How to delete migration files in Rails 3

Question

I would like to remove/delete a migration file. How would I go about doing that? I know there are similar questions on here but as an update, is there a better way than doin

Answer 1

Sometimes I found myself deleting the migration file and then deleting the corresponding entry on the table schema_migrations from the database. Not pretty but it works.

Answer 2

Look at 4.1 Rolling Back

http://guides.rubyonrails.org/migrations.html

$ rake db:rollback

Answer 3

I just had this same problem:

1. rails d migration fuu -this deleted the migration with the last timestamp
2. rails d migration fuu -this deleted the other migration
3. use git status to check that is not on the untracked files anymore
4. rails g migration fuu

That fixed it for me

Answer 4

I usually:

1. Perform a rake db:migrate VERSION=XXX on all environments, to the version before the one I want to delete.
2. Delete the migration file manually.
3. If there are pending migrations (i.e., the migration I removed was not the last one), I just perform a new rake db:migrate again.

If your application is already on production or staging, it's safer to just write another migration that destroys your table or columns.

Another great reference for migrations is: http://guides.rubyonrails.org/migrations.html

Answer 5

Side Note: Starting at rails 5.0.0 rake has been changed to rails So perform the following

rails db:migrate VERSION=0

Answer 6

We can use,

$ rails d migration table_name  

Which will delete the migration.