         let observer = Observer()
         dbQueue.add(transactionObserver: observer)
         
-        let artist = Artist(name: "Gerhard Richter")
+        let artist = Artist(id: nil, name: "Gerhard Richter")
         
         try dbQueue.inDatabase { db in
             observer.resetCounts()

        dbQueue.add(transactionObserver: observer)
        
        try dbQueue.inDatabase { db in
            let artist = Artist(name: "Gerhard Richter")
            
            //
            try artist.save(db)

            dbQueue.add(transactionObserver: observer)
            
            try dbQueue.inTransaction { db in
                let artist = Artist(id: nil, name: "Gerhard Richter")
                try artist.insert(db)
                try artist.update(db)
                try artist.delete(db)
