chapter 11 细节
目录
11.1 用户退出当前登录，并回到首页
11.2 index 前端页面配置
11.3
11.4全局 404， 500页面配置
11.1 用户退出当前登录，并回到首页
后台代码
user.views.py
from django.urls import reverse
from django.http import HttpResponse,HttpResponseRedirect
class LogoutView(View):
def get(self,request):
Logout(request)#退出登陆
'''
重定向到首页
HttpResponseRedirect 是网页重定向
reverse（from django.urls import reverse）将网页名称反解成网页地址
'''
return HttpResponseRedirect(reverse('index'))urls.py
path('logout/',LogoutView.as_view(), name="logout"),#退出登录11.11修改当前页面数据：将所有页面的跳转链接，click-nums,fav-nums,等数据配置好
配置课程数据信息
class CourseDetail(View):
def get(self,request,course_id):
course = Course.objects.get(id = int(course_id))
course.click_nums+=1
fav_count = UserFavorate.objects.filter(fav_type = 1,fav_id=course_id ).count()#当前课程的被收藏次数
course.fav_nums = fav_count
'''
#当前课程的学习人数
'''
count = 0
student_nums = UserCourse.objects.all()
for student in student_nums:
if student.course.id == course_id:
count +=1
course.student = count
course.save()#记录点击课程的次数
course_has_fav = False
org_has_fav = False
if request.user.is_authenticated:
username = request.user
user = UserProfile.objects.get(Q(username=username) | Q(email=username))
user_id = user.id
if UserFavorate.objects.filter(user_id=user_id, fav_id=course.id, fav_type=1):#从数据库中查询
course_has_fav = True
if UserFavorate.objects.filter(user_id = user_id ,fav_id = course.course_org.id,fav_type = 2):
org_has_fav = True
else:
username = '未登录，请点击登陆'
tag = course.tag
if tag:
relate_course = Course.objects.filter(tag = tag)
relate_course = relate_course.exclude(id = course.id)[:1]#將當前課程排除在推薦課程之外
else:
relate_course = []
return render(request,'course-detail.html',{
'course':course,
'username': username,
'relate_course':relate_course,
'course_has_fav':course_has_fav,
'org_has_fav':org_has_fav
})将用户消息置为已读，即进入message页面就代表用户消息已读（逻辑是不是太简单了一点，我以为还要写ajax）
class UserMsgView(LoginRequiredMixin,View):
def get(self,request):
all_messages = UserMessage.objects.filter(user = request.user.id)
all_unread = UserMessage.objects.filter(user = request.user.id,has_read = False)
for message in all_unread:
message.has_read = True
message.save()11.2 index 前端页面配置
后台代码
class IndexView(View):
def get(self,request):
course_banners = all_courses = Course.objects.all().order_by('-click_nums')[:2]
all_courses = Course.objects.all().order_by('-click_nums')[:6]
all_orgs = CourseOrg.objects.all().order_by('-click_nums')[:15]
banners = Banner.objects.all().order_by('index')[:5]#只要五张
return render(request,'index.html',{
'all_courses':all_courses,
'all_orgs':all_orgs,
'banners':banners,
'course_banners':course_banners
})首页的View进行了修改
path('', IndexView.as_view(), name="index"),#首页前端代码
重点代码：
{% for course in all_courses %}
{% for org in all_orgs %}
11.3
修改全局views.py中的 render的index页面，因为从其他地方登陆的首页，拿不到之前首页配置的代码
原代码
return render(request, "index.html", {'name': user_name})
修改后的代码
return HttpResponseRedirect(reverse('index'))
前端判断用户是否登陆
{% if request.user.is_authenticated %}
{% if request.user.is_authenticated %}
{% else %}
{% endif %}
11.4全局 404， 500页面配置
出错配置：
django.core.management.base.SystemCheckError: SystemCheckError: System check identified some issues:
ERRORS:
?: (staticfiles.E002) The STATICFILES_DIRS setting should not contain the STATIC_ROOT setting.
后台：
STATIC_URL = '/static/'
STATICFILES_DIRS = [os.path.join(BASE_DIR, "static"),]
#添加图片路径
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR,'media')
STATIC_ROOT = [os.path.join(BASE_DIR, "static"),]
这里的全局STATIC_ROOT和上面的STATICFILES_DIR重合了，所以就会出现这样的错
正确的全部配置
一、sitting里面的配置
1、将Debug = True 改为Debug= False
2、配置访问端口 ALLOWED_HOSTS = ['*']，当然还可以有其他的配置方式
3、STATIC_ROOT就不用配了，直接用STATICFILES_DIR[0],就OK了
二、工程文件下的urls.py
from .settings import MEDIA_ROOT,STATICFILES_DIRS
re_path(r'^static/(?P.*)$', serve, { 'document_root': STATICFILES_DIRS[0],}),#配置静态文件路径
在urls的最下面配置
#全局404，500页面配置
handler404 = 'users.views.page_not_found'
handler500 = 'users.views.page_error'
user.views.py
#全局404处理函数
def page_not_found(request):
from django.shortcuts import render_to_response
response = render_to_response('404.html',{})
response.status_code = 404
return response
#500处理页面
def page_error(request):
from django.shortcuts import render_to_response
response = render_to_response('500.html',{})
response.status_code = 500
return response
