public void Load(Database db)
{
if (!_loaded)
{
lock (_loadLock)
{
if (!_loaded)
{
XrefsByListId = new Dictionary <long, X>();
QuerySet q = Dao.GetQuerySet(db);
q.Select <X>().Where(new AssignValue(ParentColumnName, Parent.IdValue, q.ColumnNameFormatter));
q.Execute(db);
// should have all the ids of L that should be retrieved
if (q.Results[0].DataTable.Rows.Count > 0)
{
List <long> ids = new List <long>();
foreach (DataRow row in q.Results[0].DataTable.Rows)
{
long id = Convert.ToInt64(row[ListColumnName]);
ids.Add(id);
X xref = new X();
xref.DataRow = row;
XrefsByListId.Add(id, xref);
}
QuerySet q2 = Dao.GetQuerySet(db);
QueryFilter filter = new QueryFilter(Dao.GetKeyColumnName <L>());
filter.In(ids.ToArray(), db.ParameterPrefix);
q2.Select <L>().Where(filter);
q2.Execute(db);
Initialize(q2.Results[0].DataTable, db);
}
_loaded = true;
}
}
}
}
private X EnsureXref(L item, Database db = null)
{
db = db ?? Database;
if (item.IdValue != null && XrefsByListId.ContainsKey(item.IdValue.Value))
{
return(XrefsByListId[item.IdValue.Value]);
}
else
{
if (item.IsNew)
{
item.Save(db);
}
X result = null;
QuerySet q = Dao.GetQuerySet(db);
q.Select <X>().Where(new QueryFilter(ListColumnName) == item.IdValue.Value && new QueryFilter(ParentColumnName) == Parent.IdValue);
q.Execute(db);
if (q.Results[0].DataTable.Rows.Count > 0)
{
result = new X();
result.DataRow = q.Results[0].DataTable.Rows[0];
}
else
{
result = new X();
result.SetValue(string.Format("{0}Id", Parent.GetType().Name), Parent.IdValue);
result.SetValue(string.Format("{0}Id", typeof(L).Name), item.IdValue);
result.Save(db);
XrefsByListId.Add(item.IdValue.Value, result);
}
return(result);
}
}
