Download Android App in your Android Device from Google Play Store
- Search for "Withoutbook Practice Exam Test" in Mobile/Tablet Play Store

Exams Attended

Mock Exams

Make Homepage

Bookmark this page

Subscribe Email Address

Ruby On Rails Interview Questions and Answers

Ques. How can you migrate your database schema one level down?

The rake tool does most of the migrations. 

It has this nifty syntax to go back one step:

rake db:rollback

If you want to rollback all the way to the beginning you would use:

rake db:reset

This would drop the database, recreate the Database and load the current schema into it

If you want to rollback multiple steps at the same time you would use:

rake db:rollback STEP=3

To rollback all the way and if you are not worried about losing the data then you can drop the database completely with purge like this:

rake db:purge
Is it helpful? Yes No

Most helpful rated by users:

©2020 WithoutBook