Loading of references in EF7 - asp.net-core-mvc

Question

I'm having two classes - author and blogpost:
public class Author
{
public Author()
{
Blogposts = new HashSet<Blogpost>();
}
public int Id { get; set; }
public string Name { get; set; }
public virtual ICollection<Blogpost> Blogposts { get; set; }
}
and
public class Blogpost
{
public Blogpost()
{
}
// Properties
public int Id { get; set; }
public string Text { get; set; }
public int AuthorId { get; set; }
public Author Author { get; set; }
}
Using EF7 (beta4), I'm connecting them the following way:
public partial class MyDbContext : DbContext
{
public virtual DbSet<Author> Author { get; set; }
public virtual DbSet<Blogpost> Blogpost { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<Author>(entity =>
{
entity.Property(e => e.Id)
.ForSqlServer().UseIdentity();
});
modelBuilder.Entity<Blogpost>(entity =>
{
entity.Property(e => e.Id)
.ForSqlServer().UseIdentity();
});
modelBuilder.Entity<Blogpost>(entity =>
{
entity.Reference<Author>(d => d.Author).InverseCollection(p => p.Blogposts).ForeignKey(d => d.AuthorId);
});
}
}
When I access a blogpost Db.Blogpost.First(x => x.Id == id) I retrieve the Blogpost object - however, the .Author property is null. Also, when retrieving any Author object, it's .Blogposts collection is empty.
I understand the EF7 has neither implemented eager-loading nor lazy-loading yet. But how would I then retrieve/assign any objects referenced via foreign key?

Answer 1

EF 7 has implemented eager loading.
Use .Include
var post = context.Blogpost.First(); // post.Author will be null
var post = context.Blogpost.Include(b => b.Author).First(); // post.Author will be loaded
For more information on working with collections, see the answer to this question: How to work with collections