private IList <EntityRecord> RunIncludeForEntityRef(IList <EntityRecord> records, EntityMemberInfo refMember)
{
if (records.Count == 0)
{
return(_emptyList);
}
var fkMember = refMember.ReferenceInfo.FromKey.ExpandedKeyMembers[0].Member; // r.Book_Id
var fkValues = GetMemberValues(records, fkMember);
var cmd = refMember.ReferenceInfo.ToKey.SelectByKeyArrayCommand;
var newRecs = _session.ExecuteSelect(cmd, fkValues);
if (newRecs.Count == 0)
{
return(_emptyList);
}
// Set ref members in parent records
var targetPk = refMember.ReferenceInfo.ToKey;
foreach (var parentRec in records)
{
var fkValue = parentRec.GetValueDirect(fkMember);
if (fkValue == DBNull.Value)
{
parentRec.SetValueDirect(refMember, DBNull.Value);
}
else
{
var pkKey = new EntityKey(targetPk, fkValue);
//we lookup in session, instead of searching in results of Include query - all just loaded records are registered in session and lookup is done by key (it is fact dict lookup)
var targetRec = _session.GetRecord(pkKey);
parentRec.SetValueDirect(refMember, targetRec);
}
}
return(newRecs);
}
public static EntityRecord CloneAndAttach(EntitySession toSession, EntityRecord record, bool forceFullCopy = false)
{
if (record.Session == toSession)
{
return(record); //do not clone if it is already in this session
}
//If record with the same PK is already loaded in session, use it in result; otherwise, clone record from cache and attach
var sessionRec = toSession.GetRecord(record.PrimaryKey, LoadFlags.None);
if (sessionRec == null)
{
sessionRec = new EntityRecord(record); //make clone
toSession.Attach(sessionRec);
}
else if (sessionRec.Status == EntityStatus.Stub || forceFullCopy)
{
sessionRec.CopyOriginalValues(record);
}
sessionRec.SourceCacheType = CacheType.FullSet;
return(sessionRec);
}
