fixed "full" and "relationships_for_object" modes

app/controllers/relation_controller.rb

@@ -111,36 +111,73 @@ class RelationController < ApplicationController
     end
   end
 
+  # -----------------------------------------------------------------
+  # full
+  # 
+  # input parameters: id
+  #
+  # returns XML representation of one relation object plus all its
+  # members, plus all nodes part of member ways
+  # -----------------------------------------------------------------
   def full
     begin
       relation = Relation.find(params[:id])
 
       if relation.visible
-        # In future, we might want to do all the data fetch in one step
-        seg_ids = relation.segs + [-1]
-        segments = Segment.find_by_sql "select * from current_segments where visible = 1 and id IN (#{seg_ids.join(',')})"
 
-        node_ids = segments.collect {|segment| segment.node_a }
-        node_ids += segments.collect {|segment| segment.node_b }
-        node_ids += [-1]
-        nodes = Node.find(node_ids, :conditions => "visible = TRUE")
+        # first collect nodes, ways, and relations referenced by this relation.
+        
+        ways = Way.find_by_sql("select w.* from current_ways w,current_relation_members rm where "+
+            "rm.member_type='way' and rm.member_id=w.id and rm.id=#{relation.id}");
+        nodes = Node.find_by_sql("select n.* from current_nodes n,current_relation_members rm where "+
+            "rm.member_type='node' and rm.member_id=n.id and rm.id=#{relation.id}");
+        # note query is built to exclude self just in case.
+        relations = Relation.find_by_sql("select r.* from current_relations r,current_relation_members rm where "+
+            "rm.member_type='relation' and rm.member_id=r.id and rm.id=#{relation.id} and r.id<>rm.id");
 
-        # Render
+        # now additionally collect nodes referenced by ways. Note how we recursively 
+        # evaluate ways but NOT relations.
+
+        node_ids = nodes.collect {|node| node.id }
+        way_node_ids = ways.collect { |way|
+           way.way_nodes.collect { |way_node| way_node.node_id }
+        }
+        way_node_ids.flatten!
+        way_node_ids.uniq
+        way_node_ids -= node_ids
+        nodes += Node.find(way_node_ids)
+    
+        # create XML.
         doc = OSM::API.new.get_xml_doc
-        nodes.each do |node|
-          doc.root << node.to_xml_node()
-        end
-        segments.each do |segment|
-          doc.root << segment.to_xml_node()
-        end
-        doc.root << relation.to_xml_node()
+        user_display_name_cache = {}
 
+        nodes.each do |node|
+          if node.visible? # should be unnecessary if data is consistent.
+            doc.root << node.to_xml_node(user_display_name_cache)
+          end
+        end
+        ways.each do |way|
+          if way.visible? # should be unnecessary if data is consistent.
+            doc.root << way.to_xml_node(user_display_name_cache)
+          end
+        end
+        relations.each do |rel|
+          if rel.visible? # should be unnecessary if data is consistent.
+            doc.root << rel.to_xml_node(user_display_name_cache)
+          end
+        end
+        # finally add self and output
+        doc.root << relation.to_xml_node(user_display_name_cache)
         render :text => doc.to_s, :content_type => "text/xml"
+
       else
+
         render :nothing => true, :status => :gone
       end
+
     rescue ActiveRecord::RecordNotFound
       render :nothing => true, :status => :not_found
+
     rescue
       render :nothing => true, :status => :internal_server_error
     end
@@ -162,6 +199,16 @@ class RelationController < ApplicationController
     end
   end
 
+  def relations_for_way
+    relations_for_object("way")
+  end
+  def relations_for_node
+    relations_for_object("node")
+  end
+  def relations_for_relation
+    relations_for_object("relation")
+  end
+
   def relations_for_object(objtype)
     relationids = RelationMember.find(:all, :conditions => ['member_type=? and member_id=?', objtype, params[:id]]).collect { |ws| ws.id }.uniq
 
@@ -174,7 +221,7 @@ class RelationController < ApplicationController
 
       render :text => doc.to_s, :content_type => "text/xml"
     else
-      render :nothing => true, :status => :bad_request
+      render :nothing => true, :status => :not_found
     end
   end
 end