X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/3e9b6845d34f9cd80f9eb1099f76f7801bfae76f..c3453cf57df864b008dca6479f84504f81c0b131:/lib/diff_reader.rb

diff --git a/lib/diff_reader.rb b/lib/diff_reader.rb
index be48f8b4e..9b3e01b86 100644
--- a/lib/diff_reader.rb
+++ b/lib/diff_reader.rb
@@ -104,7 +104,7 @@ class DiffReader
 
     # take the first element and check that it is an osmChange element
     @reader.read
-    raise APIBadUserInput.new("Document element should be 'osmChange'.") if @reader.name != 'osmChange'
+    raise OSM::APIBadUserInput.new("Document element should be 'osmChange'.") if @reader.name != 'osmChange'
 
     result = OSM::API.new.get_xml_doc
     result.root.name = "diffResult"
@@ -156,19 +156,21 @@ class DiffReader
 
           # if the ID is a placeholder then map it to the real ID
           model_sym = model.to_s.downcase.to_sym
-          is_placeholder = ids[model_sym].include? new.id
-          id = is_placeholder ? ids[model_sym][new.id] : new.id
+          client_id = new.id
+          is_placeholder = ids[model_sym].include? client_id
+          id = is_placeholder ? ids[model_sym][client_id] : client_id
 
           # and the old one from the database
           old = model.find(id)
 
+          # translate any placeholder IDs to their true IDs.
           new.fix_placeholders!(ids)
+          new.id = id
+
           old.update_from(new, @changeset.user)
 
           xml_result = XML::Node.new model.to_s.downcase
-          # oh, the irony... the "new" element actually contains the "old" ID
-          # a better name would have been client/server, but anyway...
-          xml_result["old_id"] = new.id.to_s
+          xml_result["old_id"] = client_id.to_s
           xml_result["new_id"] = id.to_s 
           # version is updated in "old" through the update, so we must not
           # return new.version here but old.version!
@@ -183,7 +185,7 @@ class DiffReader
           # delete doesn't have to contain a full payload, according to
           # the wiki docs, so we just extract the things we need.
           new_id = xml['id'].to_i
-          raise API::APIBadXMLError.new(model, xml, "ID attribute is required") if new_id.nil?
+          raise OSM::APIBadXMLError.new(model, xml, "ID attribute is required") if new_id.nil?
 
           # if the ID is a placeholder then map it to the real ID
           model_sym = model.to_s.downcase.to_sym