Django学习笔记（2）-Toy模板网

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创建app

Django学习笔记（2）,web开发,django,学习,笔记,python,html
属于自动执行了python manage.py
直接在里面运行startapp app01就可以创建app01的项目了
之后在setting.py中注册app01

INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    'app01.apps.App01Config'
]

创建表

class Department(models.Model):
    """部门表"""
    id=models.BigAutoField(verbose_name="ID",primary_key=True)#系统默认自己创建
    title=models.CharField(verbose_name="标题（备注）",max_length=32)

class UserInfo(models.Model):
    name=models.CharField(verbose_name="姓名",max_length=16)
    password=models.CharField(verbose_name="密码",max_length=64)
    age=models.IntegerField(verbose_name="年龄")
    account=models.DecimalField(verbose_name="账户余额",max_digits=10,decimal_places=2,default=0)
    #10位数字，小数位是2
    create_time=models.DateTimeField(verbose_name="入职时间")
    #to表示与哪张表相连
    #to_fields表示与哪一列相连
    #写depart后Django会自动生成depart_id
    #on_delete=models.CASCADE级联删除
    #置空删除on_delete=models.SET_NULL
    depart=models.ForeignKey(to="Department",to_field="id",on_delete=models.CASCADE)

其中用户中加入部门数据，如果是正常开始用ID，对于特别大的公司用字符串名称，这样可以防止连表的时间消耗，属于用空间换时间。

Django学习笔记（2）,web开发,django,学习,笔记,python,html

部门列表

###前端页面
Django学习笔记（2）,web开发,django,学习,笔记,python,html

{% load static %}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="{% static 'plugins/bootstrap-3.4.1/css/bootstrap.min.css' %}">
    <style>
        .navbar{
            border-radius: 0;
        }
    </style>
</head>
<body>

<nav class="navbar navbar-default">
  <div class="container-fluid">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">联通用户管理系统</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li><a href="#">Link</a></li>
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#">Link</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">Action</a></li>
            <li><a href="#">Another action</a></li>
            <li><a href="#">Something else here</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">Separated link</a></li>
          </ul>
        </li>
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>


<srcipt src="{% static 'js/jquery-3.6.0.min.js' %}"></srcipt>
<srcipt src="{% static 'plugins/bootstrap-3.4.1/js/bootstrap.min.js' %}"></srcipt>
</body>
</html>

上面的导航栏代码在导航栏代码中找到的，加入后修改成上面的部分，记得最上面加入{% load static %}。
Django学习笔记（2）,web开发,django,学习,笔记,python,html

<div>
    <div class="container">
        <div style = "margin-bottom: 10px">
            <a class="btn btn-primary" href="">新建部门</a>

        </div>

        <div class="panel panel-default">
      <!-- Default panel contents -->
      <div class="panel-heading">Panel heading</div>
      <!-- Table -->
      <table class="table table-bordered">
        <thead>
          <tr>
            <th>#</th>
            <th>First Name</th>
            <th>Last Name</th>
            <th>Username</th>
          </tr>
        </thead>
        <tbody>
          <tr>
            <th scope="row">1</th>
            <td>Mark</td>
            <td>Otto</td>
            <td>@mdo</td>
          </tr>
          <tr>
            <th scope="row">2</th>
            <td>Jacob</td>
            <td>Thornton</td>
            <td>@fat</td>
          </tr>
          <tr>
            <th scope="row">3</th>
            <td>Larry</td>
            <td>the Bird</td>
            <td>@twitter</td>
          </tr>
        </tbody>
      </table>
    </div>
    </div>
</div>

Django学习笔记（2）,web开发,django,学习,笔记,python,html

新增

在depart_list中增加跳转地址

<a class="btn btn-primary" href="/depart/add/" >
{#              target="_blank"  在新的页面产生#}
                <span class="glyphicon glyphicon-plus-sign" aria-hidden="true"></span>
                新建部门</a>

新建一个depart_add.html

{% load static %}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="{% static 'plugins/bootstrap-3.4.1/css/bootstrap.min.css' %}">
    <style>
        .navbar{
            border-radius: 0;
        }
    </style>
</head>
<body>
<nav class="navbar navbar-default">
  <div class="container"><!--改为居中-->
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">联通用户管理系统</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li><a href="/depart/list/">部门管理</a></li>
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#">登录</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">刘世鹏<span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">个人资料</a></li>
            <li><a href="#">我的信息</a></li>
            <li><a href="#">Something else here</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">注销</a></li>
          </ul>
        </li>
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>

<div>
    <div class="panel panel-default">
  <div class="panel-heading">
    <h3 class="panel-title">新建面板</h3>
  </div>
  <div class="panel-body">
      <form>
      <div class="form-group">
        <label for="exampleInputEmail1">标题</label>
        <input type="text" class="form-control" id="exampleInputEmail1" placeholder="标题" name="title">
      </div>
      <button type="submit" class="btn btn-primary">保存</button>
    </form>
      
  </div>
</div>
</div>
<srcipt src="{% static 'js/jquery-3.6.0.min.js' %}"></srcipt>
<srcipt src="{% static 'plugins/bootstrap-3.4.1/js/bootstrap.min.js' %}"></srcipt>
</body>
</html>

在表单中增加post修改的方式

<form method="post">
  {% csrf_token %}
  <div class="form-group">
    <label for="exampleInputEmail1">标题</label>
    <input type="text" class="form-control" id="exampleInputEmail1" placeholder="标题" name="title">
  </div>
  <button type="submit" class="btn btn-primary">保存</button>
</form>

添加后端代码

def depart_add(request):
    "'添加部门'"
    if request.method=="GET":
        return render(request,"depart_add.html")
    #获取post中的数据
    title=request.POST.get("title")
    models.Department.objects.create(title=title)

    return redirect("/depart/list")

修改部门

在urls.py中采用

    path("depart/<int:nid>/edit/",views.depart_edit)

的路径方法

def depart_edit(request,nid):
    if request.method=="GET":
        queryset=models.Department.objects.filter(id=nid)
        title=queryset.first().title
        return render(request,"depart_edit.html",{"title":title})
    title2=request.POST.get("title")
    models.Department.objects.filter(id=nid).update(title=title2)
    return redirect("/depart/list")

{% load static %}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="{% static 'plugins/bootstrap-3.4.1/css/bootstrap.min.css' %}">
    <style>
        .navbar{
            border-radius: 0;
        }
    </style>
</head>
<body>
<nav class="navbar navbar-default">
  <div class="container"><!--改为居中-->
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">联通用户管理系统</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li><a href="/depart/list">部门管理</a></li>
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#">登录</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">刘世鹏<span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">个人资料</a></li>
            <li><a href="#">我的信息</a></li>
            <li><a href="#">Something else here</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">注销</a></li>
          </ul>
        </li>
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>

<div>
    <div class="panel panel-default">
  <div class="panel-heading">
    <h3 class="panel-title">修改面板</h3>
  </div>
  <div class="panel-body">
      <form method="post">
          {% csrf_token %}
      <div class="form-group">
        <label for="exampleInputEmail1">标题
        </label>
        <input type="text" class="form-control" id="exampleInputEmail1" placeholder="标题" name="title" value="{{ title }}">
      </div>
      <button type="submit" class="btn btn-primary">保存</button>
    </form>

  </div>
</div>
</div>
<srcipt src="{% static 'js/jquery-3.6.0.min.js' %}"></srcipt>
<srcipt src="{% static 'plugins/bootstrap-3.4.1/js/bootstrap.min.js' %}"></srcipt>
</body>
</html>

模板继承

创建一个模板网页，把需要重复的部分放进模板layout.html中，使用{% block content %} {% endblock %}编写其他需要改写的地方，其中content是变量名

{% load static %}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="{% static 'plugins/bootstrap-3.4.1/css/bootstrap.min.css' %}">
    <style>
        .navbar{
            border-radius: 0;
        }
    </style>
</head>
<body>

<nav class="navbar navbar-default">
  <div class="container"><!--改为居中-->
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">联通用户管理系统</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li><a href="/depart/list">部门管理</a></li>
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#">登录</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">刘世鹏<span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">个人资料</a></li>
            <li><a href="#">我的信息</a></li>
            <li><a href="#">Something else here</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">注销</a></li>
          </ul>
        </li>
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>

<div>
    {%  block content %}

     {% endblock %}
</div>
<srcipt src="{% static 'js/jquery-3.6.0.min.js' %}"></srcipt>
<srcipt src="{% static 'plugins/bootstrap-3.4.1/js/bootstrap.min.js' %}"></srcipt>
</body>
</html>

例如编辑网页中更改成如下

{% extends "layout.html" %}

{% block content %}
    <div>
    <div class="panel panel-default">
  <div class="panel-heading">
    <h3 class="panel-title">修改面板</h3>
  </div>
  <div class="panel-body">
      <form method="post">
          {% csrf_token %}
      <div class="form-group">
        <label for="exampleInputEmail1">标题
        </label>
        <input type="text" class="form-control" id="exampleInputEmail1" placeholder="标题" name="title" value="{{ title }}">
      </div>
      <button type="submit" class="btn btn-primary">保存</button>
    </form>

  </div>
</div>
</div>

{% endblock %}

用户管理

在创建user_list.html后，在其中加入后端的数据，需要一些函数的支持，但是模板语法不支持函数（）的，所以需要进行省略括号的写法，但是对于一些传参的函数就需要进行改写

{{ obj.create_time|date:“Y-m-d H:i:s” }}是obj.create_time.strftime(‘%Y-%m-%d %H:%M:%S’)的改写

obj.get_gender_display（）在前端中的模板语法去掉括号就行了。

总体界面

{% extends "layout.html" %}

{% block content %}

<div>
    <div class="container">
        <div style = "margin-bottom: 10px">
            <a class="btn btn-primary" href="/user/add/" >
{#              target="_blank"  在新的页面产生#}
                <span class="glyphicon glyphicon-plus-sign" aria-hidden="true"></span>
                新建用户
            </a>
        </div>
        <div class="panel panel-default">
      <!-- Default panel contents -->
      <div class="panel-heading"><span class="glyphicon glyphicon-th-list" aria-hidden="true"> 用户管理</span></div>
      <!-- Table -->
      <table class="table table-bordered">
        <thead>
          <tr>
            <th>#</th>
            <th>ID</th>
            <th>姓名</th>
            <th>年龄</th>
           <th>工资</th>
           <th>入职时间</th>
           <th>性别</th>
           <th>部门</th>
              <th>操作</th>
          </tr>
        </thead>
        <tbody>
        {% for obj in queryset %}
        <tr>
            <th scope="row">{{ obj.id }}</th>
            <td>{{ obj.id }}</td>
            <td>{{ obj.name }}</td>
            <td>{{ obj.age }}</td>
            <td>{{ obj.account }}</td>
            <td>{{ obj.create_time|date:"Y-m-d" }}</td>
{#            obj.create_time.strftime('%Y-%m-%d %H:%M:%S')#}
            <td>{{ obj.get_gender_display }}
{#                模板语法中不能加括号，所以有函数的也不需要加括号#}
            </td>
            <td>{{ obj.depart.title }}</td>
            <td>
                <a class = "btn btn-primary btn-xs" href="/user/{{ obj.id }}/edit/">编辑</a>
                <a class = "btn btn-danger btn-xs" href="/user/delete/?nid={{ obj.id }}">删除</a>
            </td>
        </tr>
        {% endfor %}
        </tbody>
      </table>
    </div>
    </div>
</div>

{% endblock %}

后端

def user_list(request):
    queryset=models.UserInfo.objects.all()
    print(type(queryset))
    for obj in queryset:
        print(obj.name,obj.age,obj.account,obj.get_gender_display(),obj.password,obj.create_time.strftime('%Y-%m-%d %H:%M:%S'))
    return render(request,"user_list.html",{"queryset":queryset})

Django学习笔记（2）,web开发,django,学习,笔记,python,html

新建用户

传统方法

{% extends "layout.html" %}

{% block content %}
<div>
    <div class="panel panel-default">
  <div class="panel-heading">
    <h3 class="panel-title">新建面板</h3>
  </div>
  <div class="panel-body" >
      <form method="post">
          {% csrf_token %}
      <div class="form-group">
        <label>姓名
        </label>
        <input type="text" class="form-control" placeholder="姓名" name="name" >
          <label>年龄
         </label>
        <input type="text" class="form-control" placeholder="年龄" name="age" >
          <label>工资
          </label>
        <input type="text" class="form-control" placeholder="工资" name="account" >
          <label>性别
          </label>
        <input type="text" class="form-control" placeholder="性别" name="gender" >
          <label>所属部门ID
          </label>
        <input type="text" class="form-control" placeholder="所属部门ID" name="depart_id" >
          <label>密码
          </label>
        <input type="text" class="form-control" placeholder="密码" name="password" >
      </div>
      <button type="submit" class="btn btn-primary">保存</button>
    </form>

  </div>
</div>
</div>

{% endblock %}

def user_add(request):
    if request.method=="GET":
        return render(request,"user_add.html")
    name=request.POST.get("name")
    age = request.POST.get("age")
    account = request.POST.get("account")
    gender = request.POST.get("gender")
    depart_id = request.POST.get("depart_id")
    password = request.POST.get("password")
    create_time=time.strftime('%Y-%m-%d %H:%M:%S', time.localtime())
    models.UserInfo.objects.create(name=name,age=age,account=account,
                                   gender=gender,password=password,
                                   create_time=create_time,
                                   depart_id=depart_id)
    return redirect("/user/list/")

Django学习笔记（2）,web开发,django,学习,笔记,python,html

改进

用户提交的数据没有校验
错误的页面上应该有错误的提示
每一个字段都需要重写一遍
关联的数据需要手动展示在前端页面
采用Django组件
Form组件
ModelForm组件

ModelForm 组件

class UserModelForm(forms.ModelForm):
    class Meta:
        model=models.UserInfo
        fields=["name","age","account","gender","depart","password"]
def user_modelform_add(request):
    """modelForm版本的添加用户"""
    form=UserModelForm()
    return render(request,"user_add_modelform.html",{"form":form})

{% extends "layout.html" %}

{% block content %}
<div>
    <div class="panel panel-default">
  <div class="panel-heading">
    <h3 class="panel-title">新建面板</h3>
  </div>
  <div class="panel-body" >
      <form method="post">
          {% csrf_token %}
      {% for field in form %}
          {{ field.label }}:{{ field }}<br>
          {% endfor %}
      <button type="submit" class="btn btn-primary">保存</button>
    </form>

  </div>
</div>
</div>

{% endblock %}

Django学习笔记（2）,web开发,django,学习,笔记,python,html
但是其中部门是下面这样的

Django学习笔记（2）,web开发,django,学习,笔记,python,html
利用重写Department类的方法__str__()

class Department(models.Model):
    """部门表"""
    id=models.BigAutoField(verbose_name="ID",primary_key=True)#系统默认自己创建
    title=models.CharField(verbose_name="标题（备注）",max_length=32)
    def __str__(self):
        return self.title

Django学习笔记（2）,web开发,django,学习,笔记,python,html

{% extends "layout.html" %}

{% block content %}
<div>
    <div class="panel panel-default">
  <div class="panel-heading">
    <h3 class="panel-title">新建面板</h3>
  </div>
  <div class="panel-body" >
      <form method="post">
          {% csrf_token %}

      {% for field in form %}
          <div class="form-group">
         <label> {{ field.label }}
          </label>
          {{ field  }}
          </div>
          {% endfor %}

      <button type="submit" class="btn btn-primary">保存</button>
    </form>

  </div>
</div>
</div>

{% endblock %}

Django学习笔记（2）,web开发,django,学习,笔记,python,html

加上样式

class UserModelForm(forms.ModelForm):
    class Meta:
        model=models.UserInfo
        fields=["name","age","account","gender","depart","password","create_time"]
        # widgets={
        #     "name":forms.TextInput(attrs={"class":"form-control"}),
        #     "age": forms.TextInput(attrs={"class": "form-control"}),
        #     "account": forms.TextInput(attrs={"class": "form-control"}),
        #     "gender": forms.TextInput(attrs={"class": "form-control"}),
        #     "depart": forms.TextInput(attrs={"class": "form-control"}),
        # }
    def __init__(self,*args,**kwargs):
        super().__init__(*args,**kwargs)
        for name,field in self.fields.items():
            if name=="create_time":
                field.widget.attrs={"class":"form-control","value":time.strftime('%Y-%m-%d %H:%M:%S', time.localtime()),}
            else:
                field.widget.attrs={"class":"form-control","placeholder":field.label}

Django学习笔记（2）,web开发,django,学习,笔记,python,html

后端中进行保存

def user_modelform_add(request):
    """modelForm版本的添加用户"""
    if request.method=="GET":
        form=UserModelForm()
        return render(request,"user_add_modelform.html",{"form":form})
    #进行数据校验
    form=UserModelForm(data=request.POST)
    if form.is_valid():
        form.save()#将提交的数据自动保存
        print(form.cleaned_data)
        return redirect("/user/list/")
    else:
        print(form.errors)
        return render(request,"user_add_modelform.html",{"form":form})

在前端中加入{{ field.errors.0 }}可以显示错误信息
Django学习笔记（2）,web开发,django,学习,笔记,python,html
在setting.py中改成LANGUAGE_CODE = "zh-hans"便可以变成中文

Django学习笔记（2）,web开发,django,学习,笔记,python,html

编辑

def user_edit(request,nid):
    row_object = models.UserInfo.objects.filter(id=nid).first()
    if request.method=="GET":
        form=UserModelForm(instance=row_object)
        return render(request,"user_edit.html",{"form":form})
    form=UserModelForm(data=request.POST,instance=row_object)
    if form.is_valid():
        form.save()
        return redirect("/user/list/")
    return render(request, "user_edit.html", {"form": form})

{% extends "layout.html" %}

{% block content %}
<div class="container">
<div>
    <div class="panel panel-default">
  <div class="panel-heading">
    <h3 class="panel-title">新建面板</h3>
  </div>
  <div class="panel-body" >
      <form method="post" novalidate>
          {% csrf_token %}

      {% for field in form %}
          <div class="form-group">
         <label> {{ field.label }}
          </label>
          {{ field  }}
              <span style="color: red">{{ field.errors.0 }}</span>

          </div>
          {% endfor %}

      <button type="submit" class="btn btn-primary">保存</button>
    </form>

  </div>
</div>
</div>

</div>
{% endblock %}

Django学习笔记（2）,web开发,django,学习,笔记,python,html 文章来源地址https://www.toymoban.com/news/detail-656189.html

删除

def user_delete(request):
    nid=request.GET.get("nid")
    models.UserInfo.objects.filter(id=nid).delete()
    return redirect("/user/list/")

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Django学习笔记（2）

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