I keep getting this error when I try to submit to the database:
A dependent property in a ReferentialConstraint is mapped to a store-generated column. Column: 'NPPRProvId'
Here's where it breaks:
public static bool Save(NPPR_Provider provider, State state, string filename, bool validateBeforeSave = true )
{
using (var db = new NPPRContext(state))
{
var prov = new NPPR_Provider()
{
First = provider.First,
Middle = provider.Middle,
Last = provider.Last,
DateOfBirth = provider.DateOfBirth,
DateOfDeath = provider.DateOfDeath,
Gender = provider.Gender,
SSN = provider.SSN,
DegreeCode = provider.DegreeCode,
BusinessName = provider.BusinessName,
DbaName = provider.DbaName,
Action = "A",
EffectiveDate = "20121212",
EndDate = "99991231",
NPPR_ServLocation = new NPPR_ServLocation()
{
EnrollmentType = provider.NPPR_ServLocation.EnrollmentType,
OrganizationType = provider.NPPR_ServLocation.OrganizationType,
ProviderTypeCode = provider.NPPR_ServLocation.ProviderTypeCode,
IRSTaxAssociations = provider.NPPR_ServLocation.IRSTaxAssociations,
NPIAssociations = provider.NPPR_ServLocation.NPIAssociations,
Address = provider.NPPR_ServLocation.Address
},
NPPR_Header = new NPPR_Header()
{
FileName = filename,
TransactionDate = Utilities.DateTimeToPRNDate(DateTime.Now),
FileLoadDate = DateTime.Now,
SubmitterId = "M00000503",
Purpose = "A",
Action = "A"
}
};
foreach(var npi in prov.NPPR_ServLocation.NPIAssociations)
{
npi.NPIType = prov.NPPR_ServLocation.OrganizationType == "I" ? "1" : "2";
}
prov.NPPR_ServLocation.Licenses = SegmentOrNull<NPPR_Licenses>(provider.NPPR_ServLocation, "Licenses", "LicenseNumber");
prov.NPPR_ServLocation.Certifications = SegmentOrNull<NPPR_Certifications>(provider.NPPR_ServLocation, "Certifications", "CertificationNumber");
prov.NPPR_ServLocation.Specialties = SegmentOrNull<NPPR_Specialties>(provider.NPPR_ServLocation, "Specialties", "SpecialtyCode");
prov.NPPR_ServLocation.Taxonomies = SegmentOrNull<NPPR_Taxonomies>(provider.NPPR_ServLocation, "Taxonomies", "TaxonomyCode");
prov.NPPR_ServLocation.OtherIds = SegmentOrNull<NPPR_OtherIds>(provider.NPPR_ServLocation, "OtherIds", "IdentifierTypeId");
prov.NPPR_ServLocation.GroupAssociations = SegmentOrNull<NPPR_GroupAssociations>(provider.NPPR_ServLocation, "GroupAssociations", "ProviderLocationId");
db.NPPR_Provider.Add(prov);
if (validateBeforeSave)
db.SaveChangesWithValidation();
else
db.SaveChanges();
return true;
}
}
db.SaveChanges() is where, according to the stacktrace, the exception is thrown. This function was originally written for EF Core, but due to issues with the server, I was forced to turn everything to EF6.4. Under Core, this method worked fine, but under EF6, it throws an exception. I've tried a few things I've read on other SO questions but so far no luck.
Specifically the exception throws on the NPPR_Provider primary key, NPPRProvId, which at no point in my code is ever read or written, except to be defined in the model.
In SQL, the NPPRProvId is PK, int, not null
The model involved:
public class NPPR_Provider : Provider
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int NPPRProvId { get; set; }
//[ForeignKey("NPPR_Header")]
public int? NPPRFileId { get; set; }
[ForeignKey("NPPRFileId")]
public NPPR_Header NPPR_Header { get; set; }
[ForeignKey("NPPRProvId")]
public NPPR_ServLocation NPPR_ServLocation { get; set; }
}
What am I doing wrong here and how might I fix it? I'm still fairly new to EF and this is my first major project in EF and MVC, and in the .NET framework in general.
In EF Core the NPPR_ServLocation could be an owned object but to my knowledge in EF 6 there are not owned objects; you need to define them explicitly in a separate table and give them keys.
public class NPPR_Provider : Provider
{
public int NPPR_ProviderId { get; set; }
public NPPR_Header NPPR_Header { get; set; }
public NPPR_ServLocation NPPR_ServLocation { get; set; }
… // data properties here
}
public class NPPR_Header {
public int NPPR_HeaderId {get;set;}
public int NPPR_ProviderId {get;set;}
public NPPR_Provider {get;set;}
… // data properties here
}
public class NPPR_ServLocation {
public int NPPR_ServLocationId {get;set;}
public int NPPR_ProviderId {get;set;}
public NPPR_Provider {get;set;}
… // data properties here.
}
I'm building Backend for Mobile Application with ASP.NET MVC Framework.
I have two Objects:
public class CarLogItem : EntityData
{
public CarLogItem(): base()
{
Time = DateTime.Now;
}
public DateTime Time { get; set; }
public int RPM { get; set; }
public int Speed { get; set; }
public int RunTime { get; set; }
public int Distance { get; set; }
public int Throttle { get; set; }
[ForeignKey("Trip")]
public String Trip_id { get; set; }
// Navigation property
public TripItem Trip { get; set; }
}
and
public class TripItem : EntityData
{
public TripItem() : base()
{
UserId = User.GetUserSid();
StartTime = DateTime.Now;
logItems = new List<CarLogItem>();
}
public string UserId { get; set; }
public List<CarLogItem> logItems {get;set;}
public DateTime StartTime { get; set; }
}
and I have controller, which add new CarLogItem to database.
public class CarLogItemController : TableController<CarLogItem>
{
// POST tables/CarLogItem
public async Task<IHttpActionResult> PostCarLogItem(CarLogItem item)
{
var lastItem = db.CarLogItems.OrderByDescending(x => x.Time).FirstOrDefault();
//lastItem = (Query().Where(logitem => true).OrderBy(logitem => logitem.Time)).Last();
//checking if lastItem.Trip isn't null because
// I have entities with Trip field is null, but all of them should have it.
if (lastItem != null && lastItem.Trip != null && item.RunTime > lastItem.RunTime)
{
item.Trip = lastItem.Trip;
}
//In order to test adding of new TripItem entity to database
// I compare item.RunTime with 120, so it always true
else if (lastItem == null || item.RunTime < 120) // < lastItem.RunTime)
{
var newTrip = new TripItem();
item.Trip = newTrip;
}
else
{
throw new ArgumentException();
}
CarLogItem current = await InsertAsync(item);
return CreatedAtRoute("Tables", new { id = current.Id }, current);
}
}
When I'm trying to add new CarLogItem with Trip = null it's ok, but when Trip is particular object it fails with following Exception:
The entity submitted was invalid: Validation error on property 'Id': The Id field is required
How properly to add new CarLogItem with nested TripItem?
I think that you need to populate the Id property on your TripItem, e.g.
var newTrip = new TripItem(){ Id = Guid.NewGuid() }
You need a primary key field in every entity class, like Id or CarLogItemId (ClassName + "Id"). Or just have a property with [Key] attribute:
[Key]
public string/int/Guid/any-db-supported-type MyProp { get; set; }
Entity Framework relies on every entity having a key value that it
uses for tracking entities. One of the conventions that code first
depends on is how it implies which property is the key in each of the
code first classes. That convention is to look for a property named
“Id” or one that combines the class name and “Id”, such as “BlogId”.
The property will map to a primary key column in the database.
Please see this for more details.
I also suspect this to be a problem:
public Lazy<CarLogItem> logItems { get; set; }
You don't have to mark navigation property as Lazy<>. It is already lazy (unless you have configuration that disables lazy loading). Please try to remove Lazy<> and see if it works this way.
public class Person
{
[Required]
public int? KupaId { get; set; }
[ForeignKey("KupaId")]
public Kupa Kupa { get; set; }
public int? newKupaId { get; set; }
[ForeignKey("newKupaId")]
public Kupa NewKupa { get; set; }
}
public class Kupa
{
public int Id { get; set; }
[Index("Ix_uniqueId", IsUnique = true)]
public int ? uniqueId { get; set; }
}
public class MyController:Controller
{
public Json EditKupa(Expression<Func<Person,bool>> criteria )
{
using (IKupotRepository<Person> _IPersonRepository = new SQlRepository<Person>())
{
Person personToEdit=_IPersonRepository.SingleOrDefault(criteria,GetIncludeProperties());
> //Getting the new kupa obj from db
newKupa = GetKupa(UniqueId);
<//changing the unique property to null
personToEdit.Kupa.ToremId = null;
personToEdit.Kupa.State = State.Modified;
personToEdit.NewKupa = newKupa;
>//Assign the unique id property the value that was in the first Kupa
personToEdit.NewKupa.ToremId = 1;
personToEdit.newKupaId = newKupa.Id;
personToEdit.NewKupa.State = State.Modified;
_IPersonRepository.SaveChanges();
}
}
when calling saveChanges() getting an exception :unique key violation , when looking at the sql profiler i can see that EF 6 generates an update query for both the Kupa object but it tries to update the NewKupa.uniqueId before updating the Kupa.uniqueId ?
Assuming you are using SQL Server as a database server this is happening because you allow NULL values in that column and NULL = NULL is NULL so if you have multiple rows with NULL on that column you'll get the error.
To implement this in SQL statements will be like this:
CREATE UNIQUE NONCLUSTERED INDEX Idx_UniqueId_NotNull
ON Kupa(uniqueId)
WHERE uniqueId IS NOT NULL;
However, to do this in EF there is no easy way, but there is a workaround in this SO answer here.
I have two classes:
public partial class TSS_Filter
{
[Key]
public int filter_id { get; set; }
public int? rackId { get; set; }
public virtual TSS_Rack TSS_Rack { get; set; }
}
AND
public partial class TSS_Rack
{
public TSS_Rack()
{
TSS_Filter = new HashSet<TSS_Filter>();
}
[Key]
public int rack_id { get; set; }
public virtual ICollection<TSS_Filter> TSS_Filter { get; set; }
}
When I try to save the filter with a Rack object it takes the copy of the Rack object in the database and re creates it with the next sequential primary key and all of the rest of the data is the same.
Example:
Rack Table:
1 - rack 1 - datais here <- the rack row I want to use for the foreign key
2 - rack 1 - datais here <- the created copy row that actually get assigned
Why is sql server/entity framework behaving this way?
Save code:
using (ScaleManagerEntities SSDb = new ScaleManagerEntities())
{
TSS_Filter filter = new TSS_Filter();
filter.TSS_Rack = SelectedRack;
SSDb.SaveChanges();
}
using (ScaleManagerEntities SSDb = new ScaleManagerEntities())
{
TSS_Rack rack = SSDb.TSS_Rack.Where(r => r.rack_id == SelectedRack.rack_id).FirstOrDefault();
foreach (TSS_Filter filter in Filters)
{
filter.createdAt = DateTime.Now;
filter.isUsed = false;
filter.TSS_Rack = rack;
SSDb.TSS_Filter.Add(filter);
}
SSDb.SaveChanges();
}
If I looked up with rack within the same context as I did save it the Database didn't have any trouble knowing it was the same object. Seems weird it wouldn't just know that they were the same row in the DB based on the RackId.
Would appreciate any that could make the database recognize the Object outside of the same using session. Thanks.
I have the following two models
[DataContract]
public class Event
{
[Key]
public int ID { get; set; }
public string Name { get; set; }
public Place Place { get; set; }
}
[DataContract]
public class Place
{
[Key]
public string ID { get; set; }
public string Name { get; set; }
}
and data context class:
public class myDB: DbContext
{
public DbSet<Event> Events { get; set; }
public DbSet<Place> Places { get; set; }
}
I run the following code for example
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
RegisterGlobalFilters(GlobalFilters.Filters);
RegisterRoutes(RouteTable.Routes);
Foo();
}
private void Foo()
{
var db = new myDB();
var place = new Place
{
ID = "{59E0F90C-03DB-453C-8C9E-4747957ED37E}",
Name = "Home",
};
db.Places.Add(place);
db.SaveChanges();
var #event = new Event
{
Name = "Test",
Place = place,
TimeFrame = new TimeFrame() {StartTime = DateTime.Now, EndTime = DateTime.Now }
};
db.Events.Add(#event);
db.SaveChanges();
var eventIndex = #event.ID;
var ev = db.Events.Find(#eventIndex);
var evPlace = ev.Place;
var pl = db.Places.Find("{59E0F90C-03DB-453C-8C9E-4747957ED37E}");
}
everything works fine and evPlace is the object I just added to db, pl is also not null.
But when I try to run the following code from the controller where 5 is the ID of the new event object
var ev = _db.Events.Find(5);
var evPlace = ev.Place;
var pl = _db.Places.Find("{59E0F90C-03DB-453C-8C9E-4747957ED37E}");
pl and ev are not null but ev.Place is null (evPlace)
Any idea why?
The problem has nothing to do with the primary key being a string or not. Generally Entity Framework doesn't load navigation properties automatically. You need to specify that explicitly:
var ev = db.Events.Include(e => e.Place).SingleOrDefault(e => e.ID == 5);
Or: If you declare the Place property as virtual...
public virtual Place Place { get; set; }
...EF will enable lazy loading for this property and load the Place from the database as soon as you access it in your code. Your code example would work then. Be aware that lazy loading leads to a second query/roundtrip to the database whereas eager loading (Include) loads both the event and the place in a single query.
More about loading related entities is here.