Django重新整理
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/bootstrap@3.3.7/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
#modelsclass Book(models.Model):nid=models.AutoField(primary_key=True)title=models.CharField(max_length=32)price=models.DecimalField(max_digits=8,decimal_places=2) # 999999.99pub_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.titleclass 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.nameclass 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.nameclass 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_pathfrom app01 import viewsurlpatterns = [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/bootstrap@3.3.7/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/bootstrap@3.3.7/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)
#urlspath('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"]=userelse: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>
转载于:https://www.cnblogs.com/lzqrkn/p/9982325.html
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