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Automapper ignore all mapping where value is null or default value

I'm using automapper via DI and want to have generic rules for all the mappings found in my solution. Belows example is of a single class, however I've got hundreds of classes to maintain and therefore want to add it to the mapper, not the mapping profile.
So far, I can handle Null values as follows :
cnfg.ForAllMembers(opts => opts.Condition((src, dest, srcMember) => srcMember != null)));
Which in my example below, allows for the null update to persist past all the subsiquent updates. What I want is a generic rule ( or statement) for the default value of Guids, DateTimeOffset and Int. In my example below, update 1 and 2 are lost once update 3 is mapped.
using System;
using Autofac;
using AutoMapper;
namespace AutoMapperProblem
{
public class Program
{
static void Main(string[] args)
{
var builder = new ContainerBuilder();
builder.RegisterInstance(new MapperConfiguration(cfg =>
{
cfg.AddMaps(typeof(Program).Assembly);
cfg.ForAllMaps((obj, cnfg) =>
cnfg.ForAllMembers(opts => opts.Condition((src, dest, srcMember) => srcMember != null)));
}).CreateMapper()).As<IMapper>().SingleInstance();
var container = builder.Build();
var mapper = container.Resolve<IMapper>();
var MainObject = new MainObject();
//this update persists pass all updates
var updateNull = new UpdateObject { NullGuid = Guid.NewGuid() };
mapper.Map(updateNull, MainObject);
var update1 = new UpdateObject { DateTimeOffset = DateTimeOffset.Now };
mapper.Map(update1, MainObject);
var update2 = new UpdateObject { Guid = Guid.NewGuid() };
mapper.Map(update2, MainObject);
var update3 = new UpdateObject { Int = 10 };
mapper.Map(update3, MainObject);
}
}
public class MappingProfile : Profile
{
public MappingProfile()
{
CreateMap<MainObject, UpdateObject>()
.ReverseMap();
}
}
public class MainObject
{
public Guid? NullGuid { get; set; }
public Guid Guid { get; set; }
public int Int { get; set; }
public DateTimeOffset DateTimeOffset { get; set; }
}
public class UpdateObject
{
public Guid? NullGuid { get; set; }
public Guid Guid { get; set; }
public int Int { get; set; }
public DateTimeOffset DateTimeOffset { get; set; }
}
}
I want it to work based on the type, eg ints, DateTimeOffsets and Guid's .
Heres a working example on DotNetFiddle : https://dotnetfiddle.net/Zh0ta6
Thanks for any help with this

The problem is that you cannot check value types against null in your opts.Condition() check, as they always have a value. Also, you can't use the default keyword directly in this specific context because the variable type is object. That will turn default to null again, and fail.
Depending on what you want to do, you can check if the destination already have a non-default value and do NOT replace it with any source value, which might be the default value of the type (0 for int, 0000...-000 for Guid, etc.). The check could look like this:
cnfg.ForAllMembers(opts => opts.Condition((src, dest, srcMember, destMember) =>
{
object destDefaultValue = null;
if (destMember != null)
{
Type destType = destMember.GetType();
if (destType.IsValueType)
{
destDefaultValue = Activator.CreateInstance(destType);
}
else
{
destDefaultValue = null;
}
}
bool destinationHasNoValue = Object.Equals(destMember, destDefaultValue);
return destinationHasNoValue;
})
The first part is calculating the default value for the given destination value, based on the type of the destination value. The latter part is checking if the destination already have a non-default value or not. Consecutive calls of Map() with the same target object will fill the "missing" property values until all the property values are set (in this example). If necessary, check the srcMember value and it's default type as well to fine-tune when the value should be copied or not.

Null value on SQL statement include the result of a SELECT query on the row (show the SQL query you sent and the result from that query)

I am working on a project , in order to use the Identity features in the last steps, I had to make some changes on database and add Identity to it. Also, inherit DatabaContext from IdentityDbContext. In my previous method I used to make a new object of DatabaseContext and work on it :
private DatabaseContext db = new DatabaseContext();
But with the new changes, when I pass the model to View or apply a conditional input, it returns a null value, for example, the following code:
public JsonResult CheckUserNameAvailability(Int32 UserCode)
{
var SearchData = db.Persons.Where(p => p.Pcode == UserCode).FirstOrDefault();////this line
if (SearchData != null)
{
TempData["code"] = 0;
return Json(1);
}
else
{
TempData["code"] = UserCode;
return Json(0);
}
}
On the line
var SearchData = db.Persons.Where (p => p.Pcode == UserCode) .FirstOrDefault();
return Error
System.Data.SqlTypes.SqlNullValueException: 'Data is Null. This method or property cannot be called on Null values.
even though the database is not empty and this code used to work properly. If someone could provide some assistance, it would be terrific!
and This is Model:
namespace LeaveSheet.Models
{
public class Person
{
[Key]
public Int32 Id { get; set; }
public Int32 Pcode { get; set; }
public string Name { get; set; }
public string Family { get; set; }
}
}
codes in startup.cs
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<DatabaseContext>(p => p.UseSqlServer(#"Data Source =. ; Initial Catalog = LeaveSheet; Integrated Security=True;MultipleActiveResultSets=true "));
services.AddControllersWithViews();
services.AddIdentity<User, Role>().AddEntityFrameworkStores<DatabaseContext>().AddDefaultTokenProviders();
}

Check whether the ID column in person table has always a value.
Even though it is the key column in model, check whether it is same in DB as well.

How to create DevExpress XPO dynamically with multiple primary-keys table?

I try example in this topic
https://github.com/DevExpress-Examples/XPO_how-to-create-an-xpclassinfo-descendant-to-dynamically-build-a-persistent-class-structure-e1729
But It only works for single primary key tables. So i searched more Found this:
https://github.com/DevExpress-Examples/XPO_how-to-create-persistent-classes-mapped-to-tables-with-a-composite-primary-key-at-runtime-e4606
Buts there's big different and I think its not satisfy because it speaking about composite key( one Key which have many columns)
So all I need please an example of creating XPO dynamically from SQL -Server Table:
My Table Schema as following
The XPOCollectionSource then binding to grid in server-mode… Thats all I need.
Code I Use
XPServerCollectionSource GetServerModeSourceForTable(IDbConnection connection, string tableName) {
XPDictionary dict = new ReflectionDictionary();
XPClassInfo classInfo = dict.CreateClass(dict.QueryClassInfo(typeof(LiteDataObject)),
tableName);
DBTable[] tables = ((ConnectionProviderSql)XpoDefault.GetConnectionProvider(connection,
AutoCreateOption.None)).GetStorageTables(tableName);
foreach (DBColumn col in tables[0].Columns) {
XPMemberInfo member = classInfo.CreateMember(col.Name, DBColumn.GetType(
col.ColumnType));
if (tables[0].PrimaryKey.Columns.Contains(col.Name))
member.AddAttribute(new KeyAttribute());
}
return new XPServerCollectionSource(new Session(XpoDefault.GetDataLayer(
connection, dict, AutoCreateOption.None)), classInfo);
}
At a glance. How to use XPServerCollectionSource with Dynamically created XPO object. with two primary keys.

https://github.com/DevExpress-Examples/XPO_how-to-create-persistent-classes-mapped-to-tables-with-a-composite-primary-key-at-runtime-e4606/blob/19.2.7%2B/CS/XpoConsoleApplication/XPComplexCustomMemberInfo.cs
This is a class must used. who need more details about that. I can help him for free.
Implementation can be like:
[NonPersistent]
public class XPDynamicObject : XPLiteObject
{
public XPDynamicObject(Session session) : base(session) {}
public XPDynamicObject(Session session, XPClassInfo classInfo) : base(session, classInfo) { }
}
Button_Click or any event :
XPDynamicObject.AutoSaveOnEndEdit = false;
ReflectionDictionary dic = new ReflectionDictionary();
var classInfo = dic.CreateClass(dic.GetClassInfo(typeof(XPDynamicObject)), "general.users");
// WE MUST get schema from database .... via ConnectionProviderSql this is only way
var provider = XpoDefault.GetConnectionProvider(MSSqlConnectionProvider.GetConnectionString("(local)", "testdb"), AutoCreateOption.None) as ConnectionProviderSql;
// Composite Key - this is only way to add composite key dynamically
XPComplexCustomMemberInfo user_key = new
XPComplexCustomMemberInfo(classInfo, "user_key", typeof(object), new KeyAttribute(), new PersistentAttribute(), new BrowsableAttribute(false));
user_key.AddSubMember("user_brn", typeof(int), new PersistentAttribute("user_brn"));
user_key.AddSubMember("user_num", typeof(int), new PersistentAttribute("user_num"));
var user_name = classInfo.CreateMember("user_name", typeof(string));
user_name.AddAttribute(new PersistentAttribute("user_name"));
dal = new SimpleDataLayer(dic, provider);
XPServerCollectionSource xpServerCollectionSource = new XPServerCollectionSource(session, classInfo); // XPServerCollectionSource Only Editable server-mode datasource via ALlowNew, AllowEdit, AllowRemove properties
GridControl.DataSource = xpServerCollectionSource ;
Full Cheat Sheet (Design-Time and Run-Time XPOs)
For Searching for Object by Key or Condition use following:
Edit: 2021-05-24
For those who asks about Associations with composite keys. Its really nightmare. By default Xpo doesn't provide that. instead you can use a Session.GetObjectByKey() in child-class and a new XPCollection in parent class. But actually its something little slowly that native way with an artificial key.
At a glance: Use Artifcial / Single Key Column for Better any ORM
compatibility. Otherwise It will be nightmare in database later. If
you for example support another or replace current ORM.
Here's a code for associations with composite keys. (Note that you need to convert it dynamically like above pictures. You maybe need to create custom XPMemberInfo and override GetValue() to return Session.GetObjectByKey() and create new XPCollection. (really bad stuff to do and worst ever and non-supported ever by Xpo. So Composite-Keys technically are bad way except if you need create Single Table bind it to grid. EX:- SalesOrderDetail table which doesn't have more child tables)
[Persistent("users")]
public class user : XPLiteObject
{
public user(Session session) : base(session) { }
public user(Session session, XPClassInfo classInfo) : base(session, classInfo) { }
[Key, Persistent]
public user_key user_key { get; set; }
[Persistent("user_name")]
public string user_name { get; set; }
private XPCollection<Trans> _trans;
public XPCollection<Trans> trans
{
get
{
if (_trans == null)
_trans = new XPCollection<Trans>(Session, CriteriaOperator.Parse($"user_brn = {user_key.user_brn} AND user_num = {user_key.user_num}"));
return _trans;
}
}
}
public class Trans : XPLiteObject
{
public Trans(Session session) : base(session) { }
public Trans(Session session, XPClassInfo classInfo) : base(session, classInfo) { }
[Key,Persistent("TransID")]
public int TransID { get; set; }
public int user_brn { get; set; }
public int user_num { get; set; }
public user user
{
get
{
var key = new user_key();
key.user_brn = 1;
key.user_num = 3;
var obj = Session.GetObjectByKey<user>(key, true);
return obj;
}
}
}
// Composite-Key
public struct user_key
{
[Persistent("user_brn")]
public int user_brn { get; set; }
[Persistent("user_num")]
public int user_num { get; set; }
}
A Dynamic run-time version from above model:
class XPCompositeAssociationMemberInfo : XPCustomMemberInfo
{
public XPCompositeAssociationMemberInfo(XPClassInfo owner, string propertyName, Type propertyType, XPClassInfo referenceType, bool nonPersistent, bool nonPublic) : base(owner, propertyName, propertyType, referenceType, nonPersistent, nonPublic)
{
}
public override object GetValue(object theObject)
{
XPDynamicObject val = theObject as XPDynamicObject;
if(val != null)
{
var user_num = val.GetMemberValue("user_num");
IdList vals = new IdList();
vals.Add(1);
vals.Add(user_num);
return val.Session.GetObjectByKey(ReferenceType, vals);
}
return val;
}
}
XPDynamicObject.AutoSaveOnEndEdit = false;
ReflectionDictionary dic = new ReflectionDictionary();
var userClassInfo = dic.CreateClass(dic.GetClassInfo(typeof(XPDynamicObject)), "users");
// WE MUST get schema from database .... via ConnectionProviderSql this is only way
var provider = XpoDefault.GetConnectionProvider(MSSqlConnectionProvider.GetConnectionString("(local)", "testdb"), AutoCreateOption.None) as ConnectionProviderSql;
//DBTable Table = provider.GetStorageTables("users")[0];
// Composite Key - this is only way to add composite key dynamically
XPComplexCustomMemberInfo user_key = new XPComplexCustomMemberInfo(userClassInfo, "user_key", typeof(object), new KeyAttribute(), new PersistentAttribute(), new BrowsableAttribute(false));
user_key.AddSubMember("user_brn", typeof(int), new PersistentAttribute("user_brn"));
user_key.AddSubMember("user_num", typeof(int), new PersistentAttribute("user_num"));
var user_name = userClassInfo.CreateMember("user_name", typeof(string));
user_name.AddAttribute(new PersistentAttribute("user_name"));
var transClassInfo = dic.CreateClass(dic.GetClassInfo(typeof(XPDynamicObject)), "Trans");
var TransID = transClassInfo.CreateMember("TransID", typeof(int), new KeyAttribute());
var user_brn = transClassInfo.CreateMember("user_brn", typeof(int));
var user_num = transClassInfo.CreateMember("user_num", typeof(int));
XPCompositeAssociationMemberInfo userMI = new XPCompositeAssociationMemberInfo(transClassInfo, "user", typeof(object), userClassInfo, true, false);
dal = new SimpleDataLayer(dic, provider);
Session session = new Session(dal);
XPServerCollectionSource xpServerCollectionSource = new XPServerCollectionSource(session, transClassInfo); // XPServerCollectionSource Only Editable server-mode datasource via ALlowNew, AllowEdit, AllowRemove properties
xpServerCollectionSource.DisplayableProperties = "TransID;user.user_key.user_num;user.user_name";
Finally, IMPORTANT !
Its really very very hard to achieve Composite-Keys cases at runtime
in any Xpo. Instead replace with Single Column Key(Identity or
Artificial one. GUID one etc.)

I don't know if this is what you want, but I'll share my code using XPInstantFeedbackSource.
You can get more information at How To Implement The Instant Feedback Mode Xpo
XPLiteObject LogXPOModel
[Persistent("log.t_log")]
public class LogXPOModel : XPLiteObject
{
[Key, DevExpress.Xpo.DisplayName("id")]
public long id { get; set; }
[Key, DevExpress.Xpo.DisplayName("recv_time")]
public long recv_time
...
}
Window MainWindow
public class MainWindow : Window
{
public XPInstantFeedbackSource SqliteXPInstantFeedbackSource
public MainWindow() {
...
SqliteXPInstantFeedbackSource = new XPInstantFeedbackSource();
SqliteXPInstantFeedbackSource.ObjectType = typeof(LogXPOModel);
SqliteXPInstantFeedbackSource.ResolveSession += SqliteXPInstantFeedbackSource_ResolveSession;
SqliteXPInstantFeedbackSource.DismissSession += SqliteXPInstantFeedbackSource_DismissSession;
View.Grid.ItemsSource = SqliteXPInstantFeedbackSource;
}
...
}
Like that — my table has two keys; and, it does not incur any problems.

EF Core SQLITE - SQLite Error 19: 'UNIQUE constraint failed

I am learning entity framework core, using it with SQLITE
I have 2 tables in the database.
Messages:
CREATE TABLE `Messages` (
`Id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
`IsDeleted` INTEGER NOT NULL,
`FromUserId` INTEGER,
`ToUserId` INTEGER,
`SendDate` TEXT NOT NULL,
`ReadDate` TEXT NOT NULL,
`MessageContent` TEXT,
CONSTRAINT `FK_Messages_Users_ToUserId` FOREIGN KEY(`ToUserId`) REFERENCES `Users`(`Id`) ON DELETE RESTRICT,
CONSTRAINT `FK_Messages_Users_FromUserId` FOREIGN KEY(`FromUserId`) REFERENCES `Users`(`Id`) ON DELETE RESTRICT
);
and Users table:
CREATE TABLE `Users` (
`Id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
`IsDeleted` INTEGER NOT NULL,
`Name` TEXT,
`DisplayName` TEXT,
`Gender` INTEGER NOT NULL,
`BirthDate` TEXT NOT NULL
);
my c# classes look like:
public class User
{
public int Id {get;set;}
public bool IsDeleted{get;set;}
[Required]
public string Name{get;set;}
public string DisplayName{get;set;}
[Required]
public char Gender{get;set;}
[Required]
public DateTime BirthDate{get;set;}
public User(string n, string dn, char g, DateTime bd)
{
Name=n; DisplayName = dn; Gender = g; BirthDate = bd;
}
protected User(){}
public override string ToString()
{
return string.Format("{0} ({1}) {2}", this.Name, this.Gender,this.BirthDate.ToShortDateString());
}
}
and Messages class:
public class Message
{
public int Id{get;set;}
public bool IsDeleted{get;set;}
[Required]
public Users.User FromUser{get;set;}
[Required]
public Users.User ToUser{get;set;}
[Required]
public DateTime SendDate{get;set;}
public DateTime? ReadDate{get;set;}
[Required]
public string MessageContent{get;set;}
protected Message(){}
public Message(User from, User to, string content)
{
this.FromUser = from;
this.ToUser = to;
this.MessageContent = content;
this.SendDate = DateTime.Now;
this.ReadDate = DateTime.Now;
}
}
users table works, but when I try to add a new entity to the messages by this:
public override int Insert(Message entity)
{
dbc.Messages.Add(entity);
dbc.SaveChanges();
return entity.Id;
}
I get the following error:
SQLite Error 19: 'UNIQUE constraint failed
I have no idea what is wrong. When I manually inserted data to a database (using DB browser for sqlite) it works.
Are the relationships in the classes ok?
My dbContextSnapshot is:
[DbContext(typeof(RandevouDbContext))]
partial class RandevouDbContextModelSnapshot : ModelSnapshot
{
protected override void BuildModel(ModelBuilder modelBuilder)
{
#pragma warning disable 612, 618
modelBuilder.HasAnnotation("ProductVersion", "2.1.4-rtm-31024");
modelBuilder.Entity("RandevouData.Messages.Message", b =>
{
b.Property<int>("Id")
.ValueGeneratedOnAdd();
b.Property<int>("FromUserId");
b.Property<bool>("IsDeleted");
b.Property<string>("MessageContent")
.IsRequired();
b.Property<DateTime?>("ReadDate");
b.Property<DateTime>("SendDate");
b.Property<int>("ToUserId");
b.HasKey("Id");
b.HasIndex("FromUserId");
b.HasIndex("ToUserId");
b.ToTable("Messages");
});
modelBuilder.Entity("RandevouData.Users.User", b =>
{
b.Property<int>("Id")
.ValueGeneratedOnAdd();
b.Property<DateTime>("BirthDate");
b.Property<string>("DisplayName");
b.Property<char>("Gender");
b.Property<bool>("IsDeleted");
b.Property<string>("Name")
.IsRequired();
b.HasKey("Id");
b.ToTable("Users");
});
modelBuilder.Entity("RandevouData.Messages.Message", b =>
{
b.HasOne("RandevouData.Users.User", "FromUser")
.WithMany()
.HasForeignKey("FromUserId")
.OnDelete(DeleteBehavior.Cascade);
b.HasOne("RandevouData.Users.User", "ToUser")
.WithMany()
.HasForeignKey("ToUserId")
.OnDelete(DeleteBehavior.Cascade);
});
#pragma warning restore 612, 618
}
By the way. I cannot configure mapping from two sides.
The Message entity has UserFrom and UserTo fields,
but the User entity can not have Messages, because one time he is "userFrom" and other time he can be "userTo".
And there is also a code, where i create Message entity
public int SendMessage(int senderId, int receiverId, string content)
{
var dao = new MessagesDao();
var usersDao = new UsersDao();
var userService = new UserService(mapper);
var sender = usersDao.Get(senderId);
var receiver = usersDao.Get(receiverId);
var entity = new Message(sender,receiver,content);
var id = dao.Insert(entity);
return id;
}
user dao where i override GET method
public override User Get(int id)
{
using (var context = new RandevouDbContext())
{
var user = dbc.Find<User>(id);
return user;
}
}
and MessagesDao where i override Add method
public override int Insert(Message entity)
{
using (var dc = new RandevouDbContext())
{
dc.Messages.Add(entity);
dc.SaveChanges();
return entity.Id;
}
}
btw, i dont know if it is ok, but i have 0 entries to update (!?)

To fix 'UNIQUE' constraint exceptions you need to make sure all the entities you're working with are being tracked by the context you want to save to.
e.g.
// Get user from one context
User thisUser = db.Users.Find(3);
//Now imagine you have another context which has been created later on
DbContext newContext = new DbContext();
//and you want to create a message, assign it to your user
//and save it to the new context
Message newMessage = new Message
{
Text = "Hello",
User = thisUser
}
newContext.Messages.Add(newMessage);
// saving this to newContext will fail because newContext is not tracking thisUser,
// Therefore attach it...
newContext.Users.Attach(thisUser).
//now newContext is tracking thisUser *AND* newMessage, so the save operation will work
newContext.SaveChanges();

Ok, i solved problems.
Read some articles about EF DbContext.
When i have used two other context's for GET User and CREATE message,
the entities (user1 and user2) were not the same entities which i have used for second context. I mean, the entiies were this same, but they had another tracking
EF Core / Sqlite one-to-many relationship failing on Unique Index Constraint
So i solved problem by using one context on one Business-Transaction (not one database transaction). Just moved creating context to business logic, and the Generic dao class was waiting for context in constructor, like this:
public class MessagesDao : BasicDao<Message>
{
public MessagesDao(RandevouDbContext dbc) : base(dbc)
{
}
public IQueryable<Message> QueryMessages()
{
return dbc.Messages.AsQueryable();
}
public override int Insert(Message entity)
{
dbc.Messages.Add(entity);
dbc.SaveChanges();
return entity.Id;
}
}
public abstract class BasicDao<TEntity> where TEntity : BasicRandevouObject
{
protected RandevouDbContext dbc;
public BasicDao(RandevouDbContext dbc) { this.dbc = dbc; }
public virtual int Insert(TEntity entity)
{
dbc.Add<TEntity>(entity);
dbc.SaveChanges();
return entity.Id;
}
public virtual void Update(TEntity entity)
{
dbc.Update(entity);
dbc.SaveChanges();
}
public virtual void Delete(TEntity entity)
{
dbc.Remove(entity);
dbc.SaveChanges();
}
public virtual TEntity Get(int id)
{
var entity = dbc.Find<TEntity>(id);
return entity;
}
}
and in business-logic code :
public int SendMessage(int senderId, int receiverId, string content)
{
using (var dbc = new RandevouDbContext())
{
var dao = new MessagesDao(dbc);
var usersDao = new UsersDao(dbc);
var userService = new UserService(mapper);
var sender = usersDao.Get(senderId);
var receiver = usersDao.Get(receiverId);
var entity = new Message(sender,receiver,content);
var id = dao.Insert(entity);
return id;
}
}
now everything works. By the way it is still dirty code, because i am just trying some things, but i hope if someone will have similiar problem then he will find this post.

What's missing from your (very detailed) question is the makeup of the Message you're passing to Insert(). Have you previously saved the two Users to the database, or are they two new objects, too? If they are new then their ID should be zero so that EF knows to create them first, prior to creating the Message.

Nhibernate loses previous item from AsSet collection when adding the first new one

i have a problem with Nhibernate collection mapped asSet, in few word when i add new item to collection all other item are lost.
but what is more strange is that those appens only once, every following insert give no problem since i restart app
this my object:
public class Attivita : BaseObject<Attivita, int> {
public override int Id { get; set; }
private ICollection<SAL> _statiAvanzamentoLavori = new List<SAL>();
public virtual IEnumerable<SAL> StatiAvanzamentoLavori {
get { return _statiAvanzamentoLavori.ToArray(); }
}
public virtual void AddSAL(DateTime dataRiferimento, DateTime dataAvvioPrevisto, DateTime dataConclusionePrevista) {
if (!(_statiAvanzamentoLavori.Any(x => x.DataRiferimento == dataRiferimento))){
SAL sal = new SAL{
DataRiferimento = dataRiferimento,
DataAvvioPrevisto = dataAvvioPrevisto,
DataConclusionePrevista = dataConclusionePrevista,
};
_statiAvanzamentoLavori.Add(sal);
}
}
}
public class SAL : EquatableObject<SAL>
{
protected internal virtual int id {get; set;}
public virtual DateTime DataRiferimento {get; set;}
public virtual DateTime DataAvvioPrevisto {get; set;}
public virtual DateTime DataConclusionePrevista {get; set;}
}
BaseObject override Equals using ID property
EquatableObject override Equals comparing all object property
the maps:
public AttivitaMap()
{
Table("Attivita_T041");
Id(x => x.Id)
.Column("Kint_T041_IdAttivita").GeneratedBy.Assigned();
HasMany<SAL>(x => x.StatiAvanzamentoLavori)
.Access.CamelCaseField(Prefix.Underscore)
.KeyColumns.Add("int_T018_IdAttivita", x => x.UniqueKey("IX18_1"))
.ForeignKeyConstraintName("FK18_IdAtt") .Not.LazyLoad().Cascade.All();
}
}
public SALMap()
{
Table("SAL_T018");
Id(x => x.id)
.Column("Kint_T018_IdSAL")
.GeneratedBy.Identity();
Map(x => x.DataRiferimento).UniqueKey("IX18_1")
.Not.Nullable();
Map(x => x.DataAvvioPrevisto);
Map(x => x.DataConclusionePrevista).Not.Nullable();
}
and finally the test:
[Test]
public void AttivitaRepositoryCanInsertSALOnNotEmptyCollection() {
var attivita = fixture.Create<Attivita>();
var SAL1 = fixture.Create<SAL>();
var SAL2 = fixture.Create<SAL>();
attivita.AddSAL(SAL1.DataRiferimento, SAL1.DataAvvioPrevisto, SAL1.DataConclusionePrevista);
using (UnitOfWork uow = GetUnitOfWork()) {
uow.Attivita.Update(attivita);
uow._session.Transaction.Commit();
}
using (UnitOfWork uow = GetUnitOfWork()) {
attivita = uow._session.Get<Attivita>(attivita.Id);
// this test pass
attivita.StatiAvanzamentoLavori.Count().Should().Be(1);
attivita.AddSAL(SAL2.DataRiferimento, SAL2.DataAvvioPrevisto, SAL2.DataConclusionePrevista, SAL2.StatoAvanzamentoAttivita);
uow.Attivita.Update(attivita);
uow._session.Transaction.Commit();
}
using (UnitOfWork uow = GetUnitOfWork()) {
// this test fails: expected 2 found 1
uow._session.Get<Attivita>(attivita.Id).StatiAvanzamentoLavori.Count().Should().Be(2);
var SAL3 = fixture.Build<SAL>().With(x => x.StatoAvanzamentoAttivita, statoAvanzamentoTest).Create();
using (UnitOfWork uow = GetUnitOfWork()) {
attivita = uow._session.Get<Attivita>(attivita.Id);
attivita.AddSAL(SAL3.DataRiferimento, SAL3.DataAvvioPrevisto, SAL3.DataConclusionePrevista, SAL3.StatoAvanzamentoAttivita);
uow.Attivita.Update(attivita);
uow._session.Transaction.Commit();
}
using (UnitOfWork uow = GetUnitOfWork()) {
uow._session.Get<Attivita>(attivita.Id).StatiAvanzamentoLavori.Count().Should().Be(3);
// this test fails: expected 3 found 2
}
}
}
so when i add the second sal the first is lost but when i add the third the second remain, why??
looking at SQL log i see that when i add the second SAL un update is fired to SAL TABLE settings IdAttivita to NULL, so link to Attivita is lost
i read here that removing and inserting all links is behaviour is by design with Bag collection but i have SET with primary key
More strange if i change AsSet to AsBag (or simply remove AsAet) for collection mapping all works fine, but i need Set for other things (like multiple fetch)

As answered by Nhibernate developer on their bugtracker problem was mixing Equals method: Value object must be compared by their properties and entity by their id
My fault was using peropery comparison with the entity SAL
So i swtich it to use BaseObject and all works fine