How to Destroy multiple objects simultaneously in Rails 3

Question

I have a Rails application that is trying to delete multiple objects at a time.

I have tried like sending set of id seperated by \',\' to rails destroy method,but it

Answer 1

Model.delete([1,2,5,6]) 

or

Model.delete_all(["col_name in (?)", [1,2,5,6]])

Just pass the ids array