agungyuliaji · February 26, 2018 19:00 · Apr 19, 2013
diff --git a/routes_with_constraints.rake b/routes_with_constraints.rake
@@ -0,0 +1,44 @@
+namespace :routes do
+  desc 'Print out all defined routes in match order, with names, per constraint class. Target specific constraint class with CONSTRAINT=x. Target specific controller with CONTROLLER=x.'
+  task constrained: :environment do
+    Rails.application.reload_routes!
+
+    constraints_routes = Hash.new
+
+    Rails.application.routes.routes.each do |route|
+      group = (route.app.class == ActionDispatch::Routing::Mapper::Constraints ? route.app.send( :constraints ).first.to_s : 'No constraint class')
+      constraints_routes[group] ||= []
+      constraints_routes[group] << route
+    end
+
+    requested_constraint = ENV[ 'CONSTRAINT' ]
+
+    constraints_routes.each do |group, all_routes|
+      if requested_constraint.nil? or group == requested_constraint
+        puts "\n\nConstraint class : #{group}\n\n"
+
+        if ENV[ 'CONTROLLER' ]
+          all_routes = all_routes.select { |route| route.defaults[ :controller ] == ENV[ 'CONTROLLER' ] }
+        end
+
+        routes = all_routes.collect do |route|
+          reqs = route.requirements.dup
+          reqs[ :to ] = route.app unless route.app.class.name.to_s =~ /^ActionDispatch::Routing/
+          reqs = reqs.empty? ? '' : reqs.inspect
+
+          {name: route.name.to_s, verb: route.verb.source.gsub( /[\^\$]/, '' ), path: route.path, reqs: reqs}
+        end
+
+        routes.reject! { |r| r[ :path ].spec.to_s =~ %r{/rails/info/properties|/assets} } # Skip the route if it's internal route
+
+        name_width = routes.map { |r| r[ :name ].length }.max
+        verb_width = routes.map { |r| r[ :verb ].length }.max
+        path_width = routes.map { |r| r[ :path ].spec.to_s.length }.max
+
+        routes.each do |r|
+          puts "#{r[ :name] .rjust( name_width )} #{r[ :verb ].ljust( verb_width )} #{r[ :path ].spec.to_s.ljust( path_width )} #{r[ :reqs ]}"
+        end
+      end
+    end
+  end
+end