How to delete all data from all tables in Rails?

Question

I can do Post.delete_all to delete all my posts, but what if I want to delete all posts, comments, blogs, etc.?

How do I iterate over all my models and

Answer 1

This will work also for Rails 4

(ActiveRecord::Base.connection.tables - ['schema_migrations']).each do |table|
    table.classify.constantize.destroy_all
end