private void EnsureExisting()
{
if (!_existingLoaded)
{
_existingLoaded = true;
if (!string.IsNullOrEmpty(Item.Id()))
{
var aml = Conn.AmlContext;
var query = aml.Item(Item.Type(), aml.Id(Item.Id()), aml.Action("get"));
if (QueryDefaults != null)
{
QueryDefaults.Invoke(query);
}
var items = query.Apply(Conn).Items();
if (items.Any())
{
_existing = items.Single();
}
else
{
_existing = Client.Item.GetNullItem <IReadOnlyItem>();
}
}
else
{
_existing = Client.Item.GetNullItem <IReadOnlyItem>();
}
}
}
private void EnsureNewVersion()
{
if (!_newLoaded)
{
_newLoaded = true;
var props = OldVersion.LazyMap(Conn, i => new
{
ConfigId = i.ConfigId().Value,
Generation = i.Generation().AsInt()
});
var aml = Conn.AmlContext;
var query = aml.Item(OldVersion.Type(), aml.Action("get"),
aml.ConfigId(props.ConfigId),
aml.Generation(props.Generation + 1)
);
if (QueryDefaults != null)
{
QueryDefaults.Invoke(query);
}
_newVersion = query.Apply(Conn).AssertItem();
}
}