/// <summary>
/// Is the given property name a reference to the primary key of the associated
/// entity construed by the given entity type?
/// For example, consider a fragment like order.customer.id
/// (where order is a from-element alias). Here, we'd have:
/// propertyName = "id" AND
/// owningType = ManyToOneType(Customer)
/// and are being asked to determine whether "customer.id" is a reference
/// to customer's PK...
/// </summary>
/// <param name="propertyName">The name of the property to check.</param>
/// <param name="owningType">The type represeting the entity "owning" the property</param>
/// <returns>True if propertyName references the entity's (owningType->associatedEntity) primary key; false otherwise.</returns>
private bool IsReferenceToPrimaryKey(string propertyName, EntityType owningType)
{
IEntityPersister persister = SessionFactoryHelper.Factory.GetEntityPersister(owningType.GetAssociatedEntityName());
if (persister.EntityMetamodel.HasNonIdentifierPropertyNamedId)
{
// only the identifier property field name can be a reference to the associated entity's PK...
return(propertyName == persister.IdentifierPropertyName && owningType.IsReferenceToPrimaryKey);
}
// here, we have two possibilities:
// 1) the property-name matches the explicitly identifier property name
// 2) the property-name matches the implicit 'id' property name
if (EntityPersister.EntityID == propertyName)
{
// the referenced node text is the special 'id'
return(owningType.IsReferenceToPrimaryKey);
}
string keyPropertyName = SessionFactoryHelper.GetIdentifierOrUniqueKeyPropertyName(owningType);
return(keyPropertyName != null && keyPropertyName == propertyName && owningType.IsReferenceToPrimaryKey);
}
