Error: The path `/home/user/projects/rails_engine/vendor/engines/blorgh` does not exist.

I was learning how to create mountable engine from here http://guides.rubyonrails.org/engines.html ,
on this section

3.1 Generating a Post Resource

when i try to run rake db:migrate i got this error The path /home/user/projects/rails_engine/vendor/engines/blorgh does not exist.,

Please help me to address the issue.thanks in advance.