sz=$(this).parent().parent().children();
280             $("#ed1").val($($sz[1]).text());
281             zhi=$($sz[2]).attr("cid");
282             $("#edit_sele").val(zhi);
283             $("#ed3").val($($sz[0]).text());
284             $("#edit_myModal").modal("show");
285         });
286         $("#edit-modal-submit").on("click", function () {
287             var studentName = $("#ed1").val();
288             var studentId=$("#edit_sele option:selected").val();
289             var student_gd=$("#ed3").val();
290 {#          用AJAX不刷新页面提交到后端#}
291           $.ajax({
292               url: "/modal_edit_student/",
293               type: "POST",
294 
295               data: {"studentname": studentName,"studentid":studentId,"student_gd":student_gd},
296               success: function (data) {
297                   if (data === "OK"){
298                       location.href="/student/";
299 
300                   }else {
301                       $("#error-msg").text(data).parent().parent().addClass("has-error");
302                   }
303               }
304           })
305       });
306 
307 {#        二次删除     #}
308         $("table").on("click" , "#sweetd", function () {
309         var studentID = $(this).parent().parent().children().eq(0).text();
310         var $tr = $(this).parent().parent();
311         // 弹出sweetalert二次确认框
312         // swal("1", "2", "warning");
313         swal({
314         title: "删除此学生信息？",
315         text: "删除后无法回复。",
316         type: "warning",
317         showCancelButton: true,
318         closeOnConfirm: false,
319         confirmButtonText: "继续删除！",
320         confirmButtonColor: "#ec6c62",
321         cancelButtonText: "再想一想"
322     }, function (isConfirm) {
323         if (!isConfirm) return;
324         $.ajax({
325             type: "post",
326             url: "/modal_delete_student/",
327             data: {"student_id": studentID},
328             success: function (data) {
329                 var dataObj = $.parseJSON(data);
330                 if (dataObj.status === 0) { //后端删除成功
331                     swal("删除成功", dataObj.msg, "success");
332                     $tr.remove()  //删除页面中那一行数据
333                 } else {
334                     swal("出错啦。。。", dataObj.msg, "error");  //后端删除失败
335                 }
336             },
337             error: function () {  // ajax请求失败
338                 swal("啊哦。。。", "服务器走丢了。。。", "error");
339             }
340         })
341     });
342     })
343     </script>
344 </body></html>

学生信息管理html

学生信息页面的js中，值得一提的是学生的班级信息，并不是通过input中type为text的输入框来获取值了，而是通过select标签来进行选择性的value获取，展示的时候同样是通过模板语言的循环将数据展示，select也是如此。

在学生添加的过程中，select标签要通过option:selected 来判断是否为选中项，获取value的方法同输入框。

而且这时要考虑到学生编辑时展示的信息时学生当前最新信息，所以要在input框中添加学生当前最新姓名，还有所属班级。那样的话都input输入框可以用jQuery中的.val()方法来传入当前值，也就是获取所点击编辑的父代的父代的学生名字的td标签的text值，然后赋给当前modal输入框的value属性，select选中的话也是.val()方法，不过val()的括号中要添加的就是班级的id的值了，这样的话值与select标签中option标签的value相等就会选中了。

在删除学生信息的时候，用了二次提醒删除事件，导入了一个插件sweetalert也就是弹出是否确定删除的信息，详细方法参考sweetalert的官网使用。

 1 def student(request):
 2 
 3    conn=pymysql.connect(
 4        host='127.0.0.1',port=3306,
 5        user='root',password='',db='day66',charset='utf8'
 6 
 7    )
 8    cursor=conn.cursor(cursor=pymysql.cursors.DictCursor)
 9    cursor.execute("select student.id,student.sname,class.cname,student.class_id from student INNER JOIN  class on student.class_id = class.cid")
10    student_list=cursor.fetchall()
11    cursor.execute("select cid,cname from class")
12    cs_list = cursor.fetchall()
13    cursor.close()
14    conn.close()
15    return  render(request,'student.html',{'student_list':student_list,"cs_list":cs_list})

学生信息展示

同样通过查找数据库的数据来进行数据展示

 1 def modal_add_student(request):
 2     if request.method == "POST":
 3         new_student_name = request.POST.get("studentname")
 4         new_student_id_=request.POST.get("studentid")
 5         new_student_id_=int(new_student_id_)
 6         conn = pymysql.connect(
 7             host='127.0.0.1', port=3306,
 8             user='root', password='', db='day66', charset='utf8'
 9         )
10         cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
11         if new_student_name:
12             cursor.execute("insert into student(sname,class_id)values (%s,%s)", [new_student_name,new_student_id_])
13             conn.commit()
14             cursor.close()
15             conn.close()
16             return HttpResponse("OK")
17 
18         else:
19             error = "班级名称不能为空"
20             return HttpResponse(error)

学生信息添加

同班级信息添加，不过这时要添加的就是两条信息了，所以表的自增ID不用添加。

 1 def modal_edit_student(request):
 2     if request.method == "POST":
 3         new_student_name = request.POST.get("studentname")
 4         new_student_id_=request.POST.get("studentid")
 5         new_student_gd = request.POST.get("student_gd")
 6         new_student_id=int(new_student_id_)
 7         new_student_gd_ = int(new_student_gd)
 8         conn = pymysql.connect(
 9             host='127.0.0.1', port=3306,
10             user='root', password='', db='day66', charset='utf8'
11         )
12         cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
13         if new_student_name:
14             cursor.execute("update student set sname=%s where id=%s ", [new_student_name,new_student_gd])
15             cursor.execute("update student set class_id=%s where id=%s ", [new_student_id, new_student_gd])
16             conn.commit()
17             cursor.close()
18             conn.close()
19             return HttpResponse("OK")
20 
21         else:
22             error = "学生名称不能为空"
23             return HttpResponse(error)

学生信息编辑

同班级信息编辑差不多，不过修改的时候要带上class_id

 1 def modal_delete_student(request):
 2     if request.method == "POST":
 3         new_student_gd = request.POST.get("student_id")
 4         new_student_id=int(new_student_gd)
 5         print(new_student_id)
 6         conn = pymysql.connect(
 7             host='127.0.0.1', port=3306,
 8             user='root', password='', db='day66', charset='utf8'
 9         )
10         cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
11         if new_student_gd:
12             cursor.execute("delete from student where id=%s ", [new_student_id])
13             conn.commit()
14             cursor.close()
15             conn.close()
16             ret=json.dumps({"status":0,"msg":'一鼓作气'})
17             return HttpResponse(ret)
18         else:
19             error = "有一些小毛病"
20             ret = json.dumps({"status": 1, "msg": error})
21             return HttpResponse(ret)

学生信息删除

返回给前端的是一条字典信息，前面status中是状态码，后面的msg中是错误信息，前端通过状态码来判断是否修改完成。因为前后端间传值只能是字符串所以要用json.dumps来序列化一下，前端通过JSON.parse来解析。

下面是比较复杂的教师页面管理：

  1 <!DOCTYPE html>
  2 <html lang="zh-CN"><head>
  3 <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  4     <meta charset="utf-8">
  5     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6     <meta name="viewport" content="width=device-width, initial-scale=1">
  7   <link rel="stylesheet" href="/static/dist/css/bootstrap.css">
  8     <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
  9     <meta name="description" content="">
 10     <meta name="author" content="">
 11     <link rel="icon" href="http://v3.bootcss.com/favicon.ico">
 12     <title>Dashboard Template for Bootstrap</title>
 13 
 14     <!-- Bootstrap core CSS -->
 15     <link href="/static/Dashboard%20Temp_files/bootstrap.css" rel="stylesheet">
 16 
 17     <!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
 18     <link href="/static/Dashboard%20Temp_files/ie10-viewport-bug-workaround.css" rel="stylesheet">
 19 
 20     <!-- Custom styles for this template -->
 21     <link href="/static/Dashboard%20Temp_files/dashboard.css" rel="stylesheet">
 22 
 23     <!-- Just for debugging purposes. Don't actually copy these 2 lines! -->
 24     <!--[if lt IE 9]><script src="../../assets/js/ie8-responsive-file-warning.js"></script><![endif]-->
 25     <script src="/static/Dashboard%20Temp_files/ie-emulation-modes-warning.js"></script>
 26     <link href="/static/sweetalert/sweetalert.css" rel="stylesheet">
 27     <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
 28     <!--[if lt IE 9]>
 29       <script src="https://cdn.bootcss.com/html5shiv/3.7.3/html5shiv.min.js"></script>
 30       <script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script>
 31     <![endif]-->
 32   </head>
 33 <style>
 34   .col-centered {
 35                   float: none;
 36                   margin: 0 auto;
 37                 }
 38   .cd{
 39     background-color: black;
 40   }
 41 </style>
 42   <body>
 43 
 44     <nav class="navbar navbar-inverse navbar-fixed-top">
 45       <div class="container-fluid">
 46         <div class="navbar-header">
 47           <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
 48             <span class="sr-only">Toggle navigation</span>
 49             <span class="icon-bar"></span>
 50             <span class="icon-bar"></span>
 51             <span class="icon-bar"></span>
 52           </button>
 53           <a class="navbar-brand" href="#">Project name</a>
 54         </div>
 55         <div id="navbar" class="navbar-collapse collapse">
 56           <ul class="nav navbar-nav navbar-right">
 57             <li><a href="#">Dashboard</a></li>
 58             <li><a href="#">Settings</a></li>
 59             <li><a href="#">Profile</a></li>
 60             <li><a href="#">Help</a></li>
 61           </ul>
 62           <form class="navbar-form navbar-right">
 63             <input class="form-control" placeholder="Search..." type="text">
 64           </form>
 65         </div>
 66       </div>
 67     </nav>
 68 
 69     <div class="container-fluid">
 70       <div class="row">
 71         <div class="col-sm-3 col-md-2 sidebar">
 72 
 73           <div class="panel-group" id="accordion" role="tablist" aria-multiselectable="true">
 74   <div class="panel panel-default">
 75     <div class="panel-heading  cd" role="tab" id="headingOne">
 76       <h4 class="panel-title">
 77         <a  href="/class/" id="classfl">
 78           班级
 79         </a>
 80       </h4>
 81     </div>
 82   </div>
 83   <div class="panel panel-default">
 84     <div class="panel-heading" role="tab" id="headingTwo">
 85       <h4 class="panel-title">
 86         <a class="collapsed"  href="/teacher/" aria-controls="collapseTwo">
 87           教师
 88         </a>
 89       </h4>
 90     </div>
 91   </div>
 92   <div class="panel panel-default">
 93     <div class="panel-heading" role="tab" id="headingThree">
 94       <h4 class="panel-title">
 95         <a class="collapsed"  href="/student/"aria-controls="collapseThree">
 96           学生
 97         </a>
 98       </h4>
 99     </div>
100   </div>
101 </div>
102 
103         </div>
104         <div class="col-sm-9 col-sm-offset-3 col-md-10 col-md-offset-2 main">
105 
106 
107           <div class="panel panel-default">
108   <div class="panel-heading">Panel heading</div>
109   <div class="panel-body">
110     <div class="row">
111     <form class="navbar-form navbar-left col-sm-12" role="search">
112   <div class="form-group">
113     <input type="text" class="form-control" placeholder="搜索">
114   </div>
115   <button type="submit" class="btn btn-info">搜索</button>
116 
117 </form>
118         <a href="/tadd/" class="btn btn-success pull-right" style="margin-right: 15px;margin-top:8px ">网页添加</a>
119 <button type="submit" class="btn btn-success pull-right" style="margin-right: 15px;margin-top:8px " data-toggle="modal" data-target="#myModal">添加</button>
120       </div>
121     <div class="modal fade j" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
122   <div class="modal-dialog j" role="document">
123     <div class="modal-content j">
124       <div class="modal-header">
125         <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
126         <h4 class="modal-title" id="myModalLabel">信息填写</h4>
127       </div>
128       <div class="modal-body">
129           <form action="">
130         <div class="form-group">
131     <label for="d1">姓名</label>
132     <input type="text" class="hui form-control" id="d1" autocomplete="off">
133             </div>
134               <span id="error-msg"></span>
135                <div class="form-group">
136     <label class=" control-label">所带班级</label>
137 
138         <div class="checkbox">
139             {% for csl in cs_list %}
140           <label>
141             <input type="checkbox" value="{{ csl.cid }}" name='check' autocomplete="off">
142            {{ csl.cname }}
143           </label>
144              {% endfor %}
145         </div>
146     </div>
147 <div class="modal-footer">
148     <button  class="an btn btn-default" data-dismiss="modal">Close</button>
149     <button type="button" class="anq btn btn-primary" id="jiao">确认添加</button>
150       </div>
151               </form>
152       </div>
153 
154     </div>
155   </div>
156 </div>
157 
158 {#<编辑modal>#}
159  <div class="modal fade j" id="edit_myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
160   <div class="modal-dialog j" role="document">
161     <div class="modal-content j">
162       <div class="modal-header">
163         <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
164         <h4 class="modal-title" id="myModalLabel">信息填写</h4>
165       </div>
166       <div class="modal-body">
167           <form action="">
168         <div class="form-group">
169     <label for="ed1">姓名</label>
170             <input type="text" id="ed5" style="display: none">
171     <input type="text" class="hui form-control" id="ed1">
172             </div>
173               <span id="error-msg-e"></span>
174                <div class="form-group">
175     <label class=" control-label">所带班级</label>
176 
177         <div class="checkbox">
178             {% for csl in cs_list %}
179           <label>
180             <input type="checkbox" value="{{ csl.cid }}" name='checkc'>
181            {{ csl.cname }}
182           </label>
183              {% endfor %}
184         </div>
185     </div>
186 <div class="modal-footer">
187     <button  class="an btn btn-default" data-dismiss="modal">Close</button>
188     <button type="button" class="anq btn btn-primary" id="xiu">确认修改</button>
189       </div>
190               </form>
191       </div>
192 
193     </div>
194   </div>
195 </div>
196 {#</编辑modal>#}
197 
198   <div class="table-responsive">
199             <table class="table table-striped table-bordered">
200               <thead>
201                 <tr>
202                   <th class="col-sm-1">#</th>
203                   <th>教师名</th>
204                     <th>所带班级</th>
205                   <th>操作</th>
206                 </tr>
207               </thead>
208               <tbody>
209               {% for teacher in teacher_list %}
210                 <tr>
211                   <td class="col-sm-1">{{ teacher.td}}</td>
212                   <td>{{ teacher.tn }}</td>
213                     <td cid="{{ teacher.cd }}">{{ teacher.cn }}</td>
214                   <td class="col-sm-8 ">
215                       <a href="/tdelete/?t_id={{ teacher.td }}" class="del btn btn-danger col-sm-offset-3 glyphicon glyphicon-remove">删除</a>
216                             <a href="/tedit/?t_id={{ teacher.td }}" class="w btn btn-success glyphicon glyphicon-pencil">编辑</a>
217                           <button  class="wm btn btn-success glyphicon glyphicon-pencil">modal编辑</button>
218                           <button id="sweetd" class="del btn btn-danger  glyphicon glyphicon-remove">页面删除</button></td>
219                 </tr>
220                   {% empty %}
221                   <tr><td colspan="3" style="text-align: center">没有数据</td></tr>
222                 {% endfor %}
223               </tbody>
224             </table>
225           </div>
226 
227     <nav aria-label="Page navigation" class=" pull-right">
228   <ul class="pagination">
229     <li>
230       <a href="#" aria-label="Previous">
231         <span aria-hidden="true">&laquo;</span>
232       </a>
233     </li>
234     <li><a href="#">1</a></li>
235     <li><a href="#">2</a></li>
236     <li><a href="#">3</a></li>
237     <li><a href="#">4</a></li>
238     <li><a href="#">5</a></li>
239     <li>
240       <a href="#" aria-label="Next">
241         <span aria-hidden="true">&raquo;</span>
242       </a>
243     </li>
244   </ul>
245 </nav>
246         </div>
247       </div>
248     </div>
249   </div>
250     </div>
251 
252 
253     <!-- Bootstrap core JavaScript
254     ================================================== -->
255     <!-- Placed at the end of the document so the pages load faster -->
256     <script src="/static/Dashboard%20Temp_files/jquery.js"></script>
257     <script>window.jQuery || document.write('<script src="../../assets/js/vendor/jquery.min.js"><\/script>')</script>
258     <script src="/static/Dashboard%20Temp_files/bootstrap.js"></script>
259     <!-- Just to make our placeholder images work. Don't actually copy the next line! -->
260     <script src="/static/Dashboard%20Temp_files/holder.js"></script>
261     <!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
262     <script src="/static/Dashboard%20Temp_files/ie10-viewport-bug-workaround.js"></script>
263     <script src="/static/sweetalert/sweetalert.min.js"></script>
264   <script>
265      $("#jiao").on("click",function () {
266          var tname=$("#d1").val();
267          var checkID = [];
268          $("input[name='check']:checked").each(function(i){//把所有被选中的复选框的值存入数组
269            checkID[i] =$(this).val();
270          });
271          var cck=JSON.stringify(checkID);
272          $.ajax({
273              url:"/modal_add_teacher/",
274              type:"post",
275              data:{"teachername":tname,"checkid":cck},
276              success:function (data) {
277 {#                     }#}
278                  if(data=='OK'){
279                      location.reload()
280                  }
281                      else
282                      {
283                          $("#error-msg").text(data).parent().parent().addClass("has-error");
284                      }
285                  }
286 
287              })
288          });
289 
290 {#   编辑modal:#}
291       $(".wm").on("click",function () {
292               $sz=$(this).parent().parent().children();
293             $("#ed1").val($($sz[1]).text());
294              $("#ed5").val($($sz[0]).text());
295             zhi=$($sz[2]).attr("cid");
296             xinzhi=zhi.split(',');
297             console.log(xinzhi);
298             for (i=0;i<xinzhi.length;i++){
299                 $inb=$("input[name='checkc']");
300                 for(j=0;j<$inb.length;j++){
301                 if($($inb[j]).val()==xinzhi[i]){
302                     $($inb[j]).attr("checked",true);
303                 }
304                 }
305             }
306             $("#edit_myModal").modal("show");
307       });
308 
309 
310       $("#xiu").on("click",function () {
311           var tname=$("#ed1").val();
312           var tid = $("#ed5").val();
313          var checkID = [];
314          $("input[name='checkc']:checked").each(function(i){//把所有被选中的复选框的值存入数组
315            checkID[i] =$(this).val();
316          });
317          var cck=JSON.stringify(checkID);
318          $.ajax({
319              url:"/modal_edit_teacher/",
320              type:"post",
321              data:{"teachername":tname,"checkid":cck,"tid":tid},
322              success:function (data) {
323 {#                     }#}
324                  if(data=='OK'){
325                      location.reload()
326                  }
327                      else
328                      {
329                          $("#error-msg-e").text(data).parent().parent().addClass("has-error");
330                      }
331                  }
332 
333              })
334          });
335 
336 
337 {#      删除开始#}
338       $("table").on("click" , "#sweetd", function () {
339         var teacherID = $(this).parent().parent().children().eq(0).text();
340         var $tr = $(this).parent().parent();
341         // 弹出sweetalert二次确认框
342         // swal("1", "2", "warning");
343         swal({
344         title: "删除此教师信息？",
345         text: "删除后无法回复",
346         type: "warning",
347         showCancelButton: true,
348         closeOnConfirm: false,
349         confirmButtonText: "继续删除！",
350         confirmButtonColor: "#ec6c62",
351         cancelButtonText: "再想一想"
352     }, function (isConfirm) {
353         if (!isConfirm) return;
354         $.ajax({
355             type: "post",
356             url: "/modal_delete_teacher/",
357             data: {"teacher_id": teacherID},
358             success: function (data) {
359                 var dataObj = $.parseJSON(data);
360                 if (dataObj.status === 0) { //后端删除成功
361                     swal("删除成功", dataObj.msg, "success");
362                     $tr.remove()  //删除页面中那一行数据
363                 } else {
364                     swal("出错啦。。。", dataObj.msg, "error");  //后端删除失败
365                 }
366             },
367             error: function () {  // ajax请求失败
368                 swal("啊哦。。。", "服务器走丢了。。。", "error");
369             }
370         })
371     });
372     })
373 
374   </script>
375     <script>
376 
377     </script>
378 </body></html>

教师页面管理html

与其他页面功能相同，一个教师可以带多个班级，所以添加信息与编辑信息中，使用的是checkbox来进行多选，值得一提：

$("input[name='check']:checked").each(function(i){//把所有被选中的复选框的值存入数组
checkID[i] =$(this).val();
});

这个方法是来获取选中的checkbox的值的

$inb=$("input[name='checkc']");
for(j=0;j<$inb.length;j++){
if($($inb[j]).val()==xinzhi[i]){
$($inb[j]).attr("checked",true);
}}

这个方法是来选中checkbox的，用于在编辑时向用户展示教师现有班级的信息

 1 def teacher(request):
 2 
 3    conn=pymysql.connect(
 4        host='127.0.0.1',port=3306,
 5        user='root',password='',db='day66',charset='utf8'
 6 
 7    )
 8    cursor=conn.cursor(cursor=pymysql.cursors.DictCursor)
 9    cursor.execute("select t2.td,t2.tn,group_concat(cname) as cn ,group_concat(cid) as cd from class RIGHT join (select t1.tid as td,t1.tname as tn,class_id  from teacher2class INNER join (select tid,tname from teacher)t1 ON teacher2class.teacher_id=t1.tid)t2 on t2.class_id=class.cid GROUP by t2.td")
10    teacher_list=cursor.fetchall()
11    cursor.execute("select cid,cname from class")
12    cs_list = cursor.fetchall()
13    cursor.close()
14    conn.close()
15    return  render(request,'teacher.html',{'teacher_list':teacher_list,"cs_list":cs_list})

教师信息展示

拿数据库信息展示时，因为教师可以教多个班级，所以教师在与班级关联的表当中同样的tid会有多条信息，所以联表查询，再用group by分组与group_concat来将同一个教师的班级来进行聚合字符串拼接，这样cn字段拿到的值就是一个教师带的多个班级

def modal_add_teacher(request):if request.method == "POST":new_teacher_name = request.POST.get("teachername")new_class_id = request.POST.get("checkid")new_class_id=json.loads(new_class_id)print(new_class_id)if new_teacher_name:conn = pymysql.connect(host='127.0.0.1', port=3306,user='root', password='', db='day66', charset='utf8')cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)cursor.execute("insert into teacher(tname) VALUES (%s)", [new_teacher_name,])conn.commit()cursor.close()conn.close()conn = pymysql.connect(host='127.0.0.1', port=3306,user='root', password='', db='day66', charset='utf8')cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)cursor.execute("select * from teacher")t_clists = cursor.fetchall()[-1]tc_id=t_clists["tid"]for item in new_class_id:itemq = int(item)cursor.execute("insert into teacher2class(class_id,teacher_id) VALUES (%s,%s)", [itemq, tc_id])conn.commit()cursor.close()conn.close()return HttpResponse("OK")else:error = "班级名称不能为空"return HttpResponse(error)

教师添加信息

从前端拿值，取到的班级信息的值是一个列表类型的，所以要循环sql语句来进行添加，不光要在教师表添加教师信息，同样在教师与班级关联的表也要添加信息

 1 def modal_edit_teacher(request):
 2     if request.method == "POST":
 3         new_teacher_name = request.POST.get("teachername")
 4         new_class_id = request.POST.get("checkid")
 5         new_t_id = request.POST.get("tid")
 6         newtd=int(new_t_id)
 7         new_class_id=json.loads(new_class_id)
 8         if new_teacher_name:
 9             conn = pymysql.connect(
10                 host='127.0.0.1', port=3306,
11                 user='root', password='', db='day66', charset='utf8'
12             )
13             cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
14             cursor.execute("update teacher set tname=%s where tid=%s", [new_teacher_name,newtd])
15             conn.commit()
16             cursor.close()
17             conn.close()
18             conn = pymysql.connect(
19                 host='127.0.0.1', port=3306,
20                 user='root', password='', db='day66', charset='utf8'
21             )
22             cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
23             cursor.execute("select class_id from teacher2class INNER join (select tid from teacher where tname=%s)t1 on teacher_id = t1.tid",[new_teacher_name])
24             ret=cursor.fetchall()
25             li=[]
26             for it in ret:
27                 li.append(str(it["class_id"]))
28             old=set(li)
29             old_new=old.symmetric_difference(new_class_id)
30             if old_new:
31                 new=(old_new.difference(old))
32                 olds=(old_new.difference(new_class_id))
33                 if new:
34                     for inew in new:
35                         cursor.execute("insert into teacher2class(class_id, teacher_id) VALUES(%s,%s) ", [inew, new_t_id])
36                 if olds:
37                     for iold in olds:
38                         cursor.execute("delete from teacher2class where class_id=%s",[iold])
39                 conn.commit()
40                 cursor.close()
41                 conn.close()
42             return HttpResponse("OK")
43         else:
44             error = "班级名称不能为空"
45             return HttpResponse(error)

教师编辑信息

这部分代码有两种做法，因为取到的前端的class_id部分的值是字典，所以循环取值，然后通过set集合，来求出旧的class_id的集合与ajax传来的class_id的值的差集，然后再判断如果这个差集中含有接收来的class_id中没有的值那么就是旧的中的值，需要删除，如果是旧的中没有的，就是新的值，需要添加。

第二种方法，直接删除原有的所有在教师与班级关联表中的符合tid值的信息，这样的话这个教师的所有数据就没了，然后再将传来的值直接添加进去。

 1 def modal_delete_teacher(request):
 2     if request.method == "POST":
 3         new_teacher_gd = request.POST.get("teacher_id")
 4         new_teacher_id=int(new_teacher_gd)
 5         conn = pymysql.connect(
 6             host='127.0.0.1', port=3306,
 7             user='root', password='', db='day66', charset='utf8'
 8         )
 9         cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
10         if new_teacher_gd:
11             cursor.execute("delete from teacher where tid=%s ", [new_teacher_id])
12             cursor.execute("delete from teacher2class where teacher_id=%s ", [new_teacher_id])
13             conn.commit()
14             cursor.close()
15             conn.close()
16             ret=json.dumps({"status":0,"msg":'一鼓作气'})
17             return HttpResponse(ret)
18 
19         else:
20             error = "有一些小毛病"
21             ret = json.dumps({"status": 1, "msg": error})
22             return HttpResponse(ret)