如何从头删除和重新创建一个现有的EF代码第一个数据库 [英] How to delete and recreate from scratch an existing EF Code first database
问题描述
我想删除并重新创建我的x.mdb。
更新历史似乎不同步。如果我在我的上下文中注释掉我所有的DBSets,update-database就没有错误地运行,但在DB中留下了一些表。由于我在DB中没有有价值的数据,所以似乎最简单的重置所有的东西。
如何完成这个?
Thx提前
如果我理解正确...
如果您想要开始清理
:
1)手动删除你的Db - 无论它在哪里(我假设你有你的连接排序),或空,它更容易/更安全地删除它在一起 - 因为有 system __MigrationHistory
table - 你也需要删除它。
2)删除所有迁移文件
- 位于迁移
- 并命名为数字等 - 全部删除,
3)重建您的项目包含迁移(和其他) - 并确保您的项目设置(配置)自动构建(有时可能会导致问题 - 但不太可能),
4 )再次运行添加迁移初始
- 然后更新数据库
I am using EF Code First with EF 5 in VS 2012. I use PM update-database command and I have a simple seed method to fill some tables with sample data.
I would like to delete and recreate my x.mdb. The update history seems to be out of sync. If I comment out all my DBSets in my context, update-database run with no error but leaves some tables in the DB. As I have no valuable data in the DB it seems to the simplest to reset the all thing.
How can I accomplish this?
Thx in advance
If I'm understanding it right...
If you want to start clean
:
1) Manually delete your Db - wherever it is (I'm assuming you have your connection sorted), or empty it, but easier/safer is to delete it all together - as there is system __MigrationHistory
table - you need that removed too.
2) Remove all migration files
- which are under Migrations
- and named like numbers etc. - remove them all,
3) Rebuild your project containing migrations (and the rest) - and make sure your project is set up (configuration) to build automatically (that sometimes may cause problems - but not likely for you),
4) Run Add-Migration Initial
again - then Update-Database
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