1.母版的继承
#base
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
{% block title %}
<title>Title</title>
{% endblock %}
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<style>
*{
margin: 0;
padding: 0;
}
.header{
width: 100%;
height: 50px;
background-color: #369; }
</style>
</head>
<body>
<div class="header"></div> <div class="container">
<div class="row">
<div class="col-md-3">
{% block menu %}
<div class="panel panel-success">
<div class="panel-heading">Panel heading without title</div>
<div class="panel-body">
<p><a href="/index/">首页</a></p>
<p><a href="/order/">订单</a></p>
<p> <a href="/shopping_list/">商品列表</a></p>
</div>
</div>
{% endblock %}
</div>
<div class="col-md-9">
#注意 定义一个盒子：关键字：block 必须是这个字！！！后边加自己起的名字
#{%block content%}
{% block content %}
<h3>welcome!</h3> {% endblock content%}
</div>
</div>
</div> </body>
</html> #index,html
#必须是 extends 这个关键字 ，后边跟着继承的哪个页面
#{%extends "base.html"%}
{% extends "base.html" %}
{% block content %}
{{ block.super }}
<div class="jumbotron">
<h1>Hello, world!</h1>
<p>...</p>
<p><a class="btn btn-primary btn-lg" href="#" role="button">Learn more</a></p>
</div>
{% endblock %}
{% block title %}
<title>首页</title>
{% endblock %}2.orm小的项目整理
2.1新建的项目里先生成表
#models class Book(models.Model):
nid=models.AutoField(primary_key=True)
title=models.CharField(max_length=32)
price=models.DecimalField(max_digits=8,decimal_places=2) # 999999.99
pub_date=models.DateTimeField() # "2012-12-12"
publish=models.ForeignKey(to="Publish",on_delete=models.CASCADE) # 级联删除
authors=models.ManyToManyField(to="Author")
def __str__(self):
return self.title class Publish(models.Model):
nid = models.AutoField(primary_key=True)
name=models.CharField(max_length=32)
email=models.CharField(max_length=32)
def __str__(self):
return self.name class Author(models.Model):
nid = models.AutoField(primary_key=True)
name=models.CharField(max_length=32)
age=models.IntegerField()
email=models.CharField(max_length=32)
ad=models.OneToOneField(to="AuthorDetail",on_delete=models.CASCADE)
def __str__(self):
return self.name class AuthorDetail(models.Model):
addr=models.CharField(max_length=32)
tel=models.IntegerField()
#author=models.OneToOneField("Author",on_delete=models.CASCADE)
def __str__(self):
return self.addr
2.2进行数据库的迁移
2.3添加表里的数据，先从从表里添加数据，再从主表里添加数据，或者直接粗暴的在数据库里添加
2.4分配路由，写视图函数
#urls
from django.contrib import admin
from django.urls import path,re_path from app01 import views urlpatterns = [
path('admin/', admin.site.urls),
path("books/",views.book_view),
re_path("^$",views.book_view),
path("books/add/",views.book_add),
re_path("^books/edit/(?P<edit_book_id>\d+)$",views.book_edit),
re_path("^books/delete/(?P<del_book_id>\d+)$",views.book_del),
]
2.5函数
def book_view(request):
book_list=Book.objects.all()
return render(request,"book_view.html",{"book_list":book_list}) def book_add(request):
if request.method=="GET":
publish_list=Publish.objects.all()
author_list=Author.objects.all()
return render(request,"book_add.html",{"publish_list":publish_list,"author_list":author_list})
else:
title=request.POST.get("title")
price=request.POST.get("price")
pub_date=request.POST.get("pub_date")
publish_id=request.POST.get("publish_id")
authors=request.POST.getlist("authors")
print(request.POST)
print(authors) book=Book.objects.create(title=title,price=price,pub_date=pub_date,publish_id=publish_id)
book.authors.add(*authors)
return redirect("/books/") def book_edit(request,edit_book_id):
edit_book = Book.objects.filter(pk=edit_book_id).first()
if request.method=="GET":
publish_list = Publish.objects.all()
author_list = Author.objects.all()
return render(request,"book_edit.html",{"edit_book":edit_book,"publish_list":publish_list,"author_list":author_list}) else:
title = request.POST.get("title")
price = request.POST.get("price")
pub_date = request.POST.get("pub_date")
publish_id = request.POST.get("publish_id")
authors = request.POST.getlist("authors")
print(request.POST)
print(authors)
Book.objects.filter(pk=edit_book_id).update(title=title,price=price,pub_date=pub_date,publish_id=publish_id)
edit_book.authors.set(authors) return redirect("/books/") def book_del(request,del_book_id):
Book.objects.filter(pk=del_book_id).delete()
return redirect("/books/")
2.6 tmplates
#book_add.html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>Title</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"
integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> </head>
<body> <h3>添加书籍</h3>
<div class="container">
<div class="row">
<div class="col-md-6 col-md-offset-3">
<form action="" method="post">
{% csrf_token %}
<div class="form-group">
<label for="title">书籍名称</label>
<input class="form-control" type="text" name="title" id="title">
</div>
<div class="form-group">
<label for="price">价格</label>
<input class="form-control" type="text" name="price" id="price">
</div>
<div class="form-group">
<label for="pub_date">出版日期</label>
<input class="form-control" type="date" name="pub_date" id="pub_date">
</div>
<div class="form-group">
<label for="pub_date">出版社</label>
<select name="publish_id" id="" class="form-control">
{% for publish in publish_list %}
<option value="{{ publish.pk }}">{{ publish.name }}</option>
{% endfor %}
</select>
</div> <div class="form-group">
<label for="pub_date">作者</label>
<select name="authors" id="" class="form-control" multiple>
{% for author in author_list %}
<option value="{{ author.pk }}">{{ author.name }}</option>
{% endfor %}
</select>
</div> <input type="submit" value="提交" class="btn btn-default pull-right"> </form> </div>
</div>
</div> </body>
</html> #book_edit.html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>Title</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"
integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> </head>
<body> <h3>编辑书籍</h3>
<div class="container">
<div class="row">
<div class="col-md-6 col-md-offset-3">
<form action="" method="post">
{% csrf_token %}
<div class="form-group">
<label for="title">书籍名称</label>
<input class="form-control" value="{{ edit_book.title }}" type="text" name="title" id="title">
</div>
<div class="form-group">
<label for="price">价格</label>
<input class="form-control" value="{{ edit_book.price }}" type="text" name="price" id="price">
</div>
<div class="form-group">
<label for="pub_date">出版日期</label>
<input class="form-control" value="{{ edit_book.pub_date|date:'Y-m-d' }}" type="date" name="pub_date" id="pub_date">
</div>
<div class="form-group">
<label for="pub_date">出版社</label>
<select name="publish_id" id="" class="form-control">
{% for publish in publish_list %}
{% if edit_book.publish == publish %}
<option selected value="{{ publish.pk }}">{{ publish.name }}</option>
{% else %}
<option value="{{ publish.pk }}">{{ publish.name }}</option>
{% endif %}
{% endfor %} </select>
</div> <div class="form-group">
<label for="pub_date">作者</label>
<select name="authors" id="" class="form-control" multiple>
{% for author in author_list %}
{% if author in edit_book.authors.all %}
<option selected value="{{ author.pk }}">{{ author.name }}</option>
{% else %}
<option value="{{ author.pk }}">{{ author.name }}</option>
{% endif %}
{% endfor %}
</select>
</div> <input type="submit" value="提交" class="btn btn-default pull-right"> </form> </div>
</div>
</div> </body>
</html> #book_view.html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>Title</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="/static/bootstrap/css/bootstrap.css">
</head>
<body> <h3>查看书籍</h3>
<div class="container">
<div class="row">
<div class="col-md-8 col-md-offset-2">
<a href="/books/add/" class="btn btn-primary">添加书籍</a>
<table class="table table-bordered table-hover table-striped">
<thead>
<tr>
<th>编号</th>
<th>书籍名称</th>
<th>价格</th>
<th>出版日期</th>
<th>出版社</th>
<th>作者</th>
<th>操作</th>
</tr>
</thead>
<tbody>
{% for book in book_list %}
<tr>
<td>{{ forloop.counter }}</td>
<td>{{ book.title }}</td>
<td>{{ book.price }}</td>
<td>{{ book.pub_date|date:"Y-m-d" }}</td>
<td>{{ book.publish.name }}</td>
<td>
{% for author in book.authors.all %}
<span>{{ author.name }}</span>
{% if not forloop.last %}
,
{% endif %}
{% endfor %} </td> <td>
<a href="/books/delete/{{ book.pk }}" class="btn btn-danger btn-sm">删除</a>
<a href="/books/edit/{{ book.pk }}" class="btn btn-warning btn-sm">编辑</a>
</td>
</tr> {% endfor %} </tbody>
</table>
</div>
</div>
</div>
<script src="/static/js/jquery.js"></script>
<script>
$("h3").click(function () {
$(this).css("color","green")
})
</script>
</body>
</html>
3json模块
3.1json其实就是一个模块，把字符串类型的转换成我们想要的数据类型
d = {"name":"alex"}
print(type(d))
#<class 'dict'>
s = json.dumps(d)
print(type(s))
#<class 'str'>
#注意：json中的dumps是把其他数据类型转换成字符串数据类型
#注意：json中的loads是把字符串数据类型转换成原有的数据类型4.AJAX
4.1利用Ajax请求进行简单的求和（没有动态传参的Ajax）
#urls
path('index/', views.index),
#views中
def index(request):
return render(request,"index.html") #templayes中
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>Title</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="/static/js/jquery-3.3.js"></script>
</head>
<body> <h4>INDEX页面</h4>
<button class="btn">提交Ajax</button>
<p class="show"></p>
<hr>
{% csrf_token %}
<input type="text" id="num1"> + <input id="num2" type="text"> = <input id="ret" type="text"><button class="cal">计算</button> <script>
// 传参Ajax请求
$(".cal").click(function () {
var num1=$("#num1").val();
var num2=$("#num2").val();
$.ajax({
#返回的地址
url:"/cal/",
type:"post",
data:{
num1:num1,
num2:num2,
csrfmiddlewaretoken:$("[name='csrfmiddlewaretoken']").val()
},
success:function (response) {
console.log(response);
$("#ret").val(response)
}
})
})</script> </body> </html> #urls
path('cal/', views.cal),
#views中def cal(request):
num1=request.POST.get("num1")
num2=request.POST.get("num2")
ret=int(num1)+int(num2)
return HttpResponse(str(ret))
4.2利用Ajax进行登录
4.2.1分配路由写视图函数
def login(request):
if request.method == "POST":
res={"user":None,"error":""}
user=request.POST.get("user")
pwd=request.POST.get("pwd") user_obj=UserInfo.objects.filter(user=user,pwd=pwd).first()
if user_obj:
res["user"]=user
else:
res["error"]="用户名或者密码错误！"
return HttpResponse(json.dumps(res)) else:
return render(reqeust,"login.html") #templades中
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>Title</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="/static/js/jquery-3.3.js"></script> </head>
<body> <form>
用户名 <input type="text" id="user">
密码 <input type="password" id="pwd">
<input type="button" value="提交" id="login_btn"><span class="error"></span>
{% csrf_token %} </form> <script> $("#login_btn").click(function () { // 发送Ajax请求登录认证 $.ajax({
url:"/login/",
type:"post",
data:{
#date是客户端往服务器传过去的数据
user:$("#user").val(),
pwd:$("#pwd").val(),
csrfmiddlewaretoken:$("[name='csrfmiddlewaretoken']").val()
},
success:function (response) {
console.log(response); // json字符串
var res=JSON.parse(response);
console.log(res);
if (res.user){
// 登陆成功
location.href="/index/"
}else{
// 登录失败
$(".error").html(res.error).css("color","red");
setTimeout(function () {
$(".error").html("")
},1000)
} }
})
}) </script>
</body>
</html>