I try to detach an entity of type group.
Actucally I save it in my cache, and detach it a moment before responding the client.
On the next request I get the group from the cache and re-attch a new objectContext.
However I get An entity object cannot be referenced by multiple instances of IEntityChangeTracker
I know attach includes all related entities but detach doesn't. There I have to detach every related entity.
What am I missing in my detach?
here is my entities hirarchy:
public partial class App
{
public App()
{
this.Pairs = new HashSet<Pair>();
}
public string AppName { get; set; }
public System.Guid AppGuid { get; set; }
public string ClientAppID { get; set; }
public bool IsDeleted { get; set; }
public Nullable<System.DateTime> CreatedDate { get; set; }
public Nullable<System.DateTime> UpdatedDate { get; set; }
public virtual AppsData AppsData { get; set; }
public virtual ICollection<Pair> Pairs { get; set; }
}
public partial class AppsData
{
public System.Guid AppGuid { get; set; }
public string Url { get; set; }
public string DisplayName { get; set; }
public string AppDesc { get; set; }
public string PrivacyPolicyUrl { get; set; }
public string TermsOfUseUrl { get; set; }
public string LocalizationKey { get; set; }
public string Compatibility { get; set; }
public bool HiddenApp { get; set; }
public bool IsExperimental { get; set; }
public virtual App App { get; set; }
}
public partial class Browser
{
public Browser()
{
this.BrowserVersions = new HashSet<BrowserVersion>();
}
public int BrowserID { get; set; }
public string BrowserName { get; set; }
public string BrowserCode { get; set; }
public virtual ICollection<BrowserVersion> BrowserVersions { get; set; }
}
public partial class BrowserVersion
{
public BrowserVersion()
{
this.BrowserVerToCriterias = new HashSet<BrowserVerToCriteria>();
}
public System.Guid BrowserVersionID { get; set; }
public int BrowserID { get; set; }
public string Version { get; set; }
public System.DateTime CreatedDate { get; set; }
public System.DateTime UpdatedDate { get; set; }
public Nullable<int> Group_Id { get; set; }
public virtual Browser Browser { get; set; }
public virtual ICollection<BrowserVerToCriteria> BrowserVerToCriterias { get; set; }
}
public partial class BrowserVerToCriteria
{
public System.Guid CriteriaID { get; set; }
public System.Guid BrowserVersionID { get; set; }
public string ConditionBrowserVersion { get; set; }
public virtual BrowserVersion BrowserVersion { get; set; }
public virtual Criterion Criterion { get; set; }
}
public partial class CommonConfig
{
public int ID { get; set; }
public string NAME { get; set; }
public string VALUE { get; set; }
public System.DateTime CREATED_DATE { get; set; }
public System.DateTime UPDATED_DATE { get; set; }
public byte GROUP_ID { get; set; }
public string DESCRIPTION { get; set; }
}
public partial class Country
{
public Country()
{
this.Criteria = new HashSet<Criterion>();
this.Criteria1 = new HashSet<Criterion>();
}
public int CountryID { get; set; }
public string CountryCode { get; set; }
public string CountryName { get; set; }
public virtual ICollection<Criterion> Criteria { get; set; }
public virtual ICollection<Criterion> Criteria1 { get; set; }
}
public Criterion()
{
this.BrowserVerToCriterias = new HashSet<BrowserVerToCriteria>();
this.Countries = new HashSet<Country>();
this.CountriesExceptions = new HashSet<Country>();
this.Pairs = new HashSet<Pair>();
}
public System.Guid CriteriaID { get; set; }
public string Domains { get; set; }
public System.DateTime CreatedDate { get; set; }
public System.DateTime UpdatedDate { get; set; }
public string DomainsExclude { get; set; }
public virtual ICollection<BrowserVerToCriteria> BrowserVerToCriterias { get; set; }
public virtual ICollection<Country> Countries { get; set; }
public virtual ICollection<Country> CountriesExceptions { get; set; }
public virtual ICollection<Pair> Pairs { get; set; }
}
public partial class CTID
{
public string CTID1 { get; set; }
public string AppVersion { get; set; }
}
public partial class CtidPgPastExistence
{
public string Ctid { get; set; }
}
public partial class Group
{
public Group()
{
this.Pairs = new HashSet<Pair>();
}
public System.Guid GroupId { get; set; }
public int TestId { get; set; }
public int IdInTest { get; set; }
public bool WelcomeExperienceEnabledByDefault { get; set; }
public virtual MamConfiguration MamConfiguration { get; set; }
public virtual ICollection<Pair> Pairs { get; set; }
}
public partial class MamConfiguration
{
public MamConfiguration()
{
this.Groups = new HashSet<Group>();
this.MamConfigurationCTIDs = new HashSet<MamConfigurationCTID>();
}
public int TestID { get; set; }
public string TestName { get; set; }
public string Description { get; set; }
public int StatusId { get; set; }
public System.DateTime CreatedDate { get; set; }
public System.DateTime UpdatedDate { get; set; }
public bool IsProd { get; set; }
public int TestTraffic { get; set; }
public virtual ICollection<Group> Groups { get; set; }
public virtual MamConfigurationStatus MamConfigurationStatus { get; set; }
public virtual ICollection<MamConfigurationCTID> MamConfigurationCTIDs { get; set; }
}
public partial class MamConfigurationCTID
{
public int TestID { get; set; }
public string CTID { get; set; }
public virtual MamConfiguration MamConfiguration { get; set; }
}
public partial class MamConfigurationStatus
{
public MamConfigurationStatus()
{
this.MamConfigurations = new HashSet<MamConfiguration>();
}
public int StatusId { get; set; }
public string Status { get; set; }
public virtual ICollection<MamConfiguration> MamConfigurations { get; set; }
}
public partial class Pair
{
public Pair()
{
this.Groups = new HashSet<Group>();
}
public System.Guid PairID { get; set; }
public System.Guid CriteriaID { get; set; }
public System.Guid AppGuid { get; set; }
public virtual App App { get; set; }
public virtual Criterion Criterion { get; set; }
public virtual ICollection<Group> Groups { get; set; }
}
public partial class SettingsServicesConfig
{
public int ID { get; set; }
public string Name { get; set; }
public string URL { get; set; }
public int Interval { get; set; }
public System.DateTime UPDATED_DATE { get; set; }
public System.DateTime CREATED_DATE { get; set; }
public int GROUP_ID { get; set; }
}
here is my detach function:
public void Detach<T>(MaMDBEntities maMdbEntities, T item) where T : class, new()
{
switch (typeof (T).Name.ToLower())
{
case "group":
{
var group = item as Group;
if (group == null)
{
mApplicationLogger.Error(string.Format("Couldn't cast item to type 'Group'"));
throw new InvalidCastException(string.Format("Couldn't cast item to type 'Group'"));
}
DetachState(maMdbEntities, group.MamConfiguration);
foreach (var pair in group.Pairs.ToList())
{
DetachState(maMdbEntities, pair.App);
DetachState(maMdbEntities, pair.App.AppsData);
foreach (var country in pair.Criterion.Countries.ToList())
{
DetachState(maMdbEntities, country);
}
foreach (var country in pair.Criterion.CountriesExceptions.ToList())
{
DetachState(maMdbEntities, country);
}
foreach (var browserVerToCriterias in pair.Criterion.BrowserVerToCriterias.ToList())
{
DetachState(maMdbEntities, browserVerToCriterias.BrowserVersion.Browser);
DetachState(maMdbEntities, browserVerToCriterias.BrowserVersion);
DetachState(maMdbEntities, browserVerToCriterias);
}
DetachState(maMdbEntities, pair.Criterion);
DetachState(maMdbEntities, pair);
}
break;
}
}
maMdbEntities.Entry(item).State = EntityState.Detached;
}
private static void DetachState(MaMDBEntities maMdbEntities, object item)
{
maMdbEntities.Entry(item).State = EntityState.Detached;
}
I believe that you need to make sure that none of the entities which remain in your context, reference any of those which have been detached. So if say, something else references a detached instance of Pair, the context will quite happily find it, traverse its navigation properties and add the whole lot back in.
Rather than setting the State property have you tried:
((IObjectContextAdapter)maMdbEntities).ObjectContext.Detach(item);
This is supposed to detach any links to the item being detached in addition to the item itself.
EDIT
Ok, lets look at the "detach any links to the item being detached ...", ObjectContext.Detach ultimately calls this method:
// System.Data.Objects.EntityEntry
internal void Detach()
{
base.ValidateState();
bool flag = false;
RelationshipManager relationshipManager = this._wrappedEntity.RelationshipManager;
flag = (base.State != EntityState.Added && this.IsOneEndOfSomeRelationship());
this._cache.TransactionManager.BeginDetaching();
try
{
relationshipManager.DetachEntityFromRelationships(base.State);
}
finally
{
this._cache.TransactionManager.EndDetaching();
}
this.DetachRelationshipsEntries(relationshipManager);
IEntityWrapper wrappedEntity = this._wrappedEntity;
EntityKey entityKey = this._entityKey;
EntityState state = base.State;
if (flag)
{
this.DegradeEntry();
}
else
{
this._wrappedEntity.ObjectStateEntry = null;
this._cache.ChangeState(this, base.State, EntityState.Detached);
}
if (state != EntityState.Added)
{
wrappedEntity.EntityKey = entityKey;
}
}
DetachEntityFromRelationships breaking down all the links.
The documentation on ObjectContext.Detach is not specific about the tearing down of links http://msdn.microsoft.com/en-us/library/system.data.objects.objectcontext.detach.aspx it does say "After the Detach method is called, the system will no longer keep references that point to this object and it can be collected by the garbage collector", which implies all LinkDescriptors will also have been removed.
With regards your 3rd comment "Do you think IObjectContextAdapter will enable full detachment. Or there will always be other object in context that I will misss and not detach?" there are two things here; there is the property of the object and the LinkDescriptor which the context uses to track to the relationship. Detach merely stops tracking an object's relationships by detaching the LinkDescriptors, it doesn't detach the object at the other end of the relationship. Neither does it set such properties to null, if you inspect the object after detaching it will still have those properties set.
Is this the best approach? Detaching and reattaching is difficult to get right. If you need to detach and reattach I would suggest you move your deep detach rountines into the classes themselves rather than in a generic method.
That said, you wrote "On the next request I get the group from the cache..." which leads to me wonder what would be the longest period of time between two requests? Could you be introducing concurrency issues by caching? Are you hosting your WCF service in IIS? Could you use IIS's caching if concurrency will not be a problem? Are you handling all requests on the same thread? You might not be aware that ObjectContext instance methods are not thread safe.
Related
I have a parent object(brand) with list of 5 child object(campaign):
Brand response = await _brandRepository.GetAsync(request.Id);
//other properties mapped fine, but Campaing is null..
var result = _mapper.Map<BrandDto>(response);
return result;
I have these definations for mapping:
CreateMap<Domain.Entity.Campaign, CampaignDto>();
CreateMap<Domain.Entity.Brand, BrandDto>();
objects:
public class BrandDto
{
public int Id { get; set; }
public string Name { get; set; }
public List<CampaignDto> Campaing { get; set; }
}
public class CampaignDto
{
public int Id { get; set; }
public int? ParentCampaignId { get; set; }
public int BrandId { get; set; }
public CampaignDto ParentCampaign { get; set; }
public BrandDto Brand { get; set; }
}
entities:
public class Brand : SqlEntityBase
{
public string Name { get; set; }
public List<Campaign> Campaign { get; set; } = new List<Campaign>();
}
public class Campaign : SqlEntityBase
{
public int? ParentCampaignId { get; set; }
public int BrandId { get; set; }
public Guid ImpressionId { get; set; }
public string Name { get; set; }
public EntryStatus Status { get; set; }
public DateTime? StartDate { get; set; }
public DateTime? EndDate { get; set; }
public DateTime CreatedOn { get; set; }
public Brand Brand { get; set; }
public Campaign ParentCampaign { get; set; }
}
If I map child object manually it works fine, but its not cool
how can I make this proper way?
I can't seem to figure out what is going wrong here, I have configured AutoMapper as follows
services.AddAutoMapper(typeof(MetingenView), typeof(Meting));
And in the controller like this:
public MetingenController(IMapper mapper)
{
this._mapper = mapper;
}
After, I use it like this:
var entity = await this.Context.MetingenView.AsNoTracking().FirstOrDefaultAsync(g =>g.IdMeting == key);
if (entity == null)
{
return NotFound();
}
data.Patch(entity);
var meting = await this.Context.Meting.FirstOrDefaultAsync(m => m.IdMeting == key);
this._mapper.Map(entity, meting);
Then the error rolls out:
AutoMapper.AutoMapperMappingException: Missing type map configuration
or unsupported mapping.
EDIT:
Here are the Meting, and MetingenView classes:
public partial class Meting
{
public int IdMeting { get; set; }
public int IdKoeling { get; set; }
public int IdWerknemer { get; set; }
public int IdGebouw { get; set; }
public int Temperatuur { get; set; }
public DateTime AfgenomenTijd { get; set; }
public string ProductNaam { get; set; }
public string Actie { get; set; }
public DateTime? DatumOntstaan { get; set; }
public DateTime? DatumMutatie { get; set; }
public int IndVerwijderd { get; set; }
public DateTime? DatumVerwijderd { get; set; }
public virtual Gebouw IdGebouwNavigation { get; set; }
public virtual Koeling IdKoelingNavigation { get; set; }
public virtual Werknemer IdWerknemerNavigation { get; set; }
}
public partial class MetingenView
{
[Key]
public int IdKlant { get; set; }
public string Locatie { get; set; }
public string SoortKoeling { get; set; }
public int IdMeting { get; set; }
public int IdKoeling { get; set; }
public int IdWerknemer { get; set; }
public int IdGebouw { get; set; }
public int Temperatuur { get; set; }
public string Actie { get; set; }
public string ProductNaam { get; set; }
public DateTime AfgenomenTijd { get; set; }
}
I think the mapping between Meting and MetingenView is not configured in AutoMapper. If you use Asp.Net Core, you could create a profile.
public class MetingProfile : Profile
{
public MetingProfile()
{
CreateMap<MetingenView, Meting>();
}
}
This would create a default mapping that two types have the same property. If you want to config property mapping manually, Function ForMember() would be used.
For example, if you wish that the property MetingenView.IdGebouw maps Meting.IndVerwijderd, you can code this:
CreateMap<MetingenView, Meting>()
.ForMember(dest=>dest.IdGebouw, opt=>opt.MapFrom(src=>src.IndVerwijderd));
I am getting an a Circular Reference Serialization Error and failed to load result...status of 500.
I'm trying to create a dynamic dropdown list with the options from the database, appending options with js.
those are my class:
public class IdentificacionViewModel
{ public virtual Causas Causas { get; set; }
public virtual Identificacion Idententificacion { get; set; }
}
public partial class Causas
{
public int Id { get; set; }
public string Causa { get; set; }
public string Agente { get; set; }
public Nullable<int> Id_Subproceso { get; set; }
public Nullable<int> Id_identificacion { get; set; }
public virtual Identificacion Identificacion { get; set; }
public virtual Subprocesos Subprocesos { get; set; }
}
public Identificacion()
{
this.Causas = new HashSet<Causas>();
}
public int Id { get; set; }
public string Nombre { get; set; }
public Nullable<int> Id_Servicio { get; set; }
public string Etapa { get; set; }
public string Riesgo { get; set; }
public string EfectoProb { get; set; }
public virtual ICollection<Causas> Causas { get; set; }
public virtual Servicios Servicios { get; set; }
public virtual Impacto Impacto { get; set; }
}
my controller is:
public ActionResult GetA()
{
var category = db.Causas.ToList();
return Json(category, JsonRequestBehavior.AllowGet);
}
i don't know what could be the problem and thanks for the help.
Lazy Loading of the Causas collection can be turned off by making the Causas property non-virtual
public ICollection<Causas> Causas { get; set; }
Loading of the Causas collection can still be achieved using eager loading
var Identification = context.Identificacion
.Include(b => b.Causas)
.ToList();
I'm trying to serialize a whole bunch of information with a lot of linked tables so I can pass it through a web service and call it with ajax. The problem I'm having is that there are some one to many relationships, and some many to many relationships and as I'm new to this I'm not sure how to stop the json following infinite loops through my database.
Is there something I am missing a script ignore on something or should I be trying to find a completely different solution?
I need all the data in PageData
public class SiteData
{
public SiteData()
{
this.UrlResponse = new List<Response>();
}
public SiteData(string url, string robots, string siteMap, bool googleVerification, bool bingVerification, List<Response> urlResponse)
{
this.DomainUrl = url;
this.Robots = robots;
this.Sitemap = siteMap;
this.GoogleVerification = googleVerification;
this.BingVerification = bingVerification;
this.UrlResponse = urlResponse;
}
public SiteData(string url)
{
// TODO: Complete member initialization
this.DomainUrl = url;
}
[Key]
public int Id { get; set; }
[Required]
public string DomainUrl { get; set; }
public string Robots { get; set; }
public string Sitemap { get; set; }
public bool GoogleVerification { get; set; }
public bool BingVerification { get; set; }
public List<Response> UrlResponse { get; set; }
[ScriptIgnore]
public virtual ICollection<PageData> PageDatas { get; set; }
}
public class PageData
{
[Key]
[Required]
public int Id { get; set; }
[Required]
public string PageUrl { get; set; }
public string Analytics { get; set; }
public bool Paginated { get; set; }
public bool Flash { get; set; }
public bool Iframe { get; set; }
public bool NoIndexFollow { get; set; }
public bool SchemaTag { get; set; }
public virtual ICollection<Platform> Platforms { get; set; }
public virtual ICollection<AltTag> AltTags { get; set; }
public virtual ICollection<Canonical> Canonicals { get; set; }
public virtual ICollection<MetaTitle> MetaTitles { get; set; }
public virtual ICollection<MetaDesc> MetaDescs { get; set; }
public virtual ICollection<BlogLocation> BlogLocations { get; set; }
public virtual ICollection<H1> H1s { get; set; }
public virtual ICollection<H2> H2s { get; set; }
public virtual ICollection<H3> H3s { get; set; }
public virtual ICollection<ViewState> ViewStates { get; set; }
//[ForeignKey("DomainUrl")]
public SiteData DomainUrl { get; set; }
//public virtual ICollection<SiteData> SiteData { get; set; }
}
public class Platform
{
public Platform() { }
[Key]
public int KeyId { get; set; }
public string PlatformExtension { get; set; }
public int ResponseCode { get; set; }
[ForeignKey("PageData")]
public int Id { get; set; }
[ScriptIgnore]
public virtual PageData PageData { get; set; }
}
public class AltTag
{
public AltTag() { }
public AltTag(int id, string altTag)
{
this.Id = id;
this.AltTagString = altTag;
}
[Key]
public int KeyId { get; set; }
public string AltTagString { get; set; }
[ForeignKey("PageData")]
public int Id { get; set; }
[ScriptIgnore]
public virtual PageData PageData { get; set; }
}
public class Canonical
{
public Canonical() { }
public Canonical(int id, string altTag)
{
this.Id = id;
this.CanonicalString = altTag;
}
[Key]
public int KeyId { get; set; }
public string CanonicalString { get; set; }
[ForeignKey("PageData")]
public int Id { get; set; }
[ScriptIgnore]
public virtual PageData PageData { get; set; }
}
public class MetaTitle
{
public MetaTitle() { }
public MetaTitle(int id, string metaTitle)
{
this.Id = id;
this.MetaTitleString = metaTitle;
}
[Key]
public int KeyId { get; set; }
public string MetaTitleString { get; set; }
[ForeignKey("PageData")]
public int Id { get; set; }
[ScriptIgnore]
public virtual PageData PageData { get; set; }
}
public class MetaDesc
{
public MetaDesc() { }
public MetaDesc(int id, string metaDesc)
{
this.Id = id;
this.MetaDescString = metaDesc;
}
[Key]
public int KeyId { get; set; }
public string MetaDescString { get; set; }
[ForeignKey("PageData")]
public int Id { get; set; }
[ScriptIgnore]
public virtual PageData PageData { get; set; }
}
public class BlogLocation
{
public BlogLocation() { }
public BlogLocation(int id, string blog)
{
this.Id = id;
this.BlogLoc = blog;
}
[Key]
public int KeyId { get; set; }
public string BlogLoc { get; set; }
[ForeignKey("PageData")]
public int Id { get; set; }
[ScriptIgnore]
public virtual PageData PageData { get; set; }
}
public class H1
{
public H1() { }
public H1(int id, string h1)
{
this.Id = id;
this.H1String = h1;
}
[Key]
public int KeyId { get; set; }
public string H1String { get; set; }
[ForeignKey("PageData")]
public int Id { get; set; }
[ScriptIgnore]
public virtual PageData PageData { get; set; }
}
public class H2
{
public H2() { }
public H2(int id, string h2)
{
this.Id = id;
this.H2String = h2;
}
[Key]
public int KeyId { get; set; }
public string H2String { get; set; }
[ForeignKey("PageData")]
public int Id { get; set; }
[ScriptIgnore]
public virtual PageData PageData { get; set; }
}
public class H3
{
public H3() { }
public H3(int id, string h3)
{
this.Id = id;
this.H3String = h3;
}
[Key]
public int KeyId { get; set; }
public string H3String { get; set; }
[ForeignKey("PageData")]
public int Id { get; set; }
[ScriptIgnore]
public virtual PageData PageData { get; set; }
}
public class ViewState
{
public ViewState()
{
this.Existance = new bool();
}
[Key]
public int KeyId { get; set; }
public bool Existance { get; set; }
public int Size { get; set; }
[ForeignKey("PageData")]
public int Id { get; set; }
[ScriptIgnore]
public virtual PageData PageData { get; set; }
}
The actual call:
[WebMethod]
public string GetPage(string pageId)
{
using (var db = new DataContext())
{
PageData page = db.PageDatas.Find(Int32.Parse(pageId));
string json = null;
JavaScriptSerializer jss = new JavaScriptSerializer();
json = jss.Serialize(page);
return json;
}
}
A database is just how you store your information. It has not much to do with how you present that information to the user.
There's no need to make things any more complex than they have to be. What do you show the user? Probably just grids and detail pages, maybe input forms, right?
So provide ways to read only the data you need to show, and to only update the data you need to update.
Here's an example: say you have a grid that you must fill up with data. Rather than fetch data with relationships etc., just fetch a list of rows and bind that list to the grid. One easy way to do this with Entity Framework is to create a VIEW in the database containing only those fields you want to show, then map that VIEW to an Entity in Entity Framework, and then querying that Entity. Grids are read-only anyway (editable grids are completely unnecessary and often very confusing for end users) and you simplify data retrieval this way.
Similarly, for detail pages and even input forms you can provide VIEWs that only contain the data you need to show. For filling up drop-down lists in input forms you can simply read the required entity's values with a simple query.
See also the following links:
Entity Framework and SQL Server View
http://social.msdn.microsoft.com/Forums/en-US/5d834520-8643-4ada-955a-8173178880f4/generate-views-in-entity-framework-50-code-first
http://blogs.u2u.be/diederik/post/2011/01/31/Building-an-Entity-Framework-40-model-on-views-practical-tips.aspx
Good luck!
This question already has answers here:
Why doesn't Include have any effect?
(2 answers)
Closed 1 year ago.
I'm trying to to do include and group in in one sentence
var instanceIdList = context.
Tracks.
Include("Services").
GroupBy(x => x.ServiceId).
Take(top);
but when I check the result at debug I cant see any of the include values
I tried to do in another way
var objectContext = ((IObjectContextAdapter)context).ObjectContext;
var set = objectContext.CreateObjectSet<Track>();
var instanceIdList = set.Include("Services").GroupBy(x => x.ServiceId);
this is the classes :
Track
public partial class Track
{
public long Id { get; set; }
public System.Guid ServiceId { get; set; }
public Nullable<System.Guid> ServiceInterfaceId { get; set; }
public Nullable<System.Guid> ProviderId { get; set; }
public System.Guid ServiceInstanceId { get; set; }
public System.Guid ActivityParentId { get; set; }
public System.Guid ActivityInstanceId { get; set; }
public int ActivityType { get; set; }
public int ServiceRole { get; set; }
public int TrackOrder { get; set; }
public System.DateTime Datetime { get; set; }
public Nullable<System.Guid> MessageId { get; set; }
public int Status { get; set; }
public Nullable<int> ESBErrorCode { get; set; }
public Nullable<int> ESBTecnicalErrorCode { get; set; }
public string ErrorDescription { get; set; }
public string PortName { get; set; }
public string MachineName { get; set; }
public string ConsumerId { get; set; }
public string ExternalId { get; set; }
public string ConsumerMachineName { get; set; }
public int ServiceBehavior { get; set; }
public virtual Message Message { get; set; }
}
Service
public partial class Service
{
public Service()
{
this.Providers = new HashSet<Provider>();
this.ServiceInterfaces = new HashSet<ServiceInterface>();
}
public System.Guid ServiceId { get; set; }
public string ServiceName { get; set; }
public string ServiceNumber { get; set; }
public Nullable<System.Guid> ModelSchemaId { get; set; }
public virtual ICollection<Provider> Providers { get; set; }
public virtual ICollection<ServiceInterface> ServiceInterfaces { get; set; }
}
but the result is the same
thanks
miki
You also need to put include in the end.
Like this...
var instanceIdList = context.Tracks
.GroupBy(x => x.ServiceId)
.Take(top)
.Include("Services");
You have not defined any navigation property for Services in your Track class, you need to add the following property.
public virtual ICollection<Service> Services { get; set; }
Your Track class has no member accessor called service, so
Include("Services")
won't work.
You need to link to Service from Track, e.g.
public Service Services {get;set;}