django自定义错误处理

要实现自定义错误处理的功能，总共分4步： 

1.创建html错误页 

2.配置settings ，当DEBUG=True，则不会生效

3.编写视图 

4.配置url

views.py
 
def page_not_found(request,exception):
    #404
    return render(request,"blog/404.html",status=404)

def page_error(exception):
    
    return render("blog/500.html",status=500)

def permission_denied(request,exception):
    #403
    return render(request, "blog/403.html",status=403)

def bad_request(request,exception):
    #400
    return render(request, "blog/400.html",status=400)

主程序下urls.pyhandler400 = views.bad_request
handler403 = views.permission_denied
handler404 = views.bad_request
handler500 = views.page_error

然后运行：

 过程中可能遇到的报错：

# ERRORS:?: (urls.E007) The custom handler500 view ‘blog.views.page_error‘ does not take the correct number of arguments (request).解决：视图函数中不要request参数

def page_error(exception):
    #500
    return render("blog/500.html")

# ERRORS:?: (urls.E007) The custom handler403 view ‘blog.views.permission_denied‘ does not take the correct number of arguments (request, exception).

 解决：视图函数中加上exception参数，虽然没什么用

def permission_denied(request,exception):
    #403
    return render(request, "blog/403.html")