一完成登录校验装饰器
1先把装饰器的架子搭起来：
外侧check_login接收的参数fn，其实是内侧的def warp()，因为内测的这个函数返回值就是fn
#装饰器架子固定写法：
def check_login(fn):
def warp(request,*args,**kwargs):
return fn(request,*args,**kwargs)
return warp
2给装饰器架子添肉，完成登录状态装饰器的编写：
如果username和uid都不在session里，那么就从cookies里获取这两个值，如果这两个值还不存在就304跳转到登录页面，如果cookie里有这两个值就回写session
#校验登录状态装饰器：
def check_login(fn):
def warp(request,*args,**kwargs):
if 'username' not in request.session or 'uid' not in request.session:
#检查cookies
c_username = request.COOKIES.get('username')
c_uid = request.COOKIES.get('uid')
if not c_username or not c_uid:
return HttpResponseRedirect('/user/login')
else:
#回写sessiom
request.session['username'] = c_username
request.session['uid'] = c_uid
return fn(request,*args,**kwargs)
return warp
二完成文章发布功能：
1创建应用：
D:\PycharmProjects\tyj_note>python manage.py startapp note
2注册应用：
INSTALLED_APPS = [
'note',
]
3编写文章模板：
from user.models import User
class Note(models.Model):
title = models.CharField('标题',max_length=100)
content = models.TextField('内容')
create_time = models.DateTimeField('创建时间',auto_now_add=True)
update_time = models.DateTimeField('更新时间',auto_now=True)
user = models.ForeignKey(User,on_delete=models.CASCADE)
4同步数据库：
D:\PycharmProjects\tyj_note>python manage.py makemigrations D:\PycharmProjects\tyj_note>python manage.py migrate
5编写视图
def add_note(request):
if request.method == 'GET':
return render(request,'note/add_note.html')
elif request.method == 'POST':
return HttpResponse('添加笔记成功')
6在note应用下创建templates/note/add_note.html
<body>
<form action="/note/add" method="post">
<p>
标题：<input type="text" name="title"> <input type="submit" value="保存">
</p>
<p>
<textarea cols="30" rows="10" name="content"></textarea>
</p>
</form>
</body>
7完成路由分发并浏览http://127.0.0.1:8000/note/add
#主路由
path('note/',include('note.urls')),
#子路由
from django.urls import path
from . import views
urlpatterns = [
path('add',views.add_note)
]
8完善文章发布的视图函数
@check_login
def add_note(request):
if request.method == 'GET':
return render(request, 'note/add_note.html')
elif request.method == 'POST':
uid = request.session['uid']
title = request.POST['title']
content = request.POST['content']
Note.objects.create(title=title,content=content,user_id=uid)
return HttpResponse('添加笔记成功')