Declare api node ways as nested resources

app/controllers/api/nodes/ways_controller.rb

@@ -0,0 +1,25 @@
+module Api
+  module Nodes
+    class WaysController < ApiController
+      authorize_resource
+
+      before_action :set_request_formats
+
+      ##
+      # returns all the ways which are currently using the node given in the
+      # :node_id parameter. note that this used to return deleted ways as well, but
+      # this seemed not to be the expected behaviour, so it was removed.
+      def index
+        way_ids = WayNode.where(:node_id => params[:node_id]).collect { |ws| ws.id[0] }.uniq
+
+        @ways = Way.where(:id => way_ids, :visible => true)
+
+        # Render the result
+        respond_to do |format|
+          format.xml
+          format.json
+        end
+      end
+    end
+  end
+end