Does EF upsert have to be done manually?

Question

I want to upsert reference members of an existing entity.

Do I have to write specific code for the upsert?

meaning: I have to check if I\'m handling an existing

Answer 1

See 'AddOrUpdate' method of System.Data.Entity.Migrations.
http://msdn.microsoft.com/en-us/library/system.data.entity.migrations.idbsetextensions.addorupdate%28v=vs.103%29.aspx

using System.Data.Entity.Migrations;

public void Save(Person person) {
    var db = new MyDbContext();
    db.People.AddOrUpdate(person);
    db.SaveChanges();
}