usar el nombre del sitio y no el hostname

app/controllers/api/v1/contact_controller.rb

@@ -64,9 +64,13 @@ module Api
         render html: body(:gave_consent), status: status
       end
 
+      def site_id
+        params[:site_id].gsub(/\.#{Site.domain}\z/, '')
+      end
+
       # Encuentra el sitio
       def site
-        @site ||= Site.find_by(name: params[:site_id])
+        @site ||= Site.find_by(name: site_id)
       end
 
       # Parámetros limpios

test/controllers/api/v1/contact_controller_test.rb

@@ -65,11 +65,15 @@ module Api
       end
 
       test 'enviar un mensaje genera correos' do
+        ActionMailer::Base.deliveries.clear
+
+        redirect = "#{@site.url}/?thanks"
+
         10.times do
           create :rol, site: @site
         end
 
-        post v1_site_contact_url(@site),
+        post v1_site_contact_url(site_id: @site.hostname),
              headers: {
                Origin: @site.url
              },
@@ -79,9 +83,11 @@ module Api
                contact: SecureRandom.hex,
                from: "#{SecureRandom.hex}@sutty.nl",
                body: SecureRandom.hex,
-               gdpr: true
+               gdpr: true,
+               redirect: redirect
              }
 
+        assert_equal redirect, response.headers['Location']
         assert_equal 2, ActionMailer::Base.deliveries.size
       end
     end