问题描述
当我运行 python manage.py migration --fake photos zero 时:
运行上述命令后，我在该错误发生时运行了 python manage.py migration .
After running above command, I ran python manage.py migrate at that time this error occurred.
文件"C:\ Users ... \ lib \ site-packages \ django \ db \ backends \ sqlite3 \ base.py"，执行中的第411行返回Database.Cursor.execute(自己，查询)
File"C:\Users...\lib\site-packages\django\db\backends\sqlite3\base.py",line 411, in executereturn Database.Cursor.execute(self, query)
当我运行 python manage.py migration --fake photos :
运行上述命令后，我运行了 python manage.py migration ，并且运行良好.
After running above command, I ran python manage.py migrate and this work perfectly.
Running migrations:
Applying photos.0003_auto_20210303_0123... OK
所以我的问题是 python manage.py migration --fake< appname> 与 python manage.py migration --fake< appname>和之间有什么区别?零，为什么第一个命令会向我抛出错误?
So my question is that what difference between python manage.py migrate --fake <appname> vs python manage.py migrate --fake <appname> zero and Why first command throws me an error?
谢谢..
推荐答案
您似乎对-fake 标志有误解.根据文档 -假标志:
You appear to have a misunderstanding about the --fake flag. According to the documentation the --fake flag:
它还进一步指出，它是供高级用户手动进行更改的.基本上，Django创建一个表 django_migrations 来管理您的迁移.它将添加一个条目以标记是否已应用迁移.-fake 的作用只是根据您指定的迁移在此表中添加条目/从该表中删除条目.同样， zero 表示撤消所有迁移.
It also further states that it is meant for advanced users if they are making changes manually. Basically Django makes a table django_migrations to manage your migrations. It adds an entry to it to mark if a migration has been applied. What --fake does is simply add / remove the entries to / from this table according to the migration you specify. Also the zero means to undo all migrations.
python manage.py migrate --fake photos zero
上面的命令意味着您基本上是对Django说:
The above command means you basically say to Django:
python manage.py migrate --fake <appname>
在上面的命令中，您没有指定迁移(在先前，您指定为零)，这意味着假设您的意思是直到最近的迁移.基本上使用-fake ，此命令的意思是:
In the above command you don't specify the migration (in previous you specified zero), this means to assume that you mean till the most recent migration. Basically with --fake this command means:
据我了解，您仅作了一些更改，并想更新数据库，为此，您可以简单地编写:
From my understanding you only made some changes and wanted to update your database, for this you could have simply written:
python manage.py migrate
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