X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/ec916b7429ec04731eb5c533c55915f627c9aa38..86b4d1bc2c05a68053c7485217144a7fcf8ef4e8:/lib/osm.rb

diff --git a/lib/osm.rb b/lib/osm.rb
index bd9351026..a8cb103d2 100644
--- a/lib/osm.rb
+++ b/lib/osm.rb
@@ -24,6 +24,15 @@ module OSM
   class APIAlreadyDeletedError < APIError
   end
 
+  # Raised when the provided version is not equal to the latest in the db.
+  class APIVersionMismatchError < APIError
+    def initialize(provided, latest)
+      @provided, @latest = provided, latest
+    end
+
+    attr_reader :provided, :latest
+  end
+
   # Helper methods for going to/from mercator and lat/lng.
   class Mercator
     include Math