[RAILS] How to delete the wrong migration file

When I was working on an online school assignment, I accidentally made an extra migration. Even though it was working well, errors occurred frequently as a result of the migration. panic. I tried to rollback, but I couldn't do it well, so I decided to delete it this time.

First, check the migration status

Check the current migration status with rails db: migrate: status. As a result, it returned like this.

Status   Migration ID    Migration Name
   up     20201222113451  Devise create users
   up     20201223005506  Create items
   up     20201223093320  Add nickname to users
  down    20201223095940  Add devise to users

The bottom file is the database that has been added. It's down.

Delete migration!

rm -rf db/migrate/20201223095940_add_devise_to_users.rb

Then run rails db: migrate and run rails db: migrate: status again.

Cleanly deleted

 Status   Migration ID    Migration Name
   up     20201222113451  Devise create users
   up     20201223005506  Create items
   up     20201223093320  Add nickname to users

The last migration was deleted cleanly, and I was able to confirm the operation safely.


I think the pattern that caused the problem is different from this time, but I wrote a method to solve the migration problem using rollback.

-One case of solving a migration error in Rails

This time I deleted it and tried to deal with it. I still don't understand migration well in my head, but I would like to deepen it little by little. Thank you for the experience of our predecessors!


-[Rails] Delete migration file

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