ruby - Rails on Heroku, how do I populate DB using POST? -

ruby - Rails on Heroku, how do I populate DB using POST? -

i want populate info using rake db:seed. can run code fine. however, on local dev seed.rb file using:

app.post( uri.parse('/check_ins'), { "email" => "test@email.com" } )

on heroku, throws error:

nameerror: undefined local variable or method `app' main:object

i tried using net::http.post_form threw error:

nomethoderror: undefined method `request_uri'

ruby-on-rails ruby heroku