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| author | Aditya Kapoor <aditya.kapoor@vinsol.com> | 2014-08-21 01:01:45 +0530 |
|---|---|---|
| committer | Aditya Kapoor <aditya.kapoor@vinsol.com> | 2014-08-21 01:01:45 +0530 |
| commit | eb9f1ef84f5236c6a1d4d46d372bf8fe6e2fff58 (patch) | |
| tree | c620fd93d4287a4276c2da58d1159a4eb7516f30 /activerecord | |
| parent | 2b7d67d49df8b88ef4815199f2ce5c11f09fe06f (diff) | |
| download | rails-eb9f1ef84f5236c6a1d4d46d372bf8fe6e2fff58.tar.gz rails-eb9f1ef84f5236c6a1d4d46d372bf8fe6e2fff58.tar.bz2 rails-eb9f1ef84f5236c6a1d4d46d372bf8fe6e2fff58.zip | |
[ci skip] add doc for STEP in migration
Diffstat (limited to 'activerecord')
| -rw-r--r-- | activerecord/lib/active_record/migration.rb | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb index 9219d70c65..d0d9304a36 100644 --- a/activerecord/lib/active_record/migration.rb +++ b/activerecord/lib/active_record/migration.rb @@ -181,9 +181,12 @@ module ActiveRecord # # To roll the database back to a previous migration version, use # <tt>rake db:migrate VERSION=X</tt> where <tt>X</tt> is the version to which - # you wish to downgrade. If any of the migrations throw an - # <tt>ActiveRecord::IrreversibleMigration</tt> exception, that step will fail and you'll - # have some manual work to do. + # you wish to downgrade. Alternatively, you can also use the STEP option if you + # wish to rollback last few migrations. <tt>rake db:migrate STEP=2</tt> will rollback + # the latest two migrations. + # + # If any of the migrations throw an <tt>ActiveRecord::IrreversibleMigration</tt> exception, + # that step will fail and you'll have some manual work to do. # # == Database support # |