ruby on rails - How to map a subdomain to an existing controller action in localhost -

i want have sub domain particular route

   'product_list/home' 

previously url used localhost:3000/product_list/home. want url store.dev:3000/product_list/home

i have modified route this

 constraints subdomain: 'store'        'product_list/home'     end 

in /etc/hosts. have added store.dev follows

127.0.0.1   localhost 127.0.0.1   store.dev 

but when visited store.dev:3000 in dev environment, getting homepage localhost:3000.

but want restrict subdomain route product_list/home.

and 1 more problem facing

http://store.dev:3000/product_list/home when visit this

i getting

no route matches [get] "/product_list/home" 

update:

after changing entry in hosts file .. store.dev store.local.dev works able access store.local.dev:3000/product_list/home. problem able access other pages also, have about page. store.local.dev:3000/about, don't want happen. how restrict subdomain 1 particular route

your example , examples in other answers not using subdomains @ all: if @ domain name store.dev has no subdomain, store.dev top-level/root domain. example subdomain be: sub.store.dev

if change entry in /etc/hosts file store.dev store.local.dev code work.

update

to answer second part of question (restricting route root domain): can achieve wrapping routes should available on root domain in constraints block empty subdomain:

constraints subdomain: ''   '/about' end