UrlGenerationError: No route matches, missing required keys and link_to - ruby-on-rails

Question

I'm having issues with my static pages strategy on rails.
I have a controller that handles static pages. Basically, it reads templates in the app/views/static directory and render as asked. Like so:
class StaticController < ApplicationController
def show
templ = File.join(params[:controller], params[:page])
puts params, templ
render templ
rescue ActionView::MissingTemplate => e
if e.message =~ %r{Missing template #{templ}}
raise ActionController::RoutingError, 'Not Found'
else
raise e
end
end
end
These are my routes:
Rails.application.routes.draw do
root 'static#show', page: 'home'
get ':page', to: 'static#show', as: :static, constraints: { page: /a-zA-Z\-_\/+/ }
end
The root route works fine, I am able to access the view just fine. I get no errors.
Now, on my header partial, I have this, edited for simplicity/relevance:
<%= link_to('Home', static_path(:home)) %>
There is no other ruby code in the partial or the main template. I'm not sure what I'm doing wrong. The error just does NOT make sense.
ActionController::UrlGenerationError - No route matches {:action=>"show", :controller=>"static", :format=>nil, :page=>:home} missing required keys: [:page]
Where exactly is the required key missing from? I don't have any objects other or models.
Now this works just fine:
<%= link_to('Home', controller: 'static', action: 'show', page: 'home') %>
So how do I make static_path work like that?
Thanks.

Answer 1

I think there's a problem with the regexp your using for the constraint, I'd suggest dropping it from the route definition, as you already check if template is present in the controller.
Also, you should check out high_voltage gem which handles creating static pages quite nicely.

Answer 2

My first guess would be:
<%= link_to 'Home', static_path("home") %> #-> try passing a string, rather than symbol
This should allow you to reference the required path
--
class StaticController < ApplicationController
def show
templ = File.join(params[:controller], params[:page])
puts params, templ
render templ
rescue ActionView::MissingTemplate => e
if e.message =~ %r{Missing template #{templ}}
raise ActionController::RoutingError, 'Not Found'
else
raise e
end
end
end
I would personally make this a lot simpler:
class StaticController < ApplicationController
def show
render "pages#{params[:page]}
end
end