update-database not working in Code first

Question

I am using entity framework and Codefirst to create a Stored procedure. As I reed, we should do some steps in package manager to create SP.

1 - enable migration

2- add-migration MYclass

3- update-database

and in Myclass(new created) I write my SP code in UP() method to create SP. works fine!! BUT when I change SP and run update-database again it does not work and I need to do another add-migration command to create new MYclass2. Is that right? I mean every time I should write add-migration?

this is mycode

  public override void Up()
        {
            Sql(@"Create procedure testSp 
                        as 
select std.Id as stdName, std.Name as MajorName, mj.Name from dbo.Students as std
inner join dbo.Majors as mj on std.Id = mj.Id
");
        }

        public override void Down()
        {
            Sql("drop procedure testSp");
        }

when I run update-database again the result is "No pending explicit migration"

even if I change the SQL query to "Alter procedure...." it does not work , no change happens. thanks

EDITED

consider this scenario, I want to change my SP name(just an example) so I need to change the query to "Alter store procedure tespSP2 ..." or any other change, should I run add-migration again?? or update-database is supposed to do it??

Answer 1

in entity framework migrations added to a _migrationHistory table, you can delete the last row of this table [it's not recommended]

or you can use rollback/undo command

Update-Database -TargetMigration:MigrationsName

then use update-database -force