ASP.Net MVC EF-在父创建上添加子

Question

I have an MVC project with a Person class. The Model, Controller, and basic CRUD Views are established and working.

The project contains a Notes class that allows a one-to-many Person/Notes relationship. The Notes table stores all of the notes for a variety of entities in the system, so it is related via an EntityGuid.

The Note model is very basic:

public class Note {

        public int ID { get; set; }
        public Guid EntityGuid { get; set; }
        public string NoteBody { get; set; }

}

As is the Person Controller's Create method for the POST:

    if (ModelState.IsValid) {
        db.Persons.Add(person);
        db.SaveChanges();
        return RedirectToAction("Index");
    }

When creating a person, the Create View has a TinyMCE editor attached to a textarea to record the note. I need the ability to save an initial note (optional) at the time the Person record is saved. This would be a child record to the Person, linked via EntityGuid to parent.

What is the cleanest/correct way to handle this under code-first ASP.Net MVC EF?

Answer 1

If you have the collection of notes defined in your Person class this should do the trick:

var note = new Note{NoteBody=noteFromModel};
        if(person.Notes==null)
          person.Notes=new List<Note>();
        person.Notes.Add(note);
    db.Persons.Add(person);
    db.SaveChanges();