实体框架核心删除迁移问题
[英]Entity Framework Core remove-migration problem
问题描述
I have some changes to rescaffold my tables and create a migration named X . 
我进行了一些更改以重新折叠表并创建名为X的迁移。 I try to apply X via update-migration but I have an exception about some of default data. 我尝试通过update-migration应用X，但是我对某些默认数据有例外。 My X migration is not in __EFMigrationHistory table because of the exception. 由于异常，我的X迁移不在__EFMigrationHistory表中。 However, when I run remove-migration command to remove X migration, dotnet try to run Down function in X . 但是，当我运行remove-migration命令删除X迁移时，dotnet尝试在X运行Down函数。 I couldn't understand why this happened. 我不明白为什么会这样。 I want to use remove-migration because to edit ModelSnapshot.cs file is hard manually. 我要使用remove-migration因为手动编辑ModelSnapshot.cs文件很困难。 Is there anyone who knows the reason? 有谁知道原因吗？
1 个解决方案
解决方案1
0 2019-08-19 11:25:26
I've found a solution. 我找到了解决方案。 If the migration has a script related HasData function ( InsertData() , UpdateData() or DeleteData() , that causes a trouble when you want to run remove-migration. I uncommented those lines and removed the last migration successfully. 如果迁移具有脚本相关的HasData函数（ InsertData() ， UpdateData()或DeleteData() ，则在您要运行remove-migration时会引起麻烦。我取消注释了这些行，并成功删除了上一次迁移。
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