.delete all

If you need to delete a lot of records quickly, ActiveRecord gives .delete_all method. to be called directly on a model, to delete all records in that table, or a collection. Beware though, as .delete_all does not instantiate any object hence does not provide any callback (before_* and after_destroy don’t get triggered).

User.delete_all
#=> 39  <-- .delete_all return the number of rows deleted

User.where(name: "John").delete_all