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 (
after_destroy don't get triggered).
User.delete_all #=> 39 <-- .delete_all return the number of rows deleted User.where(name: "John").delete_all