Hibernate merge

Question

I am testing hibernate and giving this query to

transaction = session.beginTransaction();
city = new City(\"A\");
city  = (City)session.merge(city);
city.setNam         


        

Answer 1

It's a sequencing issue. Actually not an issue. Hibernate is doing exactly what you told it to do. As @TejasArjun says, merge is about merging in deteched data. here's what is going on:

...
city  = (City)session.merge(city); 
// No different to save(). Hibernate schedules an insert to the
// database to store the current record.

city.setName("B"); 
// The object is now flagged as dirty and needing to be saved. 
// Hiberate automatically tracks properties on objects and knows when they change.

transaction.commit(); 
// Hibernate sees that 'city' has been changed since it was saved, 
// so it schedules an update to store the new data.