1 from django.db import models 2  3 class Classes(models.Model): 4     title = models.CharField(max_length=32) 5  6  7 class Student(models.Model): 8     name = models.CharField(max_length=32) 9     email = models.CharField(max_length=32)10     age = models.IntegerField()11     cls = models.ForeignKey(‘Classes‘)12 13 14 class Teacher(models.Model):15     tname = models.CharField(max_length=32)16     c2t = models.ManyToManyField(‘Classes‘)

from django.conf.urls import urlfrom django.contrib import adminfrom app01 import viewsurlpatterns = [    url(r‘^admin/‘, admin.site.urls),    url(r‘^class_list/‘, views.class_list),    url(r‘^add_class/‘, views.add_class),    url(r‘^edit_class/(\d+)/‘, views.edit_class),    url(r‘^student_list/‘, views.student_list),    url(r‘^add_student/‘, views.add_student),    url(r‘^edit_student/(\d+)/‘, views.edit_student),    url(r‘^teacher_list/‘, views.teacher_list),    url(r‘^add_teacher/‘, views.add_teacher),    url(r‘^edit_teacher/(\d+)/‘, views.edit_teacher),    url(r‘^test/‘, views.test),]

  1 from django.shortcuts import render,redirect,HttpResponse  2 from app01 import models  3 from django.forms import Form  4 from django.forms import fields  5 from django.forms import widgets  6   7   8 # **************************班级信息**************************  9 class ClassForm(Form): 10     title = fields.RegexField(‘全栈\d+‘) 11  12 def class_list(request): 13     cls_list = models.Classes.objects.all() 14     return render(request,‘class_list.html‘,{‘cls_list‘:cls_list}) 15  16 def add_class(request): 17     if request.method == "GET": 18         obj = ClassForm() 19         return render(request,‘add_class.html‘,{‘obj‘: obj}) 20     else: 21         obj = ClassForm(request.POST) 22         if obj.is_valid(): 23             # obj.cleaned_data # 字典 24             # 数据库创建一条数据 25             # print(obj.cleaned_data) 26             # models.Classes.objects.create(title=obj.cleaned_data[‘tt‘]) 27  28             models.Classes.objects.create(**obj.cleaned_data) 29             return redirect(‘/class_list/‘) 30         return render(request,‘add_class.html‘,{‘obj‘: obj}) 31  32 def edit_class(request,nid): 33     if request.method == "GET": 34         row = models.Classes.objects.filter(id=nid).first() 35         # 让页面显示初始值 36         # obj = ClassForm(data=http://www.mamicode.com/{‘title‘: ‘asdfasdfasdfas‘}) 37         obj = ClassForm(initial={‘title‘: row.title}) 38         return render(request,‘edit_class.html‘,{‘nid‘: nid,‘obj‘:obj}) 39     else: 40         obj = ClassForm(request.POST) 41         if obj.is_valid(): 42             models.Classes.objects.filter(id=nid).update(**obj.cleaned_data) 43             return redirect(‘/class_list/‘) 44         return render(request,‘edit_class.html‘,{‘nid‘: nid,‘obj‘:obj}) 45  46  47  48 # **************************学生信息************************** 49 class StudentForm(Form): 50     name = fields.CharField( 51         min_length=2, 52         max_length=6, 53         widget=widgets.TextInput(attrs={‘class‘: ‘form-control‘}) 54     ) 55     email = fields.EmailField(widget=widgets.TextInput(attrs={‘class‘: ‘form-control‘})) 56     age = fields.IntegerField(min_value=http://www.mamicode.com/18,max_value=25,widget=widgets.TextInput(attrs={‘class‘: ‘form-control‘})) 57     cls_id = fields.IntegerField( 58         # widget=widgets.Select(choices=[(1,‘上海‘),(2,‘北京‘)]) 59         #widgets 定义生成的标签类型           select下来菜单标签从数据库取值时使用values_list 60         widget=widgets.Select(choices=models.Classes.objects.values_list(‘id‘,‘title‘),attrs={‘class‘: ‘form-control‘}) 61     ) 62  63 def student_list(request): 64     stu_list = models.Student.objects.all() 65     return render(request,‘student_list.html‘,{‘stu_list‘:stu_list}) 66  67 def add_student(request): 68     if request.method == "GET": 69         obj = StudentForm() 70         return render(request,‘add_student.html‘,{‘obj‘:obj}) 71     else: 72         obj = StudentForm(request.POST) 73         if obj.is_valid(): 74             models.Student.objects.create(**obj.cleaned_data) 75             return redirect(‘/student_list/‘) 76         return render(request,‘add_student.html‘,{‘obj‘:obj}) 77  78 def edit_student(request,nid): 79     if request.method == "GET": 80         row = models.Student.objects.filter(id=nid).values(‘name‘,‘email‘,‘age‘,‘cls_id‘).first() 81         obj = StudentForm(initial=row)    #initial  只有HTML标签 82         return render(request,‘edit_student.html‘,{‘nid‘:nid,‘obj‘: obj}) 83     else: 84         obj = StudentForm(request.POST) 85         if obj.is_valid(): 86             models.Student.objects.filter(id=nid).update(**obj.cleaned_data) 87             return redirect(‘/student_list/‘) 88         return render(request,‘edit_student.html‘,{‘nid‘:nid,‘obj‘: obj}) 89  90  91  92 # **************************老师信息************************** 93 from django.forms import models as form_model  # 导入这个models as form_model 模块 94 class TeacherForm(Form): 95     tname = fields.CharField(min_length=2) 96  97     # xx = form_model.ModelMultipleChoiceField(queryset=models.Classes.objects.all()) 98  99     xx = fields.MultipleChoiceField(100         # choices=models.Classes.objects.values_list(‘id‘,‘title‘),     # 写了下面的那个BUG解决这条就不用写101         widget=widgets.SelectMultiple102     )103     def __init__(self,*args,**kwargs):                  # 解决刷新无法动态显示数据库内容的BUG104         super(TeacherForm,self).__init__(*args,**kwargs)105         self.fields[‘xx‘].choices = models.Classes.objects.values_list(‘id‘,‘title‘)106 107 def teacher_list(request):108     tea_list = models.Teacher.objects.all()109     return render(request,‘teacher_list.html‘,{‘tea_list‘:tea_list})110 111 def add_teacher(request):112     if request.method == ‘GET‘:113         obj = TeacherForm()114         return render(request,‘add_teacher.html‘,{‘obj‘:obj})115     else:116         obj = TeacherForm(request.POST)117         if obj.is_valid():118             xx = obj.cleaned_data.pop(‘xx‘)     #  pop 剔除，去掉119             row = models.Teacher.objects.create(**obj.cleaned_data)120             row.c2t.add(*xx)   #[1,2]121             return redirect(‘/teacher_list/‘)122         return render(request,‘add_teacher.html‘,{‘obj‘:obj})123 124 def edit_teacher(request,nid):125     if request.method == ‘GET‘:126         row = models.Teacher.objects.filter(id=nid).first()127         class_ids = row.c2t.values_list(‘id‘)128         # print(class_ids)129         # id_list = []130         id_list = list(zip(*class_ids))[0] if list(zip(*class_ids)) else []   # 这是个三元表达式  if 后面的如果为真就执行if前面的，否则就执行else后面的------zip是python内置函数131         # obj = TeacherForm(initial={‘tname‘:row.tname,‘xx‘:[1,2,3]})132         obj = TeacherForm(initial={‘tname‘: row.tname, ‘xx‘: id_list})          # initial 初始值（也就是默认值，这里要编辑的对象输入框内要有默认的老师，select下拉框内要有默认的任教班级）133         return render(request,‘edit_teacher.html‘,{‘obj‘:obj,‘nid‘:nid})134     else:135         obj = TeacherForm(request.POST)136         if obj.is_valid():137             xx = obj.cleaned_data.pop(‘xx‘)  # pop 剔除，去掉138             row = models.Teacher.objects.filter(id=nid).update(**obj.cleaned_data)139             row.c2t.add(*xx)140             return redirect(‘/teacher_list/‘)141         return render(request, ‘edit_teacher.html‘, {‘obj‘: obj})142 143 144 145 # **************************测试**************************146 from django.core.exceptions import ValidationError147 148 class TestForm(Form):149     user = fields.CharField(validators=[])150     pwd = fields.CharField()151 152     def clean_user(self):153         v = self.cleaned_data[‘user‘]154         if models.Student.objects.filter(name=v).count():155             raise ValidationError(‘用户名已经存在‘)156         return self.cleaned_data[‘user‘]157 158     def clean_pwd(self):159         return self.cleaned_data[‘pwd‘]160 161     def clean(self):162         # user = self.cleaned_data.get(‘user‘)163         # email = self.cleaned_data.get(‘email‘)164         # if models.Student.objects.filter(user=user,email=email).count():165         #     raise ValidationError(‘用户名和邮箱联合已经存在‘)166         return self.cleaned_data167 168         # def _post_clean(self):169         #     """170         #     An internal hook for performing additional cleaning after form cleaning171         #     is complete. Used for model validation in model forms.172         #     """173         #     pass174 175 176 177 def test(request):178     obj = TestForm(initial={‘t3‘:[2,3]})     #默认值为2,3179     obj.is_valid()180     return render(request,‘test.html‘,{‘obj‘:obj})

 1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4     <meta charset="UTF-8"> 5     <title></title> 6 </head> 7 <body> 8     <h1>学生列表</h1> 9     <a href="/add_student/">添加</a>10     <ul>11         {% for row in stu_list %}12             <li>13                 {{ row.name }}-{{ row.email }}-{{ row.age }}-{{ row.cls_id }}-{{ row.cls.title }}14                 <a href="/edit_student/{{ row.id }}/">编辑</a>15             </li>16         {% endfor %}17     </ul>18 </body>19 </html>

 1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4     <meta charset="UTF-8"> 5     <title></title> 6 </head> 7 <body> 8     <h1>老师列表</h1> 9     <div>10         <a href="/add_teacher/">添加</a>11     </div>12     <table border="1">13         <thead>14             <tr>15                 <th>ID</th>16                 <th>老师姓名</th>17                 <th>任教班级</th>18             </tr>19         </thead>20         <tbody>21             {% for row in tea_list %}22                 <tr>23                     <td>{{ row.id }}</td>24                     <td>{{ row.tname }}</td>25                     <td>26                         {% for row in row.c2t.all %}27                             {{ row.title }}28                         {% endfor %}29                     </td>30                     <td>31                         <a href="/edit_teacher/{{ row.id }}/">编辑</a>32                     </td>33                 </tr>34             {% endfor %}35         </tbody>36     </table>37 </body>38 </html>

 1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4     <meta charset="UTF-8"> 5     <title></title> 6 </head> 7 <body> 8     <h1>班级列表</h1> 9     <div>10         <a href="/add_class/">添加</a>11     </div>12     <ul>13         {% for row in cls_list %}14             <li>{{ row.title }} <a href="/edit_class/{{ row.id }}/">编辑</a>  </li>15         {% endfor %}16     </ul>17 </body>18 </html>

 1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4     <meta charset="UTF-8"> 5     <title></title> 6 </head> 7 <body> 8     <h1>添加学生</h1> 9     <form action="/add_student/" method="POST">10         {% csrf_token %}11         <p>12             {{ obj.name }}13         </p>14         <p>15             {{ obj.email }}16         </p>17         <p>18             {{ obj.age }}19         </p>20         <p>21             {{ obj.cls_id }}22         </p>23         <input type="submit" value="提交" />24     </form>25 </body>26 </html>

 1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4     <meta charset="UTF-8"> 5     <title></title> 6 </head> 7 <body> 8     <form method="POST" action="/add_teacher/"> 9         {% csrf_token %}10         <p>11             姓名:{{ obj.tname }}12         </p>13         <p>14             班级：{{ obj.xx }}15         </p>16         <input type="submit" value="提交">17     </form>18 </body>19 </html>

 1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4     <meta charset="UTF-8"> 5     <title></title> 6 </head> 7 <body> 8     <h1>添加班级</h1> 9     <form method="POST" action="/add_class/" novalidate>10         {% csrf_token %}11         {{ obj.title }} {{ obj.errors.title.0 }}12         <input type="submit" value="提交" />13     </form>14 </body>15 </html>

 1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4     <meta charset="UTF-8"> 5     <title></title> 6     <link rel="stylesheet" href="/static/bootstrap-3.3.7-dist/css/bootstrap-theme.css"/> 7 </head> 8 <body> 9     <div style="width: 500px;margin: 0 auto;">10         <form class="form-horizontal" method="POST" action="/edit_student/{{ nid }}/">11             {% csrf_token %}12             <div class="form-group">13                 <label class="col-sm-2 control-label">姓名：</label>14 15                 <div class="col-sm-10">16                     {{ obj.name }}17                 </div>18             </div>19             <div class="form-group">20                 <label class="col-sm-2 control-label">邮箱：</label>21 22                 <div class="col-sm-10">23                     {{ obj.email }}24                 </div>25             </div>26              <div class="form-group">27                 <label class="col-sm-2 control-label">年龄：</label>28 29                 <div class="col-sm-10">30                     {{ obj.age }}31                 </div>32             </div>33              <div class="form-group">34                 <label class="col-sm-2 control-label">班级：</label>35 36                 <div class="col-sm-10">37                     {{ obj.cls_id }}38                 </div>39             </div>40             <div class="form-group">41                 <div class="col-sm-offset-2 col-sm-10">42                     <input type="submit" class="btn btn-default" value="提交" />43                 </div>44             </div>45         </form>46     </div>47 </body>48 </html>

 1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4     <meta charset="UTF-8"> 5     <title></title> 6 </head> 7 <body> 8     <h1>编辑老师</h1> 9     <form method="POST" action="/edit_teacher/{{ nid }}/">10         {% csrf_token %}11         {{ obj.tname }}12         {{ obj.xx }}13         <input type="submit" value="提交">14     </form>15 </body>16 </html>

 1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4     <meta charset="UTF-8"> 5     <title></title> 6 </head> 7 <body> 8     <h1>编辑班级</h1> 9     <form method="POST" action="/edit_class/{{ nid }}/">10         {% csrf_token %}11         <p>12             {{ obj.title }} {{ obj.errors.title.0 }}13         </p>14         <input type=‘submit‘ value="提交" />15     </form>16 </body>17 </html>

 1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4     <meta charset="UTF-8"> 5     <title></title> 6 </head> 7 <body> 8         {{ obj.t1 }} 9         {{ obj.t2 }}10         {{ obj.t3 }}11         {{ obj.t4 }}12         {{ obj.t5 }}13 </body>14 </html>