/// <summary>
/// Get a DmRow by its primary key (composed by a multi columns key)
/// </summary>
public DmRow FindByKey(object[] key)
{
if (!primaryKey.HasValue)
{
return(null);
}
return(this.Rows.FirstOrDefault(r => primaryKey.ValuesAreEqual(r, key)));
}
/// <summary>
/// Gets the parent rows for the given child row across the relation using the version given
/// </summary>
internal static DmRow[] GetParentRows(DmKey parentKey, DmKey childKey, DmRow childRow, DmRowVersion version)
{
object[] values = childRow.GetKeyValues(childKey, version);
if (IsKeyNull(values))
{
return new DmRow[] { parentKey.Table.NewRow() }
}
;
return(parentKey.Table.Rows.Where(r => parentKey.ValuesAreEqual(r, values)).ToArray());
}
/// <summary>
/// For a foreignkey, actually we have only one row
/// </summary>
internal static DmRow GetParentRow(DmKey parentKey, DmKey childKey, DmRow childRow, DmRowVersion version)
{
if (!childRow.HasVersion((version == DmRowVersion.Original) ? DmRowVersion.Original : DmRowVersion.Current))
{
if (childRow.tempRecord == -1)
{
return(null);
}
}
object[] values = childRow.GetKeyValues(childKey, version);
if (IsKeyNull(values))
{
return(null);
}
return(parentKey.Table.Rows.FirstOrDefault(r => parentKey.ValuesAreEqual(r, values)));
}
