X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/136c5a7bf1e850d188a86cfe65ace4c4c457fcb8..dc2a95903722644f6109244cec9a2d1e195fef0e:/app/models/way.rb

diff --git a/app/models/way.rb b/app/models/way.rb
index 1304d8a18..b413ccb28 100644
--- a/app/models/way.rb
+++ b/app/models/way.rb
@@ -299,4 +299,21 @@ class Way < ActiveRecord::Base
   def tags_as_hash
     return self.tags
   end
+
+  ##
+  # if any referenced nodes are placeholder IDs (i.e: are negative) then
+  # this calling this method will fix them using the map from placeholders 
+  # to IDs +id_map+. 
+  def fix_placeholders!(id_map)
+    self.nds.map! do |node_id|
+      if node_id < 0
+        new_id = id_map[:node][node_id]
+        raise "invalid placeholder for #{node_id.inspect}: #{new_id.inspect}" if new_id.nil?
+        new_id
+      else
+        node_id
+      end
+    end
+  end
+
 end