Django Form组件 学生管理系统

from django.db import models

# Create your models here.

class Classes(models.Model):
    title=models.CharField(max_length=32)

class Student(models.Model):
    name=models.CharField(max_length=32)
    email=models.CharField(max_length=32)
    age=models.IntegerField(max_length=32)
    cls=models.ForeignKey("Classes")

class Teacher(models.Model):
    tname=models.CharField(max_length=32)
    c2t=models.ManyToManyField('Classes')

models

"""s4day77 URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/1.11/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 import views
urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^login/', views.login),
    url(r'^ajax_login/', views.ajax_login),
    url(r'^class_list/', views.class_list),
    url(r'^add_class/', views.add_class),
    url(r'^edit_class/(\d+)/', views.edit_class),
    url(r'^del_class/(\d+)/',views.del_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'^del_student/(\d+)/',views.del_student),

    url(r'^teacher_list/',views.teacher_list),
    url(r'^add_teacher/',views.add_teacher),
    url(r'^edit_teacher/(\d+)/',views.edit_teacher),

urls

from django.shortcuts import render,HttpResponse,redirect

# Create your views here.
from app01 import models
from django.forms import Form
from django.forms import fields  #字段包含正则表达式
from django.forms import widgets   #导入插件

class ClassesForm(Form):
    title=fields.RegexField("全栈\d+")    #自定义正则表达式制定规则

def class_list(request):
    cls_list=models.Classes.objects.all()
    return render(request,'class_list.html',{'cls_list':cls_list})

def add_class(request):
    if request.method == "GET":
        obj=ClassesForm()   #实例出一个对象，此时的obj为空值，为创建input标签
        return render(request,'add_class.html',{'obj':obj})
    else:
       obj=ClassesForm(request.POST)
       if obj.is_valid(): #校验值
        # 需要往数据库增加数据
       # print(obj.cleaned_data)  #打印前端传来的字典格式数据
            models.Classes.objects.create(**obj.cleaned_data)#因为数据是字典类型 增加的时候也可以是字典格式，索引直接**加数值
            return redirect('/class_list/')
       else:
           print(obj.errors)
           return render(request,'add_class.html',{'obj':obj})

def edit_class(request,nid):
    if request.method == "GET":
       row=models.Classes.objects.filter(id=nid).first() #查看数据库值
       #让页面显示初始值
       # obj = ClassForm(data={'title': 'asdfasdfasdfas'})
       obj=ClassesForm(initial={'title':row.title})  #初始默认值
       return render(request,'edit_class.html',{'nid':nid,'obj':obj})  #创建空input标签
    else:
        obj=ClassesForm(request.POST)
        if obj.is_valid():
            models.Classes.objects.filter(id=nid).update(**obj.cleaned_data)
            return redirect('/class_list/')
        else:
            print(obj.errors)
            return render(request,'edit_class.html',{'nid':nid,'obj':obj})

def del_class(request,nid):
    if request.method == "GET":
        models.Classes.objects.filter(id=nid).delete()
        return redirect('/class_list/')

class StudentForm(Form):
    name=fields.CharField(
        min_length=2,
        max_length=6,
    )
    email=fields.EmailField()
    age=fields.IntegerField(min_value=18,max_value=25)
    cls_id=fields.IntegerField(widget=widgets.Select(choices=models.Classes.objects.values_list("id","title")))#选择下拉框

def student_list(request):
    stu_list=models.Student.objects.all()
    return render(request,'student_list.html',{'stu_list':stu_list})

def add_student(request):
    if request.method == "GET":
        obj=StudentForm()
        return render(request,'add_student.html',{'obj':obj})
    else:
        obj=StudentForm(request.POST)
        if obj.is_valid():
            models.Student.objects.create(**obj.cleaned_data)
            return redirect('/student_list/')
        else:
            print(obj.errors)
            return render(request,'add_student.html',{'obj':obj})

def edit_student(request,nid):
    if request.method == "GET":
        #从学生数据库拿取name，email，age，cls_id值
        row=models.Student.objects.filter(id=nid).values("name","email","age","cls_id").first()
        obj=StudentForm(initial=row)  #添加为默认值 name，email，age，cls_id
        return render(request,'edit_student.html',{"nid":nid,"obj":obj}) #把obj放进前端 生成input标签
    else:
        obj=StudentForm(request.POST)   #前端传来的值以post方式取值
        if obj.is_valid():   #进行校验
          models.Student.objects.filter(id=nid).update(**obj.cleaned_data)  #正确校验的值，在进行更新
          return redirect('/student_list/')
        else:
            print(obj.errors)
            return render(request,'edit_student.html',{"nid":nid,"obj":obj})

def del_student(request,nid):
    if request.method =="GET":  #GET方式取nid
        models.Student.objects.filter(id=nid).delete()
        return redirect('/student_list/')

class TeacherFrom(Form):
    tname=fields.CharField(min_length=2)

    xx=fields.MultipleChoiceField(  #多选框用MultipleChoiceField
        # choices=models.Classes.objects.values_list("id","title"),
        widget=widgets.SelectMultiple)    #多选框

    def __init__(self,*args,**kwargs):   #修复一个小bug，定义一个init方法，继承TeacherTrom的内容，
        #构造自己都有的方法，每次实例化出来的对象。
        super(TeacherFrom,self).__init__(*args,**kwargs)
        self.fields['xx'].widget.choices=models.Classes.objects.values_list("id","title")

def teacher_list(request):
    tea_list=models.Teacher.objects.all()   #获取到老师所有的信息列表
    return render(request,'teacher_list.html',{'tea_list':tea_list})  #将老师列表的信息传入到HTML

def add_teacher(request):
    if request.method == "GET":    #如果是get方式，让用户看见add_teacher.html页面
        obj=TeacherFrom()           #实例化一个空对象
        return render(request,'add_teacher.html',{"obj":obj})#将实例化的对象传入前端页面进行设置input框

    else:
        obj=TeacherFrom(request.POST)   #后台取值操作 post方式
        if obj.is_valid():             #对form提交 的值进行校验，
            xx=obj.cleaned_data.pop("xx") #从字典里面的数据移除xx
            row=models.Teacher.objects.create(**obj.cleaned_data)#向老师列表中添加一条信息
            row.c2t.add(*xx)#向关联第三张表中添加数据
            return redirect("/teacher_list/")
        else:
            print(obj.errors)
            return render(request, 'add_teacher.html', {"obj": obj})

def edit_teacher(request,nid):
    if request.method == "GET":
       row=models.Teacher.objects.filter(id=nid).first()
       class_ids=row.c2t.values_list('id')
       # print(class_ids)
       # print(".......")
       #class_ids=[] 如果是这个方式的话 就可以用循环来做 然后添加到class_ids[]中
       id_list=list(zip(*class_ids))[0]if list(zip(*class_ids)) else[]  #是一个列表的值
       obj=TeacherFrom(initial={'tname':row.tname,'xx':id_list}) #设置默认值initial={}字典格式
       return render(request,'edit_teacher.html',{'nid':nid,'obj':obj})

    else:
        obj=TeacherFrom(request.POST)
        if obj.is_valid():
            # print(obj.cleaned_data)   #取到数据
            xx = obj.cleaned_data.pop('xx')    #将xx移除到clas_id
            row=models.Teacher.objects.filter(id=nid)   #查看教师的对应的id值
            row.update(**obj.cleaned_data)               #更新老师数据库里面的内容
            row.first().c2t.set(xx)    #
            return redirect("/teacher_list/")
        else:
            print(obj.errors)
        return render(request,'edit_teacher.html',{'nid':nid,'obj':obj})

app01 views

class_list：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h3>班级信息</h3>
<div>
    <a href="/add_class">添加</a>
</div>
<form method="POST" action="/class_list">
    {% csrf_token %}
<ul>
    {% for  row  in cls_list %}
        <li>
            {{ row.title }}
        <a href="/edit_class/{{ row.id }}/">编辑</a>
            |
        <a href="/del_class/{{ row.id }}/">删除</a>
        </li>
    {% endfor %}
</ul>

</form>
</body>
</html>

add_class：
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h3>添加班级</h3>

<form method="POST" action="/add_class/">
    {% csrf_token %}
    {{ obj.title }}{{ obj.errors.title.0 }}
    <p>
    <input type="submit" value="提交">
    </p>

</form>
</body>

class_list  add_class

edit_class :

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h3>编辑班级信息</h3>
<form method="POST" action="/edit_class/{{ nid }}/">
    {% csrf_token %}
    <p>
       {{ obj.title }}{{ obj.errors.title.0 }}
    </p>
    <p>
        <input type="submit" value="提交"/>
    </p>
</form>
</body>
</html>

edit_class del_class

student_list:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h3>班级信息</h3>
<div>
    <a href="/add_student/">添加</a>
</div>
<ul>
    {% for row in stu_list %}
        <li>
         {{ row.id }}
         {{ row.name}}
         {{ row.email}}
         {{ row.cls_id }}
         {{ row.cls_title }}
            |
        <a href="/edit_student/{{ row.id }}/">编辑</a>
            |
        <a href="/del_student/{{ row.id }}/">删除</a>
        </li>
    {% endfor %}
</ul>
</body>
</html>

add_student:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h3>添加学生信息</h3>
<form method="POST" action="/add_student/">
    {% csrf_token %}
    <p>用户名
     {{ obj.name }} {{ obj.errors.name.0 }}
    </p>
    <p>邮箱
     {{ obj.email }}{{ obj.errors.name.0 }}
    </p>
    <p>年龄
     {{ obj.age}}{{ obj.errors.age.0 }}
    </p>
    <p>班级名称
     {{ obj.cls_id }}{{ obj.errors.cls_id.0 }}
    </p>
    <p>
        <input type="submit" value="提交">
    </p>

</form>
</body>
</html>

student_list add_student

edit_student:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/static/plugins/bootstrap-3.3.7-dist/css/bootstrap.css">
</head>
<body>
<h1>编辑学生信息</h1>
<div style="width: 500px;margin: 0 auto"></div>
<form class="form-horizontal" method="POST" action="/edit_student/{{ nid }}/">
   {% csrf_token %}
    <p>用户名
     {{ obj.name }} {{ obj.errors.name.0 }}
    </p>
    <p>邮箱
     {{ obj.email }}{{ obj.errors.name.0 }}
    </p>
    <p>年龄
     {{ obj.age}}{{ obj.errors.age.0 }}
    </p>
    <p>班级名称
     {{ obj.cls_id }}{{ obj.errors.cls_id.0 }}
    </p>
    <p>
        <input type="submit" value="提交">
    </p>
{#<div class="form-group">#}
{#    <label class="col-sm-2 control-label">姓名：</label>#}

</div>
</form>
</body>
</html>

edit_student del_student

teacher_list :

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h3>老师列表</h3>
<div>
    <a href="/add_teacher/">添加</a>
</div>
<table>
    <tr>
        <th>ID</th>
        <th>老师姓名</th>
        <th>任教班级</th>
    </tr>
     {% for row in tea_list %}
    <tr>

            <td>{{ row.id }}</td>
            <td>{{ row.tname}}</td>
{#            <td>{{ row.c2t.all}}</td>#}
            <td>
                {% for i in row.c2t.all %}
                    {{ i.title }}
                    {% endfor %}
            </td>
            <td>
                <a href="/edit_teacher/{{ row.id }}/">编辑</a>
            </td>
    </tr>
    {% endfor %}

</table>
</body>
</html>

add_teacher:
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<h3>添加老师列表</h3>

<form method="POST" action="/add_teacher/">
    {% csrf_token %}
    <p>老师姓名：
        {{ obj.tname }}
    </p>
    <p>
        任教班级：
        {{ obj.xx }}
    </p>
    <p>
        <input type="submit" value="提交">
    </p>

</form>
</body>
</html>

teacher_list add_teacher

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h3>编辑老师信息</h3>
<form method="POST" action="/edit_teacher/{{ nid }}/">
{% csrf_token %}
 <p>老师姓名：
        {{ obj.tname }}
    </p>
    <p>
        任教班级：
        {{ obj.xx }}
    </p>
    <p>
        <input type="submit" value="提交">
    </p>

</form>
</body>
</html>

edit_teacher