I've scoured Google and SO but haven't come across anyone having the same problem. Here is my model:
public class Hierarchy
{
public virtual Event Prerequisite { get; set; }
public virtual Event Dependent { get; set; }
public override bool Equals(object obj)
{
var other = obj as Hierarchy;
if (other == null)
{
return false;
}
else
{
return this.Prerequisite == other.Prerequisite && this.Dependent == other.Dependent;
}
}
public override int GetHashCode()
{
return (Prerequisite.Id.ToString() + "|" + Dependent.Id.ToString()).GetHashCode();
}
}
Here is my mapping:
public class HierarchyMap : ClassMap<Hierarchy>
{
public HierarchyMap()
{
CompositeId()
.KeyReference(h => h.Prerequisite, "PrerequisiteId")
.KeyReference(h => h.Dependent, "DependentId");
}
}
And here is the ever present result:
{"The entity 'Hierarchy' doesn't have an Id mapped. Use the Id method to map your identity property. For example: Id(x => x.Id)."}
Is there some special configuration I need to do to enable composite id's? I have the latest FNh (as of 6/29/2012).
Edit
I consider the question open even though I've decided to map an Id and reference the 2 Event's instead of using a CompositeId. Feel free to propose an answer.
I figured out this was due to auto mapping trying to auto map the ID
Even though i had an actual map for my class - it still tried to auto map the ID. Once i excluded the class from auto mapping, it worked just fine.
Related
I have a record structure where I have a parent record with many children records. On the same page I will have a couple queries to get all the children.
A later query I will get a record set when I expand it it shows "Proxy". That is fine an all for getting data from the record since everything is generally there. Only problem I have is when I go to grab the record "ID" it is always "0" since it is proxy. This makes it pretty tough when building a dropdown list where I use the record ID as the "selected value". What makes this worse is it is random. So out of a list of 5 items 2 of them will have an ID of "0" because they are proxy.
I can use evict to force it to load at times. However when I am needing lazy load (For Grids) the evict is bad since it kills the lazy load and I can't display the grid contents on the fly.
I am using the following to start my session:
ISession session = FluentSessionManager.SessionFactory.OpenSession();
session.BeginTransaction();
CurrentSessionContext.Bind(session);
I even use ".SetFetchMode("MyTable", Eager)" within my queries and it still shows "Proxy".
Proxy is fine, but I need the record ID. Anyone else run into this and have a simple fix?
I would greatly appreciate some help on this.
Thanks.
Per request, here is the query I am running that will result in Patients.Children having an ID of "0" because it is showing up as "Proxy":
public IList<Patients> GetAllPatients()
{
return FluentSessionManager.GetSession()
.CreateCriteria<Patients>()
.Add(Expression.Eq("IsDeleted", false))
.SetFetchMode("Children", Eager)
.List<Patients>();
}
I have found the silver bullet that fixes the proxy issue where you loose your record id!
I was using ClearCache to take care of the problem. That worked just fine for the first couple layers in the record structure. However when you have a scenario of Parient.Child.AnotherLevel.OneMoreLevel.DownOneMore that would not fix the 4th and 5th levels. This method I came up with does. I also did find it mostly presented itself when I would have one to many followed by many to one mapping. So here is the answer to everyone else out there that is running into the same problem.
Domain Structure:
public class Parent : DomainBase<int>
{
public virtual int ID { get { return base.ID2; } set { base.ID2 = value; } }
public virtual string Name { get; set; }
....
}
DomainBase:
public abstract class DomainBase<Y>, IDomainBase<Y>
{
public virtual Y ID //Everything has an identity Key.
{
get;
set;
}
protected internal virtual Y ID2 // Real identity Key
{
get
{
Y myID = this.ID;
if (typeof(Y).ToString() == "System.Int32")
{
if (int.Parse(this.ID.ToString()) == 0)
{
myID = ReadOnlyID;
}
}
return myID;
}
set
{
this.ID = value;
this.ReadOnlyID = value;
}
}
protected internal virtual Y ReadOnlyID { get; set; } // Real identity Key
}
IDomainBase:
public interface IDomainBase<Y>
{
Y ID { get; set; }
}
Domain Mapping:
public class ParentMap : ClassMap<Parent, int>
{
public ParentMap()
{
Schema("dbo");
Table("Parent");
Id(x => x.ID);
Map(x => x.Name);
....
}
}
ClassMap:
public class ClassMap<TEntityType, TIdType> : FluentNHibernate.Mapping.ClassMap<TEntityType> where TEntityType : DomainBase<TIdType>
{
public ClassMap()
{
Id(x => x.ID, "ID");
Map(x => x.ReadOnlyID, "ID").ReadOnly();
}
}
I'm creating a little application using Sharp Architecture, and I've run into a bug I can't figure out. I think it has something to do with the NHibernte mappings. In my HttpPost Create() method, my SaveOrUpdate call is trying to insert null into the table's primary key field. The declaration for the primary key in my model is public virtual int Id { get; protected set; }.
I checked newSprint.Id and it's zero. I think the problem's with my NHibernate Mappings, so I've included all of that below.
Here's the automapping configuration:
public class AutomappingConfiguration : DefaultAutomappingConfiguration
{
public override bool ShouldMap(System.Type type)
{
return type.GetInterfaces().Any(x =>
x.IsGenericType && x.GetGenericTypeDefinition() == typeof(IEntityWithTypedId<>));
}
public override bool ShouldMap(Member member)
{
return base.ShouldMap(member) && member.CanWrite;
}
public override bool AbstractClassIsLayerSupertype(System.Type type)
{
return type == typeof(EntityWithTypedId<>) || type == typeof(Entity);
}
public override bool IsId(Member member)
{
return member.Name == "Id";
}
}
The auto-persistence model generator:
public class AutoPersistenceModelGenerator : IAutoPersistenceModelGenerator
{
public AutoPersistenceModel Generate()
{
var mappings = AutoMap.AssemblyOf<Sprint>(new AutomappingConfiguration());
mappings.IgnoreBase<Entity>();
mappings.IgnoreBase(typeof(EntityWithTypedId<>));
mappings.Conventions.Setup(GetConventions());
mappings.UseOverridesFromAssemblyOf<AutoPersistenceModelGenerator>();
return mappings;
}
private static Action<IConventionFinder> GetConventions()
{
return c =>
{
c.Add<PrimaryKeyConvention>();
c.Add<CustomForeignKeyConvention>();
c.Add<HasManyConvention>();
c.Add<TableNameConvention>();
};
}
Thanks in advance for any help anyone can offer.
Edit
I figured out that the problem was with the Table Name Convention. Removing that from the AutoMapping configuration solved the problem. I've removed the extraneous code and added the TableNameConvention mapping in the hopes that someone can explain what specifically about it caused those problems.
public class TableNameConvention : IClassConvention
{
public void Apply(FluentNHibernate.Conventions.Instances.IClassInstance instance)
{
instance.Table(Inflector.Net.Inflector.Pluralize(instance.EntityType.Name));
}
}
Your IdGenerator is probably not right. You need to set an appropriate generator for your PrimaryKey. For example, Identity if you're using SQL Server.
I'm not sure how you set this with your setup, not very familiar with Fluent NH. My guess is PrimaryKeyConvention?
Given the classes below:
public class Address : Place
{
public virtual string Street { get; set; }
public virtual int Number { get; set; }
public override string WhereAmI
{
get { string.Format("{0} {1}", Street , Number); }
}
}
public abstract class Place : DomainEntity
{
public abstract string WhereAmI { get; }
}
When I use this mapping:
var autoMap = AutoMap.AssemblyOf<Party>()
.Override<Place>(map => map.IgnoreProperty(p => p.WhereAmI))
.Override<Address>(map => map.IgnoreProperty(p => p.WhereAmI))
.Where(type => type.Namespace != null && type.Namespace.Contains("Models"));
I still get the error: Could not find a setter for property 'WhereAmI' in class 'Address'
Things I did:
When i remove the property from the base class "Address" it works.
When i use .OverrideAll(map => map.IgnoreProperty("WhereAmI")) But I don't want it to be global because in another class i might use the same property name where I DO want to include this Property
Is there any way to get this to work other then to use an Interface?
I tried tracking down in the FluentNHibernate code exactly why the IgnoreProperty seems to break down when the property being ignored is coming from a base class, but ran out of time. It seems to work fine if the get-only property is not coming from a base class.
Anyway, the solution to your situation seems to be to create a custom IAutomappingConfiguration by inheriting from DefaultAutomappingConfiguration. See this stack overflow answer: How can I create a Fluent NHibernate Convention that ignores properties that don't have setters.
Here's the custom automapping configuration that I used successfully to automap the example entity you provided:
protected class CustomConfiguration : DefaultAutomappingConfiguration
{
public override bool ShouldMap (Member member)
{
if (member.IsProperty && member.IsPublic && !member.CanWrite)
{
return false;
}
return base.ShouldMap(member);
}
public override bool ShouldMap(Type type)
{
return type.Namespace != null && type.Namespace.Contains("Models");
}
}
And then its use:
var autoMap = AutoMap
.AssemblyOf<DomainEntity>(new CustomConfiguration());
Note that the Where clause in your example had to move into the custom configuration class as its not allowed to be chained if you are using a custom configuration instance.
I know this question has been raised in similar form multiple times, but none of the threads could give me the concrete answer to my question.
I use Fluent NHibernate and Fluent`s auto-mapping to map my domain entities. Right now, I use this convention class to set all properties NOT NULL:
public class NotNullColumnConvention : IPropertyConvention
{
public void Apply(FluentNHibernate.Conventions.Instances.IPropertyInstance instance)
{
instance.Not.Nullable();
}
}
The big question is:
What do I need to do, to allow single properties of my entity classes to be NULL?
Here is one of my entity classes:
public class Employee : Entity
{
public virtual string FirstName { get; set; }
public virtual string LastName { get; set; }
}
I´d be really pleased, if someone can finally help me out! All possible search string I have entered into Google return pages, marked as already visited...
Thanks,
Arne
EDIT: Changed title ... Want to allow NULL for single properties
Create an attribute :
[AttributeUsage(AttributeTargets.Property, AllowMultiple = false)]
public class CanBeNullAttribute : Attribute
{
}
And a convention :
public class CanBeNullPropertyConvention : IPropertyConvention, IPropertyConventionAcceptance
{
public void Accept(IAcceptanceCriteria<IPropertyInspector> criteria)
{
criteria.Expect(
x => !this.IsNullableProperty(x)
|| x.Property.MemberInfo.GetCustomAttributes(typeof(CanBeNullAttribute), true).Length > 0);
}
public void Apply(IPropertyInstance instance)
{
instance.Nullable();
}
private bool IsNullableProperty(IExposedThroughPropertyInspector target)
{
var type = target.Property.PropertyType;
return type.Equals(typeof(string)) || (type.IsGenericType && type.GetGenericTypeDefinition().Equals(typeof(Nullable<>)));
}
}
Drop the attribute on top of your properties.
I have two classes
public class Document
{
public virtual int Id { get; set; }
public virtual IList<File> Files { get; set; }
}
public class File
{
public virtual int Id { get; protected set; }
public virtual Document Document { get; set; }
}
with the following convention:
public class HasManyConvention : IHasManyConvention
{
public bool Accept(IOneToManyPart target)
{
return true;
}
public void Apply(IOneToManyPart target)
{
target.Cascade.All();
}
}
and these mapping overrides
public class DocumentMappingOverride : IAutoMappingOverride<Document>
{
public void Override(AutoMap<Document> mapping)
{
mapping.HasMany(x => x.Files)
.Inverse()
// this line has no effect
.Cascade.AllDeleteOrphan();
}
}
public class FileMappingOverride : IAutoMappingOverride<File>
{
public void Override(AutoMap<File> mapping)
{
mapping.References(x => x.Document).Not.Nullable();
}
}
I understand that I need to make an IClassConvention for Document to
change the cascade behaviour, however I can't get this to work!
If i do this:
public class DocumentConvention : IClassConvention
{
public bool Accept(IClassMap target)
{
return target.EntityType == typeof(Document);
}
public void Apply(IClassMap target)
{
target.SetAttribute("cascade", "all-delete-orphan");
}
}
I get: "The 'cascade' attribute is not declared."
If i do this:
public class DocumentConvention : IClassConvention
{
public bool Accept(IClassMap target)
{
return target.EntityType == typeof(Document);
}
public void Apply(IClassMap target)
{
target.HasMany<Document, File>(x => x.Files)
.Inverse()
.Cascade.AllDeleteOrphan();
}
}
Then I get:
"Duplicate collection role mapping Document.Files"
so i added:
mapping.IgnoreProperty(x => x.Files);
to my document mapping, but then Files is always empty.
What am I doing wrong?
How can I override the cascade rule for a single HasMany relationship?
Thanks
Andrew
P.s. Sorry for the cross post with this but I need to get this solved asap.
I know this was forever ago (in computer time) and you might have already solved this. In case you haven't or someone else with a similar question sees this, here goes:
I think you need to create a class that implements IHasManyConvention. IClassConvention modifies an IClassMap (the <class> element) target. cascade is not a valid attribute for <class> so that accounts for the first error. On your second attempt, you were re-mapping the collection, resulting in the "duplicate collection" error.
IHasManyConvention targets an IOneToManyPart, upon which you should be able to call Cascade.AllDeleteOrphan() or just SetAttribute("cascade", "all-delete-orphan") if the former didn't work for some reason.
EDIT
Sorry, I missed that you already had a IHasManyConvention. Since you want to override your convention for just one type, you should just change the Accept method on your convention for that type. Instead of return true;, pull in what you had on your DocumentConvention:
return target.EntityType == typeof(Document);
I believe that OneToManyPart.EntityType references the containing entity type (i.e. Document).