version parent may not exist rather than a nil id #770

lib/tasks/seek_upgrades.rake

@@ -125,7 +125,7 @@ namespace :seek do
     puts "... Setting version visibility..."
     disable_authorization_checks do
       [DataFile::Version, Document::Version, Model::Version, Node::Version, Presentation::Version, Sop::Version, Workflow::Version].each do |klass|
-        scope = klass.where(visibility: nil).where.not(parent:nil)
+        scope = klass.where(visibility: nil)
         count = scope.count
         if count == 0
           puts "  No #{klass.name} with unset visibility found, skipping"
@@ -137,6 +137,7 @@ namespace :seek do
         check_doi = klass.attribute_method?(:doi)
         # Go through all versions and set the "latest" versions to publicly visible
         scope.find_each do |version|
+          next if version.parent.nil?
           if version.latest_version? || check_doi && version.doi.present?
             version.update_column(:visibility, Seek::ExplicitVersioning::VISIBILITY_INV[:public])
           else