Django 09 博客小案例

  urls.py

from django.urls import path
from . import views urlpatterns = [
path('index/',views.index,name='blog_index'),
path('add/',views.add,name='blog_add'),
path('list/',views.list,name='blog_list'),
path('detail/<blog_id>/',views.detail,name='blog_detail'),
path('edit/<blog_id>/',views.edit,name='blog_edit'),
path('delete/<blog_id>/',views.delete,name='blog_delete'),
]

  views.py

from django.shortcuts import render,redirect,reverse

# Create your views here.
from .models import Blog
from django.http import HttpResponse def index(request):
'''
主页
'''
return render(request,'blog/demo_index.html') def add(request):
'''
添加页
'''
if request.method == 'GET': #若未点击添加,则进入这个页面的时候method就是GET
return render(request,'blog/demo_add.html')
elif request.method == 'POST': #若点击添加,method变成POST,就可以获取POST中的添加信息(queryset)
title = request.POST.get('title') #赋值title
content = request.POST.get('content') #赋值content
if title == '' and content == '': #如果title和content都为空,则重新输入内容,不传入数据库
return redirect(reverse('blog_add'))
else: #否则传入数据库
blog=Blog(title=title,content=content)
blog.save()
return redirect(reverse('blog_add'))
else:
return HttpResponse('这不是一个有效的') def list(request):
'''
列表页
'''
blog_list = Blog.objects.all() #从数据库中获取表的所有数据
return render(request,'blog/demo_list.html',
context={'blog_list':blog_list, #传入模板
}) def detail(request,blog_id):
'''
详情页
'''
blog = Blog.objects.get(id=blog_id) #根据获取的id来查询这条数据
return render(request,'blog/demo_detail.html',
context={'blog':blog}) #传入模板 def edit(request,blog_id):
'''
修改页
'''
if request.method == 'GET': #如果为点击修改,method为GET
blog = Blog.objects.get(id = blog_id)
return render(request,'blog/demo_edit.html',
context={
'blog':blog, #将该页内容传入修改框内
})
elif request.method == 'POST': #若以点击修改,则method变为POST
content = request.POST.get('content') #获取POST中的content
title = request.POST.get('title') #获取POST中的title
if content == '' and title == '': #如果content和title同时为空,则不传入数据库
return render(request,'blog/demo_edit.html')
else: #否则,覆盖原内容,传入数据库
blog = Blog.objects.get(id = blog_id)
blog.title = title
blog.content = content
blog.save()
return redirect(reverse('blog_list'))
else:
return HttpResponse('这不是一个有效的') def delete(request,blog_id):
'''
删除页
'''
blog = Blog.objects.get(id=blog_id)
if blog: #如果blog存在,则删除
blog.delete()
return redirect(reverse('blog_list'))
else:
return HttpResponse('没有这篇博客')

  add模板(添加页)

{% extends 'blog/demo_base.html' %}
{% block title %}
添加博客
{% endblock %}
{% block bodyblock %}
<h1>添加新文章</h1>
<form action="" method="POST"> {% csrf_token %} <!csrf是为了防止跨域攻击的,加上就行;POST中存储你所输入的内容(title,content)>
标题<input type="text" autocomplete="off" id="title"
placeholder="请输入标题" name='title'> <br> <br><br>
内容 <textarea name="content" id="content"
placeholder="请输入内容" cols="30" rows="10"></textarea>
<button type="submit">发布博客</button>
</form>
{% endblock %}

  base模板(基页)

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>{% block title %} {% endblock %}</title>
</head>
<body>
{% block bodyblock %} {% endblock %} </body>
</html>

  detail模板(详情页)

{% extends 'blog/demo_base.html' %}
{% block title %}
文章详情
{% endblock %}
{% block bodyblock %}
<h1>文章标题:{{ blog.title }}</h1>
文章内容 <br>
{{ blog.content }}
{% endblock %}

  edit模板 (修改页)

{% extends 'blog/demo_base.html' %}
{% block title %}
修改博客
{% endblock %}
{% block bodyblock %}
<h1>修改文章</h1>
<form action="" method="POST"> {% csrf_token %}
标题<input type="text" autocomplete="off" id="title"
placeholder="请输入标题" name='title' value="{{ blog.title }}"> <br> <br><br> <! 原题目写在前面的value里面>
内容 <textarea name="content" id="content"
placeholder="请输入内容" cols="30" rows="10">{{ blog.content }}</textarea> <!原内容写在textarea标签内>
<button type="submit">修改博客</button>
</form>
{% endblock %}

  index模板(主页)

{% extends 'blog/demo_base.html' %}

{% block title %}
首页
{% endblock %} {% block bodyblock %}
<tr>
<td><a href="{% url 'blog_add' %}">添加文章</a></td> <!a标签实现跳转,url为前面add的name>
<td><a href="{% url 'blog_list' %}">文章列表</a></td>
</tr>
{% endblock %}

  list模板 (列表页)

{% extends 'blog/demo_base.html' %}
{% block title %}
文章列表
{% endblock %} {% block bodyblock %}
<h1 style="margin-left: 100px">文章列表</h1>
<table width="400px">
<thead style="font-size:20px">
<tr>
<th>标题</th>
<th>操作</th>
</tr>
</thead>
<tbody>
{% for blog in blog_list %}
<tr>
<th><a href="{% url 'blog_detail' blog.id %}">{{ blog.title }}</a></th> <!因为跳转的是指定的内容,所以必须加上blog.id>
<th><a href="{% url 'blog_edit' blog.id %}">编辑</a> |
<a href="{% url 'blog_delete' blog.id %}">删除 </a></th>
</tr>
{% endfor %} </tbody>
</table> {% endblock %}

  

05-11 21:45