Migrating without loosing data

Rails
1

I have already created a migration. It adds 5 columns. Now I edit
migration file and enter 2 more column.

How can I remigrate so that 2 new columns would be added without loosing
data with db:migrate:reset?

2

On Jul 4, 8:36 am, “Vapor …” [email protected]
wrote:

I have already created a migration. It adds 5 columns. Now I edit
migration file and enter 2 more column.

How can I remigrate so that 2 new columns would be added without loosing
data with db:migrate:reset?

You can’t (short of dumping the data first and loading it in
afterwards or something like that). You’d be better off adding a
second migration that adds the extra columns.

Fred

3

We have a policy of never ever editing migrrations, if you do, they
become useless…

On Jul 4, 9:02 am, Frederick C. [email protected]