Cannot deploy rails Dynamic router on Heroku - ruby-on-rails

Question

I am doing a redirection based on a model attributes.
It works fine in local but Heroku send me a debug error when I push then finish deploy.
What is that wrong with my code below ? (from here)
2018-07-27T11:18:21.949383+00:00 app[web.1]: D, [2018-07-27T11:18:21.076083 #4] DEBUG -- : Passenger Load (1.3ms) SELECT "passengers".* FROM "passengers"
2018-07-27T11:18:21.949385+00:00 app[web.1]: Puma starting in single mode...
2018-07-27T11:18:21.949384+00:00 app[web.1]: D, [2018-07-27T11:18:21.893911 #4] DEBUG -- : Passenger Load (1.6ms) SELECT "passengers".* FROM "passengers"
2018-07-27T11:18:21.949393+00:00 app[web.1]: * Version 3.12.0 (ruby 2.4.1-p111), codename: Llamas in Pajamas
2018-07-27T11:18:21.949396+00:00 app[web.1]: * Environment: production
2018-07-27T11:18:21.949395+00:00 app[web.1]: * Min threads: 5, max threads: 5
2018-07-27T11:18:21.949532+00:00 app[web.1]: * Listening on tcp://0.0.0.0:50520
2018-07-27T11:18:21.950026+00:00 app[web.1]: Use Ctrl-C to stop
2018-07-27T11:18:22.440272+00:00 heroku[web.1]: State changed from starting to up
2018-07-27T11:21:16.609823+00:00 heroku[web.1]: Restarting
2018-07-27T11:21:16.610597+00:00 heroku[web.1]: State changed from up to starting
2018-07-27T11:21:17.485929+00:00 heroku[web.1]: Stopping all processes with SIGTERM
2018-07-27T11:21:17.501136+00:00 app[web.1]: - Gracefully stopping, waiting for requests to finish
2018-07-27T11:21:17.517026+00:00 app[web.1]: Exiting
2018-07-27T11:21:17.517896+00:00 app[web.1]: /app/vendor/bundle/ruby/2.4.0/gems/puma-3.12.0/lib/puma/server.rb:430:in `close': stream closed (IOError)
2018-07-27T11:21:17.517967+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.4.0/gems/puma-3.12.0/lib/puma/server.rb:433:in `handle_servers'
2018-07-27T11:21:17.517939+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.4.0/gems/puma-3.12.0/lib/puma/server.rb:430:in `ensure in handle_servers'
2018-07-27T11:21:17.517991+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.4.0/gems/puma-3.12.0/lib/puma/server.rb:358:in `block in run'
2018-07-27T11:21:17.608339+00:00 heroku[web.1]: Process exited with status 1
If I try to do a db:migrate it throws
ActiveRecord::StatementInvalid: PG::UndefinedTable: ERROR: relation "passengers" does not exist
LINE 1: SELECT "passengers".* FROM "passengers"
app/models/dynamic_router.rb which contains the faulty loop passenger.all.each do..end which is supposed to work ?
class DynamicRouter
def self.load
Rails.application.routes.draw do
# faulty part
Passenger.all.each do |pg|
get "/#{pg.shortcut}" => redirect("/users/sign_up?q=#{pg.id}&t=#{pg.token}")
end
#end of faulty part
end
end
def self.reload
Rails.application.routes_reloader.reload!
end
end
app/models/passenger.rb
after_save :reload_routes
def reload_routes
DynamicRouter.reload
end
config/routes.rb
Rails.application.routes.draw do
...
DynamicRouter.load
end

Answer 1

It was because Heroku do not accept database calls from route.config
Found the solution here
get ":shortcut" => redirect("/users/sign_up"), constraints: lambda { |request| Passenger.where(shortcut: request[:shortcut]).any? }