Ruby On Rails Questions et reponses d'entretien
Question : How can you migrate your database schema one level down?Reponse :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 |
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