Entity Framework - Fluent APi - Tabelle mit 2 FK erstellen
Ich habe diese Produktklasse, der eine Liste von Produkten zugeordnet ist.
z.B
Product = StarWar
AssociatedProducts = Episode V: Das Imperium schlägt zurück, Episode VI: Rückkehr der Jedi, Episode VII: Das Erwachen der Macht
Aber EF generiert die Datenbank mit einigen zusätzlichen Spalten.
Dies ist meine Produktklasse:
public class Product
{
public int Id { get; set; }
public string Name { get; set; }
public string ShortDescription { get; set; }
public string FullDescription { get; set; }
public decimal UnitPrice { get; set; }
......
public virtual ICollection<AssociatedProducts> AssociatedProducts { get; set; }
......
}
Dies ist meine AssociatedProduct-Klasse:
public class AssociatedProducts
{
public int Id { get; set; }
public int ProductId { get; set; }
public int AssociatedProductId { get; set; }
public int DisplayOrder { get; set; }
public DateTime CreatedOn { get; set; }
public virtual Product Products { get; set; }
public virtual Product AssociatedProductsId { get; set; }
}
Dies ist meine Zuordnung für die AssocietedProduct-Klasse:
public AssociatedProductsMap()
{
// Primary Key
HasKey(a => a.Id);
// Properties
Property(a => a.CreatedOn).IsRequired();
Property(a => a.ProductId).IsRequired();
Property(a => a.AssociatedProductId).IsRequired();
Property(a => a.DisplayOrder).IsRequired();
//Relationship
HasRequired(a => a.Products)
.WithMany(p => p.Products)
.HasForeignKey(a => a.ProductId)
.WillCascadeOnDelete(false);
HasRequired(a => a.AssociatedProductsId)
.WithMany(p => p.AssociatedProducts)
.HasForeignKey(a => a.AssociatedProductId)
.WillCascadeOnDelete(false);
//Table
ToTable("AssociatedProducts");
}
Und so säte ich:
var associetedProducts = new List<AssociatedProducts>
{
new AssociatedProducts {ProductId= 1, AssociatedProductId = 3, DisplayOrder = 1, CreatedOn = DateTime.Now},
new AssociatedProducts {ProductId= 1, AssociatedProductId = 4, DisplayOrder = 2, CreatedOn = DateTime.Now},
new AssociatedProducts {ProductId= 1, AssociatedProductId = 5, DisplayOrder = 3, CreatedOn = DateTime.Now}
}
new List<Product>
{
new Product {Name = "StarWar", ShortDescription = "...", FullDescription = "P.......", UnitPrice = 15m, AssociatedProducts = associetedProducts},
new Product {Name = "StarWar Episode V", ShortDescription = "...", FullDescription = "P.......", UnitPrice = 15m},
new Product {Name = "StarWar Episode VI", ShortDescription = "...", FullDescription = "P.......", UnitPrice = 15m},
new Product {Name = "StarWar Episode VII", ShortDescription = "...", FullDescription = "P.......", UnitPrice = 15m},
}.ForEach(a => context.Products.AddOrUpdate(a));
context.SaveChanges();
Das erwarte ich von der AssociatedProductsId-Tabelle: ID + ProductId (FK) + AssociatedProductsId (FK) + Datum + ......
Aber das bekomme ich:
Was ist mein Fehler? Ist dies eine gute Möglichkeit, ein Produkt zuzuordnen?