rollback migration rails code example

Example 1: rails rollback multiple migrations

rake db:rollback STEP=n 
# n = how many migrations you want to rollback

Example 2: rails revert migration

rake db:rollback

Example 3: rails redo last migration

rake db:migrate:redo STEP=n

Example 4: rails db:rollback

rake db:rollback VERSION=n
# n = the version you want to rollback to