如何在实体框架__MigrationHistory中添加新列（并填充它）

Question

I'm using Entity Framework 6, my case is very simple, I need to add a new column in the __MigrationHistory table that should have the datetime (like a timestamp) of the created date.

I read some examples where it says how to rename MigrationHistory or even rename the primary key column - this is not what I want, so please don't give me that example ( https://msdn.microsoft.com/en-us/data/dn456841.aspx )

I just need to add a createdDate column, and when you use update-database -script that new column should be equal to dateTime.now() .

Does anyone know how to achieve this?

Thanks!

Answer 1

The MigrationId column already as the datestamp of the migration creation.

MigrationId
201407221811141_InitTables

If you are trying to get the date of when the migration was applied you should be able to create a migration that runs a SQL script to add a column with a default value:

pseudo code:

Migration {
    Up() {
        SQL('Alter table __MigrationHistory add createdDate datetime')
        SQL('Alter table __MigrationHistory ADD CONSTRAINT CONSTRAINT_NAME DEFAULT GETDATE() FOR createdDate')
    }
}