Hi Paul,
Here are sample classes and mappings, note that those mappings
classes will work just with the change ("if (collection.Relationship !
= null)") at ManyToManyPart<TChild>.GetCollectionMapping, or else
you'll get a NullReferenceException. As I could see in the fnh unit
tests there are implementations for IDictionary of ValueTypes/
ValueTypes, Entities/Entities and ValueTypes/Entities but nothing of
Entities/ValueTypes, and I also agree that those interfaces are
confusing, I really would like to contribute in their design (I don't
like to be just "asking" for corrections or implementations) but for
now my time is running to short so I'll have to let this to some point
in the future :-( (I'll probably can breathe better in a couple
months).
class Group
{
public long ID
{ get; private set; }
public IDictionary<User, bool> Users
{ get; private set; }
}
class User
{
public long ID
{ get; private set; }
public IDictionary<Group, bool> Groups
{ get; private set; }
}
class GroupMap:ClassMap<Group>
{
public GroupMap()
{
base.Table("Groups");
base.Id(x => x.ID,
"ID").GeneratedBy.Native().Access.BackingField();
base.HasManyToMany<IDictionary<User, bool>>(x =>
x.Users).Access.BackingField().
Table("GroupUsers").ParentKeyColumn("GroupID").
AsMap(null).AsTernaryAssociation("UserID",
"IsManager").
Element("IsManager", x => x.Type<bool>());
/* Expected:
<map access="backfield" name="Groups"
table="GroupUsers" mutable="true">
<key>
<column name="GroupID" />
</key>
<index-many-to-many
class="ConsoleApplication22.User, ConsoleApplication22,
Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
<column name="UserID" />
</index-many-to-many>
<element type="System.Boolean, mscorlib,
Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<column name="IsManager" />
</element>
</map>
*/
}
}
class UserMap : ClassMap<User>
{
public UserMap()
{
base.Table("Users");
base.Id(x => x.ID,
"ID").GeneratedBy.Native().Access.BackingField();
base.HasManyToMany<IDictionary<Group, bool>>(x =>
x.Groups).Access.BackingField().
Table("GroupUsers").ParentKeyColumn("UserID").
AsMap(null).AsTernaryAssociation("GroupID",
"IsManager").
Element("IsManager", x => x.Type<bool>());
/* Expected:
<map access="backfield" name="Groups"
table="GroupUsers" mutable="true">
<key>
<column name="UserID" />
</key>
<index-many-to-many
class="ConsoleApplication22.Group, ConsoleApplication22,
Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
<column name="GroupID" />
</index-many-to-many>
<element type="System.Boolean, mscorlib,
Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<column name="IsManager" />
</element>
</map>
*/
}
}
On Mar 7, 9:05 pm, Paul Batum <paul.ba...@gmail.com> wrote:
> The fluent interface for maps is really confusing, and I'm partially
> responsible for that so I apologise.
>
> I think (though I am not certain) the problem in this case is that you are
> calling both AsTernaryAssociation and Element. From what I can recall, only
> one of those two methods should be called.
>
> Can you provide your classes and the expected xml? I would like to look into
> this further.
>
> Thanks,
>
> Paul.
>
> On Mon, Mar 8, 2010 at 2:29 AM, Mira.D <mirapalh...@gmail.com> wrote:
> > Refering:
>
> >http://groups.google.com/group/fluent-nhibernate/browse_thread/thread...
>
> >http://groups.google.com/group/fluent-nhibernate/browse_thread/thread...
>
> > I have been trying to map a ternary many-to-many association just
> > like above links but got some problems. After founding no way to do
> > that I have changed some stuff in
> > ManyToManyPart<TChild>.GetCollectionMapping and got that working:
>
> > Where we have:
>
> > // child columns
> > if (childColumns.Count == 0)
> > ((ManyToManyMapping)collection.Relationship).AddDefaultColumn(new
> > ColumnMapping { Name = typeof(TChild).Name + "_id" });
>
> > foreach (var column in childColumns)
> > ((ManyToManyMapping)collection.Relationship).AddColumn(new
> > ColumnMapping { Name = column });
>
> > I surounded with "if (collection.Relationship != null)" so I can
> > make the following map:
>
> > class MyEntity
> > {
> > public IDictionary<OtherEntity,ValueType> Others { get; private
> > set; }
> > }
>
> > The mapping:
>
> > base.HasManyToMany<IDictionary<OtherEntity, bool>>(x =>
> > x.Others).Access.BackingField().
> > Table("TABLE").
> > ParentKeyColumn("MY_ID").
> > AsMap(null).AsTernaryAssociation("OTHER_ID", "VALUE").
> > Element("VALUE", x => x.Type<ValueType>());
>
> > It produces this hbm:
>
> > <map access="backfield" name="Others" table="TABLE"
> > mutable="true">
> > <key>
> > <column name="MY_ID" />
> > </key>
> > <index-many-to-many class="OtherEntity">
> > <column name="OTHER_ID" />
> > </index-many-to-many>
> > <element type="ValueType">
> > <column name="VALUE" />
> > </element>
> > </map>
>
> > Without this change the GetCollectionMapping throws null reference
> > exception because the call "Element("VALUE", x =>
> > x.Type<ValueType>());" set the collection relationship to null.
>
> > Another strange thing is that I have to use
> > HasManyToMany<IDictionary<,>> because in
> > ManyToManyPart<TChild>.AsTernaryAssociation it first calls
> > EnsureGenericDictionary, witch check using the private field
> > childType, and after use typeof(TChild).GetGenericArguments(),
> > throwing a "index out of bounds", and if I'm mapping
> > IDictionary<ValueType, OtherEntity> I have to use
> > HasManyToMany<OtherEntity> or else my mapping will get <many-to-many
> > class="KeyParValue........">.
>
> > Regards,
> > DM
>
> > --
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