My parent class:
public class SomeData
{
public virtual Schedule schedule { get; set; }
public virtual IEnumerable<SomeUser> SomeUsers{get;set}
}
Child class:
public class SomeUser : Entity
{
public virtual SomeData SomeData { get; set; }
public virtual IUser AssignedTo { get; set; }
}
SomeData has One-To-Many relation with SomeUser. Mapping is as below:
public class SomeDataMapping : NHibernateClassMapping<SomeData>
{
public SomeDataMapping()
{
References(x => x.Schedule).LazyLoad();
HasMany(x => x.SomeUser ).Inverse().Cascade.All()
.KeyColumn("Schedule_Id").Table("SomeUsers");
}
public class SomeUserMapping : ClassMap<SomeUser>
{
protected SomeUsersMapping()
{
Id(x => x.Id);
References(x =>
x.SomeData).Column("Schedule_Id").Class<SomeData>().Not.Nullable();
References(x =>
x.AssignedTo).Column("AssignedTo_Id").Class<User>().Not.Nullable();
Table("SomeUsers");
}
}
}
During the creation of the first Schedule which loads these data, it gets
saved fine but if I try to edit and save. I get the below error:
System.InvalidCastException: Unable to cast object of type
'WhereSelectListIterator`2[System.Int64,Project.Schedules.SomeUsers]' to
type 'NHibernate.Collection.IPersistentCollection'.
at NHibernate.Event.Default.FlushVisitor.ProcessCollection(Object
collection, CollectionType type)
at
NHibernate.Event.Default.AbstractVisitor.ProcessEntityPropertyValues(Object[]
values, IType[] types)
at
NHibernate.Event.Default.DefaultFlushEntityEventListener.OnFlushEntity(FlushEntityEvent
event)
at
Project.ORM.Core.Configurations.CourseFlushEntityEventListener.OnFlushEntity(FlushEntityEvent
e) in
Below code is where I map view data to domain object
schedule.SomeData.SomeUsers = viewDto.AssignedUserIds.Select(id => new
SomeUser
{
SomeData = schedule.SomeData,
AssignedTo = userRepo.FindBy(id)
});
The return type here is IEnumerable. If I convert it to List() and try to
save, i get the below error
System.InvalidCastException: Unable to cast object of type
'System.Collections.Generic.List`1[Project.Schedules.SomeUsers]' to type
'NHibernate.Collection.IPersistentCollection'.
I have tried setting SomeUser as IEnumberable, ICollection, IList, tried
updated the mapping using different option but not able to get over this. I
recently implement another HasMany relation mapping the exact same way and
it works fine.
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