//EDMX ファイル http://pastebin.com/btTCRMf7
私は2つのテーブルを持っていCustomers
ますSites
//Site
public int ID { get; set; }
public string Name { get; set; }
public string Address { get; set; }
public int CustomerID { get; set; }
public int CityID { get; set; }
public int CountryID { get; set; }
public int EncodedBy { get; set; }
public System.DateTime DateEncoded { get; set; }
public virtual City City { get; set; }
public virtual Country Country { get; set; }
public virtual ICollection<Invoice> Invoices { get; set; }
public virtual User User { get; set; }
public virtual Customer Customer { get; set; }
//Customer
public int ID { get; set; }
public string Name { get; set; }
public string Address { get; set; }
public int CityID { get; set; }
public int CountryID { get; set; }
public int CreditTermID { get; set; }
public int EncodedBy { get; set; }
public System.DateTime DateEncoded { get; set; }
public virtual City City { get; set; }
public virtual Country Country { get; set; }
public virtual CreditTerm CreditTerm { get; set; }
public virtual User User { get; set; }
public virtual ICollection<Invoice> Invoices { get; set; }
public virtual ICollection<Site> Sites { get; set; }
//Country
public int ID { get; set; }
public string Name { get; set; }
public virtual ICollection<Customer> Customers { get; set; }
public virtual ICollection<Site> Sites { get; set; }
//City
public int ID { get; set; }
public string Name { get; set; }
public virtual ICollection<Customer> Customers { get; set; }
public virtual ICollection<Site> Sites { get; set; }
//SiteModel
private static IQueryable<Site> Build(this DbSet<Site> query)
{
return query.Include("User").Include("City").Include("Country").Include("Customer");
}
public static Site Find(int siteID)
{
using (DragonRentalsEntities context = new DragonRentalsEntities(new ConfigurationManager().ConnectionString))
{
Site result = context.Sites.Build().SingleOrDefault(s => s.ID == siteID);
return result;
}
}
public static Site Update(Site _updatedSite)
{
using (DragonRentalsEntities context = new DragonRentalsEntities(new ConfigurationManager().ConnectionString))
{
context.Sites.Attach(_updatedSite);
context.Entry(_updatedSite).State = EntityState.Modified;
context.SaveChanges();
return Find(_updatedSite.ID);
}
}
Site test = SiteModel.Find(1);
test.City = null;
test.CityID = 1;
test.Country = null;
test.CountryID = 1;
test.Customer = null;
test.CustomerID = 1;
SiteModel.Update(test);
私は得ていますA referential integrity constraint violation occurred: The property values that define the referential constraints are not consistent between principal and dependent objects in the relationship.
test.Customer.City = null;
ただし、オブジェクトを更新する前に追加すると機能します。Customer.City と Site.City が競合しているようです。誰かが理由を説明できますか?または任意の回避策?