How can I use EF to add multiple child entities to an object when the child has an identity key?

Question

We are using EF5 and SQL Server 2012 the following two classes:

public class Question
{
    public Question()
    {
        this.Answers = new List

        

Answer 1

Try these things:

• use the Create() method of DbSet
• add the new instances to the Answers collection of your Context

You have set the QuestionId appropriately for EF to realise the relationship. Also, do not explicitly set AnswerId to zero.

var a = new _uow.Answers.Create();
a.Text = "AAA";
a.QuestionId = 14;
_uow.Answers.Add(a);

var b = new _uow.Answers.Create();
b.Text = "BBB";
b.QuestionId = 14;
_uow.Answers.Add(a);

You may need to make a call to _uow.ChangeTracker.DetectChanges() if you plan on querying the Answers collection of Question 14