Can Entity Framework 6 migrations include a transaction around scripts?

Question

Very simple question, i am using migrations in entity framework 6, and like the command

update-database -script

But is there a way of generating the script but have it wrapped with a transaction?

Problem is that if the script fails, i have to unpick it

Answer 1

This is what I'm using only on release mode to generate the scripts:

public class MigrationScriptBuilder : SqlServerMigrationSqlGenerator
{
#if !DEBUG
    protected override void Generate(SqlOperation sqlOperation)
    {
        Statement("GO");

        base.Generate(sqlOperation);

        Statement("GO");
    }

    public override IEnumerable<MigrationStatement> Generate(IEnumerable<MigrationOperation> migrationOperations, string providerManifestToken)
    {
        yield return new MigrationStatement {Sql = "BEGIN TRAN"};

        foreach (var migrationStatement in base.Generate(migrationOperations, providerManifestToken))
        {
            yield return migrationStatement;
        }

        yield return new MigrationStatement {Sql = "COMMIT TRAN"};
    }
#endif
}

You should wire that in your DatabaseMigrationsConfiguration. Example:

public sealed class DatabaseMigrationsConfiguration : DbMigrationsConfiguration<DatabaseContext>
{
    public DatabaseMigrationsConfiguration()
    {
        SetSqlGenerator("System.Data.SqlClient", new MigrationScriptBuilder());
    }
}