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

rails db:purge

has recently been added to ActiveRecord in the master branch of rails 4.2.0.alpha

https://github.com/rails/rails/commit/e2f232aba15937a4b9d14bd91e0392c6d55be58d