Ruby On Rails Interview Questions and Answers
Ques. How can you migrate your database schema one level down?Ans.
The rake tool does most of the migrations.
It has this nifty syntax to go back one step:
If you want to rollback all the way to the beginning you would use:
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:
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