Make code fail when Rails gem is updated

ee/app/models/geo/upload_registry.rb

@@ -3,6 +3,11 @@
 class Geo::UploadRegistry < Geo::FileRegistry
   belongs_to :upload, foreign_key: :file_id
 
+  if Rails.gem_version >= Gem::Version.new('6.0')
+    raise '.type_condition was changed in Rails 6.0, please adapt this code accordingly'
+    # see https://github.com/rails/rails/commit/6a1a1e66ea7a917942bd8369fa8dbfedce391dab
+  end
+
   def self.type_condition(table = arel_table)
     sti_column = arel_attribute(inheritance_column, table)
     sti_names  = Geo::FileService::DEFAULT_OBJECT_TYPES