nhibernate <bag> exception - illegal access to loading collection - nhibernate

Question

I am getting "illegal access to loading collection" exception while trying to populate "IList" property in Supplier Domain using NHibernate . I have tried all suggestions I got by googling but nothing seems to help :(
Here are my domain objects and .HBM files. I would greatly appreciate your help/suggestions.
Supplier Domain Object
namespace Inventory.DomainObjects
{
[Serializable]
public class Supplier
{
public virtual string SupplierID { get; set; }
public virtual string Name { get; set; }
public virtual string Description { get; set; }
public virtual IList<Address> Address { get; set; }
}
}
Address Domain Object
namespace Inventory.DomainObjects
{
[Serializable]
public class Address
{
public virtual int AddressID { get; set; }
public virtual string SupplierID { get; set; }
public virtual string Line1 { get; set; }
public virtual string Line2 { get; set; }
public virtual string Line3 { get; set; }
}
}
Supplier.HBM
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
namespace="Inventory.DomainObjects"
assembly="Inventory">
<class name="Supplier" table="Inv_Supplier">
<id name="SupplierID" column="SupplierId" type="string"/>
<property name="SupplierCode" column="Code" type="string"/>
<property name="Name" column="SupplierName" type="string"/>
<property name="Description" column="SupplierDescription" type="string"/>
<bag name="Address" cascade="all" inverse="true" lazy="true">
<key column="SupplierID" not-null="true"/>
<one-to-many class="Address" not-found="ignore"/>
</bag>
</class>
</hibernate-mapping>
Address.HBM
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
namespace="Inventory.DomainObjects"
assembly="Inventory">
<class name="Address" table="Inv_Supplier_Address" lazy="false">
<id name="AddressID" column="AddressId" type="integer"/>
<property name="Line1" column="Line1" type="string"/>
<property name="Line2" column="Line2" type="string"/>
<property name="Line3" column="Line3" type="string"/>
<many-to-one name="SupplierID" column="SupplierId" not-null="true" class="Supplier" />
</class>
</hibernate-mapping>

Answer 1

This looks suspicious:
<many-to-one name="SupplierID" column="SupplierId"
not-null="true" class="Supplier" />
Could you try removing the above line to see if the problem goes away?
If this fixes the problem you should add the many-to-one back as follows:
namespace Inventory.DomainObjects
{
[Serializable]
public class Address
{
public virtual int AddressID { get; set; }
// CHANGED: reference supplier object instead of ID
public virtual Supplier Supplier { get; set; }
public virtual string Line1 { get; set; }
public virtual string Line2 { get; set; }
public virtual string Line3 { get; set; }
}
}
then change your hbm mapping file like this (to reference the Supplier property instead of SupplierId
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
namespace="Inventory.DomainObjects"
assembly="Inventory">
<class name="Address" table="Inv_Supplier_Address" lazy="false">
<id name="AddressID" column="AddressId" type="integer"/>
<property name="Line1" column="Line1" type="string"/>
<property name="Line2" column="Line2" type="string"/>
<property name="Line3" column="Line3" type="string"/>
<many-to-one name="Supplier" column="SupplierId"
not-null="true" class="Supplier" />
</class>
</hibernate-mapping>