Question

Is it possible to alter tables in code-first migrations with nocheck constraints? I haven’t found any way to do this except of getting SQL script via Update-Database -Script and modifying the sql statements.

Answer 1

You can try creating your own MigrationSqlGenerator and use it with migrations (you can set custom SQL generator in DbMigrationsConfiguration) – I think it should be enough to inherit SqlServerMigrationSqlGenerator and add NOCHECK after adding foreign key = overriding Generate(AddForeignKeyIperation operation).

Anyway using NOCHECK with EF is way to disaster. If you want to have database without checked constraints don’t use EF because it will crash every time it reaches inconsistency.