今天小编就为大家分享一篇django 在原有表格添加或删除字段的实例，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧

一、如果models.py文件为时： timestamp = models.DateTimeField('保存日期') 会提示： (env8) D:\Desktop\env8\scr ipts\mysite>python manage.py makemigrations You are trying to add a non-nullable field 'timestamp' to article without a defa ult; we can't do that (the d