gistfile1.txt

Works fine, no errors:

        Neo4j::Transaction.run do |tx|
          @publish_set.status = 'published'
        end

        Neo4j::Transaction.run do |tx|
          @publish_set.publish!(false)
        end

But if there's a transaction that doesn't modify anything:

        Neo4j::Transaction.run do |tx|
          puts "hello"
        end

        Neo4j::Transaction.run do |tx|
          @publish_set.publish!(false)
        end

The second transaction raises "NoMethodError: undefined method `_java_node' for nil:NilClass"