sqlite3.OperationalError: no such column: **

最近在《phthon 从入门到实战》在第19章第三部分，按照要求在models.py(learning_logs app 里面的)，添加了一行：owner=models.ForeignKey(User,on_delete=models.CASCADE)，即添加了用户的一个外键，在执行了makemigrations 后，sunsever 时出现了一个错误，如下：

无对应列owner_id，出现这个错误的原因是makemigrations 是告诉数据库添加了新列，但没有将改动应用于数据库，migrate则是将改动应用于数据库，关于makemigrations 和migrate 的区别，以下是摘自Moderator Chris Freeman的回答

"It is necessary to run both the commands to complete the migration of the database tables to be in sync with your models.

makemigrations simply analyzes your current models for any changes that would be out of sync with your database and creates a migrations file that can be used to bring the in sync. If left at this point, your models would still be out of sync with your database possibly breaking your code that queries the database.

migrate is the command to "Make It So!" and apply the changes noted during the makemigrations phase.

Applying [app] to either of these commands simply adds focus to that "app" and doesn't inspect all of your apps."

所以是忘了执行“migrate”,执行后错误消失。makemigrations、migrate 都是必要的。

sqlite3.OperationalError: no such column: **相关推荐

django.db.utils.OperationalError: no such column: catalogue_product.is_public
报错来自django-oscar从低版本向高版本迁移的时候发生的．完整报错如下: Traceback (most recent call last): File "/home/appl ...
python操作sqlite报错：sqlite3.OperationalError: unrecognized token: “630008.OF“
python操作sqlite报错:sqlite3.OperationalError: unrecognized token: "630008.OF" 分析:Ana:column的名 ...
解决 “OperationalError: (sqlite3.OperationalError) no such table: ...“问题
解决 "OperationalError: (sqlite3.OperationalError) no such table: ..."问题参考文章: (1)解决 "O ...
sqlite3.OperationalError: database is locked
情景描述 windows上代码文件,设置为共享目录,mount到linux使用.运行python manage.py migrate,出现错误报错 [root@localhost sqlalchem ...
python创建sqlite3 unicode error_python/sqlite3:发生异常:sqlite3.operationalerror
我正在尝试创建一个函数来处理API错误消息,但是我在python中得到了这个错误消息: Exception has occurred: sqlite3.OperationalError near &q ...
pymysql.err.OperationalError: (1054, “Unknown column ‘xxx‘ in ‘where clause‘“)问题解决方法
任务向mysql数据库用户表中加入用户头像图片,一般16M以下的图片类型选择MEDIUMBLOB即可. 遇到问题用pymysql向mysql插入图片数据时报错:pymysql.err.Operat ...
sqlite报错：sqlite3.OperationalError: near “updata“: syntax error
sqlite报错:sqlite3.OperationalError: near "updata": syntax error 在进行sqlite操作时,很容易因为看错或者手误造成报 ...
sqlite3.OperationalError: near “(“: syntax error
错误描述:sqlite3.OperationalError: near "(": syntax error 错误原因: Traceback (most recent call la ...
解决 pymysql.err.OperationalError: (1054, “Unknown column ‘xxx‘ in ‘where clause‘“)
解决 python 对mysql执行操作时报错: pymysql.err.OperationalError: (1054, "Unknown column 'xxx' in 'where c ...

sqlite3.OperationalError: no such column: **

sqlite3.OperationalError: no such column: **相关推荐

最新文章

热门文章