Entity Data Modeling Fundamentals - Entity Framework 6 Recipes - page 36

Listing 2-12. Creating the Photograph POCO Entity

public class Photograph
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int PhotoId { get; set; }
public string Title { get; set; }
public byte[] ThumbnailBits { get; set; }

[ForeignKey("PhotoId")]
public virtual PhotographFullImage PhotographFullImage { get; set; }
}

Create a PhotographFullImage POCO entity class using the code in Listing 2-13.

3.

Listing 2-13. Creating the PhotographFullImage POCO Entity
public class PhotographFullImage
{
[Key]
public int PhotoId { get; set; }
public byte[] HighResolutionBits { get; set; }

[ForeignKey("PhotoId")]
public virtual Photograph Photograph { get; set; }
}

Add an auto-property of type DbSet<Photograph> to your DbContext subclass.

4.

Add another auto-property type of DbSet<PhotographFullImage> to your DbContext
subclass.

5.

Override the OnModelCreating() method of the DbContext class, as shown in Listing 2-14.

6.

Listing 2-14. Overriding the OnModelCreating Method of DbContext

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);

modelBuilder.Entity<Photograph>()
.HasRequired(p => p.PhotographFullImage)
.WithRequiredPrincipal(p => p.Photograph);

modelBuilder.Entity<Photograph>().ToTable("Photograph", "Chapter2");
modelBuilder.Entity<PhotographFullImage>().ToTable("Photograph", "Chapter2");
}