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Saving a list with a reference in nHibernate

I need to save a list of DataNode objects that have a property refering a NodeType objects, but I've tried all kinds of mapping settings, but keep getting errors.
The classes look as followed:
public class DataNode
{
public virtual int Id { get; set; }
public virtual string Value { get; set; }
public virtual NodeType NodeType { get; set; }
}
public class NodeType
{
public virtual int Id { get; set; }
public virtual string Name { get; set; }
}
This is the mapping for the DataNode
public class DataNodeMapping : ClassMap<DataNode>
{
protected readonly string _tableName;
public DataNodeMapping()
: this("ClientDataNode")
{
}
protected DataNodeMapping(string table)
{
_tableName = (table.StartsWith("[") ? table : ($"[{table}]"));
Table(_tableName);
Id(x => x.Id).GeneratedBy.Assigned();
Map(x => x.Value);
HasOne(x => x.NodeType)
.ForeignKey("ClientNodeTypeId")
.PropertyRef(p => p.Id)
.Cascade.AllDeleteOrphan()
.LazyLoad();
OptimisticLock.Version();
}
}
The actual save function looks as follows:
public async Task Execute()
{
var apiDataNodes = await _apiService.GetDataNodes();
var dbDataNodes = await _session.Query<DataNode>().ToListAsync();
using (var transaction = _session.BeginTransaction())
{
foreach (var dto in apiDataNodes.Where(api => !dbDataNodes.Any(db => db.Id == api.Id)))
{
var datanode = _mapper.Map<DataNode>(dto);
await _session.SaveAsync(datanode);
}
transaction.Commit();
}
}
And this results in the following exception:
a different object with the same identifier value was already associated with the session: 203, of entity: ....NodeType
Removing the LazyLoad attribite didn't help either
The nodetype table is already seeded and every DataNode object has a valid value for DataNode.NodeType.Id
There's a one-to-many relationship between DataNode and NodeType.
I've been struggling for hours to get the correct mapping settings, tried several other options like:
References(x => x.NodeType)
.Column("ClientNodeTypeId")
.PropertyRef(p => p.Id);
Resulting in:
Error dehydrating property value for ......NodeType
=> Unable to resolve property: Id
Adding .ReadOnly() to that line ends up in storing the reccords, but with a NULL for every ClientNodeTypeId
Also tried:
Map(x => x.NodeType.Id, "ClientNodeTypeId");
But that resulted in a foreign key constraint error:
The INSERT statement conflicted with the FOREIGN KEY constraint "ClientDataNode_ClientNodeTypeId_ClientNodeType_Id".
Please help, I have no ideas left and spend way too much time already on what shouldn't be a big problem.

Code First With Existing Database, Entity Framework: Cannot insert explicit value for identity column in table when IDENTITY_INSERT is set to OFF

First off, please do not mark this as duplicate. I know it has been touched several times, but I believe my situation is different. I'm doing a code first approach where the database essentially already existed in some for or another as well.
When I call DbContext.SaveChanges() I receive the following error: "Cannot insert explicit value for identity column in table 'CustomerShippingConfiguration' when IDENTITY_INSERT is set to OFF". As you can see in the generated SQL below, Entity Framework is trying to insert 0 into the Id column for a new record.
INSERT [dbo].[CustomerShippingConfiguration]([Id], [CustomerId], [AverageCartonWeight], [AverageCartonsPerPallet], [CreatedBy], [Created], [UpdatedBy], [Updated])
VALUES (#0, #1, #2, #3, #4, #5, #6, #7)
-- #0: '0' (Type = Int32)
-- #1: '119' (Type = Int32)
-- #2: '11' (Type = Decimal, Precision = 18, Scale = 2)
-- #3: '11' (Type = Int32)
-- #4: '616' (Type = Int32)
-- #5: '8/9/2016 10:09:08 AM' (Type = DateTime)
-- #6: '616' (Type = Int32)
-- #7: '8/9/2016 10:09:08 AM' (Type = DateTime)
This Id column is of type INT and setup as the identity column, primary key, and auto increments.
The entity model looks like this:
public class ShippingConfigurationEntity : EntityBase<ShippingConfigurationEntity>, IEntity
{
public int CustomerId { get; set; }
public virtual CustomerEntity Customer { get; set; }
public decimal? AverageCartonWeight { get; set; }
public int? AverageCartonsPerPallet { get; set; }
public virtual ICollection<ShippingAddressEntity> Addresses { get; set; }
public ShippingConfigurationEntity()
{
Addresses = new List<ShippingAddressEntity>();
}
}
public abstract class EntityBase<T>
{
public virtual int Id { get; set; }
public virtual int CreatedBy { get; set; }
public virtual DateTime Created { get; set; }
public virtual int UpdatedBy { get; set; }
public virtual DateTime Updated { get; set; }
}
And the configuration for the entity looks like this:
public class ShippingConfigurationConfiguration : EntityTypeConfiguration<ShippingConfigurationEntity>
{
public ShippingConfigurationConfiguration()
{
HasKey(t => t.Id);
Property(t => t.CustomerId).IsRequired();
Property(t => t.AverageCartonsPerPallet).IsOptional();
Property(t => t.AverageCartonWeight).IsOptional();
Property(t => t.CreatedBy).IsRequired();
Property(t => t.Created).IsRequired();
Property(t => t.UpdatedBy).IsRequired();
Property(t => t.Updated).IsRequired();
ToTable("CustomerShippingConfiguration");
HasMany(x => x.Addresses).WithRequired(x => x.ShippingConfiguration).HasForeignKey(x => x.ShippingConfigurationId).WillCascadeOnDelete();
}
}
There is a parent entity called Customer that looks similar to this:
public class CustomerEntity : EntityBase<CustomerEntity>, IEntity
{
public int LocationID { get; set; }
public virtual ShippingConfigurationEntity ShippingConfiguration { get; set; }
}
Where the configuration looks like this:
class CustomerConfiguration : EntityTypeConfiguration<CustomerEntity>
{
public CustomerConfiguration()
{
HasKey(t => t.Id);
Property(t => t.LocationID).IsRequired();
Ignore(t => t.Created);
Ignore(t => t.CreatedBy);
Ignore(t => t.Updated);
Ignore(t => t.UpdatedBy);
ToTable("Customer");
Property(t => t.Id).HasColumnName("ID");
Property(t => t.LocationID).HasColumnName("LOCATION_ID");
HasOptional(x => x.ShippingConfiguration).WithRequired(x => x.Customer).WillCascadeOnDelete();
}
}
If I remove the relationship between CustomerEntity and ShippingConfiguration Entity, everythings if I use the following for the Id property on ShippingConfiguration:
Property(t => t.Id).IsRequired().HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
I have another entity which is setup in a very similar pattern that works just fine. I'm really at a loss here. Thank you in advance for any advice.

You need to tell your configuration that the database will handle key generation.
using System.ComponentModel.DataAnnotations.Schema;
public class ShippingConfigurationConfiguration : EntityTypeConfiguration<ShippingConfigurationEntity>
{
public ShippingConfigurationConfiguration()
{
HasKey(t => t.Id);
Property(a => a.Id)
.IsRequired()
.HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
}
}

EntiyFramework-Update composite key value in join table with TryGetObjectByKey

I‘m using Entity framework code first ,the following model is a join table with composite key
Model code
public class Schedule
{
public int BabyId { get; set; }
public int VaccineId { get; set; }
public Baby Baby { get; set; }
public Vaccine Vaccine { get; set; }
public DateTime Time { get; set; }
}
Entity framework config code
public sealed class ScheduleConfig : EntityTypeConfiguration<Schedule>
{
public ScheduleConfig()
{
HasKey(q =>
new
{
q.BabyId,
q.VaccineId
});
HasRequired(t => t.Baby)
.WithMany(t => t.Schedules)
.HasForeignKey(t => t.BabyId);
HasRequired(t => t.Vaccine)
.WithMany(t => t.Schedules)
.HasForeignKey(t => t.VaccineId);
ToTable("Schedule", "dbo");
}
}
the following code update tables in database
public bool Update(T t)
{
var entityName = GetEntityName<T>();
object originalItem;
var key = ((IObjectContextAdapter)Context).ObjectContext.CreateEntityKey(entityName, t);
if (((IObjectContextAdapter)Context).ObjectContext.TryGetObjectByKey(key, out originalItem))
{
((IObjectContextAdapter)Context).ObjectContext.ApplyCurrentValues(key.EntitySetName, t);
}
Context.SaveChanges();
return true;
}
The problem is when I change one of key values ,the code inside If block in update method never execute and the table never updates.
My question is should I change my Model or is there any better code that can handle this problem.
Any idea?

NHibernate Envers: Cannot insert duplicate key in object

I'm using Envers to audit tables, but it's creating some audit tables for unknown/absent tables.
It's looks like a Many To Many relation audit table for Many To One relations.
Is this right? If it's, Why?
dbo.HorarioFixo - OK
dbo.HorarioFixo_Auditoria - OK
dbo.HorarioFixo_JanelaHorarioFixo_Auditoria - NOK
dbo.JanelaHorarioFixo - OK
dbo.JanelaHorarioFixo_Auditoria - OK
But when I try to remove/delete and HorarioFixo I'm getting an error.
The error I'm getting:
NHibernate.Exceptions.GenericADOException
could not execute batch command.[SQL: SQL not available]
em NHibernate.Engine.ActionQueue.BeforeTransactionCompletionProcessQueue.BeforeTransactionCompletion()
em NHibernate.Impl.SessionImpl.BeforeTransactionCompletion(ITransaction tx)
em NHibernate.Transaction.AdoTransaction.Commit()
em Foo.Testes.Servicos.TesteCanalDeTransmissaoService.RemoveDependenciasCorretamente() na TesteCanalDeTransmissaoService.cs: line 195
System.Data.SqlClient.SqlException
Violation of PRIMARY KEY constraint 'PK__HorarioF__450088476960C81E'. Cannot insert duplicate key in object 'dbo.HorarioFixo_JanelaHorarioFixo_Auditoria'.
Violation of PRIMARY KEY constraint 'PK__HorarioF__450088476960C81E'. Cannot insert duplicate key in object 'dbo.HorarioFixo_JanelaHorarioFixo_Auditoria'.
The statement has been terminated.
The statement has been terminated.
This is the SQL duplicated:
exec sp_executesql N'INSERT INTO HorarioFixo_JanelaHorarioFixo_Auditoria (REVTYPE, REV, HorarioFixoId, JanelaHorarioFixoId) VALUES (#p0, #p1, #p2, #p3)',N'#p0 tinyint,#p1 int,#p2 bigint,#p3 bigint',#p0=2,#p1=3,#p2=1,#p3=2 go
All this is a part of the code. If you need something more, leave a comment.
My classes:
public class Entidade
{
protected Entidade();
public virtual long Id { get; set; }
public virtual long Version { get; set; }
public abstract override bool Equals(object obj);
public override int GetHashCode();
}
public class Horario : Entidade
{
protected Horario()
{
}
}
public class HorarioFixo : Horario
{
public virtual int Frequencia { get; set; }
public virtual ICollection<JanelaHorarioFixo> JanelasRemessa { get; set; }
public virtual ICollection<JanelaHorarioFixo> JanelasRetorno { get; set; }
}
public class JanelaHorarioFixo : Entidade
{
public virtual TimeSpan HorarioInicio { get; set; }
public virtual TimeSpan? HorarioLimite { get; set; }
}
My mappings:
public class HorarioMap : ClassMapping<Horario>
{
public HorarioMap()
{
Id(x => x.Id, mapper =>
{
mapper.Generator(Generators.Identity);
mapper.UnsavedValue(0);
});
}
}
public class HorarioFixoMap : JoinedSubclassMapping<HorarioFixo>
{
public HorarioFixoMap()
{
Property(x => x.Frequencia);
Bag(x => x.JanelasRemessa, m =>
{
m.Cascade(Cascade.All);
m.Lazy(CollectionLazy.NoLazy);
}, map => map.OneToMany());
Bag(x => x.JanelasRetorno, m =>
{
m.Cascade(Cascade.All);
m.Lazy(CollectionLazy.NoLazy);
}, map => map.OneToMany());
}
}
public class JanelaHorarioFixoMap : ClassMapping<JanelaHorarioFixo>
{
public JanelaHorarioFixoMap()
{
Id(x => x.Id, mapper =>
{
mapper.Generator(Generators.Identity);
mapper.UnsavedValue(0);
});
Property(x => x.HorarioInicio, m => m.NotNullable(true));
Property(x => x.HorarioLimite, m => m.NotNullable(false));
}
}
NH and Envers configurations:
var ormHelper = ORMHelperUtils.GetORMHelper();
var mapper = new MyConventionModelMapper();
_config = new Configuration();
mapper.AddMappings(ormHelper.GetMappings());
mapper.AddMapping(typeof(REVINFOMap));
ormHelper.SetupApplicationNeeds(_config);
_config.AddMapping(mapper.CompileMappingForAllExplicitlyAddedEntities());
_config.SetProperty(Environment.CurrentSessionContextClass, "call");
if (ormHelper.UseEnvers)
{
var classesDominio = ormHelper.GetDomainTables();
if (classesDominio.Any())
{
var envers = new FluentConfiguration();
envers.Audit(classesDominio);
envers.SetRevisionEntity<REVINFO>(e => e.Id, e => e.Date, new CustomRevisionListener());
_config.SetEnversProperty(ConfigurationKey.AuditTableSuffix, "_Auditoria");
_config.IntegrateWithEnvers(envers);
}
}

I've just changed my class to
public class HorarioFixo : Horario
{
public virtual int Frequencia { get; set; }
public virtual ICollection<JanelaHorarioFixo> Janelas { get; set; }
}
And added a property to JanelaHorarioFixo to identify the type. But the table dbo.HorarioFixo_JanelaHorarioFixo_Auditoria is still there, and I don't know why.

If you use unidirectional one-to-many, Envers needs a link table to be able to have correct history.
If you use bidirectional one-to-many, no link table is needed.
See this answer.

Fluent nHibernate mapping problem

I have these tables/classes (example):
table FirstTable (
Id INTEGER NOT NULL DEFAULT AUTOINCREMENT,
Name VARCHAR(100) NOT NULL,
Document VARCHAR(20) NOT NULL
)
table SecondTable (
Id INTEGER NOT NULL,
Something VARCHAR(100) NULL,
FOREIGN KEY (Id) REFERENCES FirstTable (Id)
)
public class FirstClass {
public string Name { get; set; }
public string Document { get; set; }
public SecondClass SecondClass { get; set; }
}
public class SecondClass {
public string Something { get; set; }
public FirstClass FirstClass { get; set; }
}
The mapping is:
public class FirstClassMap : ClassMap<FirtsClass> {
Table("FirstTable");
Id(x => x.Id).GeneratedBy.Identity();
Map(x => x.Name);
Map(x => x.Document);
References(x => x.SecondClass, "Id").ForeignKey();
}
public class SecondClassMap : ClassMap<SecondClass> {
Table("SecondTable");
Id(x => x.Id).GeneratedBy.Foreign("FirstClass");
Max(x => x.Something);
HasOne(x => x.FirstClass).PropertyRef(x => x.SecondClass).Cascade.SaveUpdate();
}
FirstClass can have (0,1) SecondClass, and SecondClass can have (1,1) FirstClass.
The bellow code return the error "attempted to assign id from null one-to-one property: SecondClass"
var test = new SecondClass();
test.FirstClass = new FirstClass();
test.Something = "New test";
test.FirstClass.Name = "My name";
test.FirstClass.Document = "My document";
// ... commands to save.

It seems like NH is trying to save SecondClass first and fails to grab a generated ID from the not yet saved FirstClass.
Try to move the .Cascade.SaveUpdate() to the References declaration in FirstClassMap and call the save command on FirstClass.