> Net 4.0でCode First EF 5.0を使用しており、2つのクラスがあります。
public partial class Kennel
{
public Kennel()
{
this.Brands = new List<Brand>();
this.Dogs = new List<Dog>();
this.Breeds = new List<Breed>();
this.Owners = new List<Person>();
this.Name1 = new KennelName();
this.Name2 = new KennelName();
}
public int ID { get; set; }
public /*DogClub*/int Type { get; set; }
public KennelName Name1 { get; set; }
public KennelName Name2 { get; set; }
public string CertificateNumber { get; set; }
public System.DateTime? AssigmentDate { get; set; }
public string Folder { get; set; }
public string Comment { get; set; }
public int StatusID { get; set; }
public int? FederationID { get; set; }
public int? MainOwnerID { get; set; }
public int? MainBreedID { get; set; }
public virtual ICollection<Brand> Brands { get; set; }
public virtual ICollection<Dog> Dogs { get; set; }
public virtual Breed MainBreed { get; set; }
public virtual Federation Federation { get; set; }
public virtual Status Status { get; set; }
public virtual Person MainOwner { get; set; }
public virtual ICollection<Breed> Breeds { get; set; }
public virtual ICollection<Person> Owners { get; set; }
}
public partial class Breed
{
public Breed()
{
this.Dogs = new List<Dog>();
this.ExpertKerungs = new List<ExpertKerung>();
this.Hallmarks = new List<Hallmark>();
this.Colors = new List<Color>();
this.ExpertBreeds = new List<ExpertBreed>();
this.Kennels = new List<Kennel>();
this.MainKennels = new List<Kennel>();
}
public int ID { get; set; }
public string FciNumber { get; set; }
public string Name { get; set; }
public int BreedGroupID { get; set; }
public bool IsKerung { get; set; }
public string NameLat { get; set; }
public string NativeName { get; set; }
public int CountryID { get; set; }
public System.DateTime? StandardDate { get; set; }
public bool IsCACIB { get; set; }
public bool IsWork { get; set; }
public virtual BreedGroup BreedGroup { get; set; }
public virtual ICollection<Dog> Dogs { get; set; }
public virtual ICollection<ExpertKerung> ExpertKerungs { get; set; }
public virtual ICollection<Hallmark> Hallmarks { get; set; }
public virtual ICollection<Color> Colors { get; set; }
public virtual Country Country { get; set; }
public virtual ICollection<ExpertBreed> ExpertBreeds { get; set; }
public virtual ICollection<Kennel> Kennels { get; set; }
public virtual ICollection<Kennel> MainKennels { get; set; }
}
およびマッピング:
public class KennelMap : EntityTypeConfiguration<Kennel>
{
public KennelMap()
{
// Primary Key
this.HasKey(t => t.ID);
// Properties
//this.Property(t => t.Name1.Name)
// .IsRequired();
//this.Property(t => t.Name1.IntlName)
// .IsRequired();
//this.Property(t => t.Name2.Name)
// .IsRequired();
//this.Property(t => t.Name2.IntlName)
// .IsRequired();
// Table & Column Mappings
this.ToTable("Kennels");
this.Property(t => t.ID).HasColumnName("ID");
this.Property(t => t.Type).HasColumnName("Type");
this.Property(t => t.Name1.Name).HasColumnName("Name1_Name");
this.Property(t => t.Name1.IntlName).HasColumnName("Name1_IntlName");
this.Property(t => t.Name1.Type).HasColumnName("Name1_Type");
this.Property(t => t.Name1.Approved).HasColumnName("Name1_Approved");
this.Property(t => t.Name2.Name).HasColumnName("Name2_Name");
this.Property(t => t.Name2.IntlName).HasColumnName("Name2_IntlName");
this.Property(t => t.Name2.Type).HasColumnName("Name2_Type");
this.Property(t => t.Name2.Approved).HasColumnName("Name2_Approved");
this.Property(t => t.CertificateNumber).HasColumnName("CertificateNumber");
this.Property(t => t.AssigmentDate).HasColumnName("AssigmentDate");
this.Property(t => t.Folder).HasColumnName("Folder");
this.Property(t => t.Comment).HasColumnName("Comment");
this.Property(t => t.StatusID).HasColumnName("StatusID");
this.Property(t => t.FederationID).HasColumnName("FederationID");
this.Property(t => t.MainOwnerID).HasColumnName("MainOwnerID");
// Relationships
this.HasMany(t => t.Owners)
.WithMany(t => t.Kennels)
.Map(m =>
{
m.ToTable("OwnerKennel");
m.MapLeftKey("Kennels_ID");
m.MapRightKey("Owners_ID");
});
this.HasOptional(t => t.MainBreed)
.WithMany(t => t.MainKennels)
.HasForeignKey(d => d.MainBreedID);
this.HasOptional(t => t.Federation)
.WithMany(t => t.Kennels)
.HasForeignKey(d => d.FederationID);
this.HasRequired(t => t.Status)
.WithMany(t => t.Kennels)
.HasForeignKey(d => d.StatusID);
this.HasOptional(t => t.MainOwner)
.WithMany(t => t.MainKennels)
.HasForeignKey(d => d.MainOwnerID)
.WillCascadeOnDelete(false);
}
}
次のコードを書くと:
int breedID = 1; // some value
Breed br = _kennel.Breeds.FirstOrDefault(t => t.ID == breedID);
if (br != null)
{
_kennel.MainBreed = br;
// but: _kennel.MainBreedID != br.ID
}
また:
int breedID = 1; // some value
Breed br = _kennel.Breeds.FirstOrDefault(t => t.ID == breedID);
if (br != null)
{
_kennel.MainBreedID = breedID;
// but: _kennel.MainBreed != br
}
EFがナビゲーションプロパティを更新しないのはなぜですか? ProxyCreationEnabled と AutoDetectChangesEnabled を設定しましたが、うまくいきません。
サンプル コードの別の例を参照してください (実際のアプリケーション コードを正確に反映しています)。
Kennel kennel = ctx.Kennels.Add(ctx.Kennels.Create());
kennel.Name1.Name = "Test Kennel";
List<Breed> breeds = ctx.Breeds.Include(b => b.BreedGroup).OrderBy(t => t.BreedGroupID).Where(t => t.ID == 755 || t.ID == 772).ToList();
foreach (var b in breeds)
kennel.Breeds.Add(b);
if (breeds.Count > 0)
{
kennel.MainBreed = breeds[0];
foreach (var k in kennel.MainBreed.MainKennels)
System.Diagnostics.Debug.WriteLine("MainKennel: " + k.Name1.Name);
ctx.ChangeTracker.DetectChanges();
//System.Diagnostics.Debug.WriteLine("MainBreed: " + kennel.MainBreed);
System.Diagnostics.Debug.WriteLine("MainBreedID: " + kennel.MainBreedID);
}
DetectChanges の呼び出し後、すべてのナビゲーション プロパティとコレクションに変更が反映されます (kennel.MainBreedID != null)。