How to ignore a table/class in EF 4.3 migrations

Question

I\'m testing with EF 4.3 (beta)

I have some new classes which should generate db tables and columns.

From a old project i have some old tables in my schema,

Answer 1

The correct workflow in this case is creating first migration prior to adding changes (new classes), than adding new classes and after that creating new migration where you will have only new tables.

If you didn't use migrations so far the framework will generate migrations for all tables you have in the project because it believes you are creating initial migration. Once you have migration generated you can modify its source file and remove CreateTable code for old classes from Up method. The problem is you will probably have to do this in any subsequent migration.

Edit: I wrote a walkthrough for adding migrations to existing project with EF 4.3.1