当进行数据库迁移的时候发生问题,报错如下:RuntimeError: Model class WH_auth.models.User doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS. 解决方法: -----在导入model模型的时候,加上app应用名 ok ,问题解决.…
中间件概述 中间件顾名思义,是介于request与response处理之间的一道处理过程,相对比较轻量级,并且在全局上改变django的输入与输出.因为改变的是全局,所以需要谨慎实用,用不好会影响到性能 Django中间件的定义: Middleware is a framework of hooks into Django’s request/response processing. It’s a light, low-level “plugin” system for globally alt…
A step-by-step tutorial for setting up and testing a standard Django formset. I’ve noticed on #django IRC that many people need guidance on formsets, and as I’ve now used them in a couple of my projects — most recently, Connect — I thought I could of…
一.什么是中间件 中间件顾名思义,是介于request与response处理之间的一道处理过程,相对比较轻量级,并且在全局上改变django的输入与输出.因为改变的是全局,所以需要谨慎实用,用不好会影响到性能 django中间价官网定义: Middleware is a framework of hooks into Django's request/response processing. It's a light, low-level "plugin" system for glo…
原文:http://bitworking.org/news/Why_so_many_Python_web_frameworks BitWorking This is Joe Gregorio's writings (archives), projects and status updates. Why so many Python web frameworks? 为什么这么多Python Web框架 When asked about the plethora of web frameworks…
一 什么是中间件 中间件顾名思义,是介于request与response处理之间的一道处理过程,相对比较轻量级,并且在全局上改变django的输入与输出.因为改变的是全局,所以需要谨慎实用,用不好会影响到性能 Django中间件的定义: Middleware is a framework of hooks into Django’s request/response processing. It’s a light, low-level “plugin” system for globally…
一 问题说明在创建Model的时候,如果存在类型是DateTimeField的字段,则在xadmin后端管理界面里,对该Model进行添加操作的时候,会报list index out of range. 这是上篇文章创建的Model: class IDC(models.Model): name = models.CharField(max_length=) contact = models.CharField(max_length=) phone = models.CharField(max_l…
bug one: You are trying to add a non-nullable field 'height' to person without a default; we can't do that (the database needs something to populate existing rows).Please select a fix: 1) Provide a one-off default now (will be set on all existing row…