public static void Save(Entity[] entities)
{
if (entities == null || entities.Any(e => e == null))
{
throw new ArgumentNullException("entity");
}
using (var log = HeavyProfiler.LogNoStackTrace("PreSaving"))
{
Schema schema = Schema.Current;
DirectedGraph <Modifiable> modifiables = PreSaving(() => GraphExplorer.FromRoots(entities));
HashSet <Entity> wasNew = modifiables.OfType <Entity>().Where(a => a.IsNew).ToHashSet(ReferenceEqualityComparer <Entity> .Default);
HashSet <Entity> wasSelfModified = modifiables.OfType <Entity>().Where(a => a.Modified == ModifiedState.SelfModified).ToHashSet(ReferenceEqualityComparer <Entity> .Default);
log.Switch("Integrity");
var error = GraphExplorer.FullIntegrityCheck(modifiables);
if (error != null)
{
#if DEBUG
var withEntities = error.WithEntities(modifiables);
throw new IntegrityCheckException(withEntities);
#else
throw new IntegrityCheckException(error);
#endif
}
log.Switch("Graph");
GraphExplorer.PropagateModifications(modifiables.Inverse());
//colapsa modifiables (collections and embeddeds) keeping indentifiables only
DirectedGraph <Entity> identifiables = GraphExplorer.ColapseIdentifiables(modifiables);
foreach (var node in identifiables)
{
schema.OnSaving(node);
}
//Remove all the edges that doesn't mean a dependency
identifiables.RemoveEdges(identifiables.Edges.Where(e => !e.To.IsNew).ToList());
//Remove all the nodes that are not modified
List <Entity> notModified = identifiables.Where(node => !node.IsGraphModified).ToList();
notModified.ForEach(node => identifiables.RemoveFullNode(node, None));
log.Switch("SaveGroups");
SaveGraph(schema, identifiables);
foreach (var node in identifiables)
{
schema.OnSaved(node, new SavedEventArgs
{
IsRoot = entities.Contains(node),
WasNew = wasNew.Contains(node),
WasSelfModified = wasSelfModified.Contains(node),
});
}
EntityCache.Add(identifiables);
EntityCache.Add(notModified);
GraphExplorer.CleanModifications(modifiables);
}
}
public static FluentInclude <T> WithVirtualMList <T, L>(this FluentInclude <T> fi,
Expression <Func <T, MList <L> > > mListField,
Expression <Func <L, Lite <T> > > backReference,
Action <L, T> onSave = null,
Action <L, T> onRemove = null,
bool?lazyRetrieve = null,
bool?lazyDelete = null) //To avoid StackOverflows
where T : Entity
where L : Entity
{
var mListPropertRoute = PropertyRoute.Construct(mListField);
RegisteredVirtualMLists.GetOrCreate(typeof(T)).Add(typeof(L), mListPropertRoute);
if (lazyRetrieve == null)
{
lazyRetrieve = (typeof(L) == typeof(T));
}
if (lazyDelete == null)
{
lazyDelete = (typeof(L) == typeof(T));
}
Func <T, MList <L> > getMList = GetAccessor(mListField);
Action <L, Lite <T> > setter = null;
bool preserveOrder = fi.SchemaBuilder.Settings.FieldAttributes(mListPropertRoute)
.OfType <PreserveOrderAttribute>()
.Any();
if (preserveOrder && !typeof(ICanBeOrdered).IsAssignableFrom(typeof(L)))
{
throw new InvalidOperationException($"'{typeof(L).Name}' should implement '{nameof(ICanBeOrdered)}' because '{ReflectionTools.GetPropertyInfo(mListField).Name}' contains '[{nameof(PreserveOrderAttribute)}]'");
}
var sb = fi.SchemaBuilder;
if (lazyRetrieve.Value)
{
sb.Schema.EntityEvents <T>().Retrieved += (T e) =>
{
if (ShouldAvoidMListType(typeof(L)))
{
return;
}
var mlist = getMList(e);
if (mlist == null)
{
return;
}
var query = Database.Query <L>()
.Where(line => backReference.Evaluate(line) == e.ToLite());
MList <L> newList = preserveOrder ?
query.ToVirtualMListWithOrder() :
query.ToVirtualMList();
mlist.AssignAndPostRetrieving(newList);
};
}
if (preserveOrder)
{
sb.Schema.EntityEvents <T>().RegisterBinding <MList <L> >(mListField,
shouldSet: () => !lazyRetrieve.Value && !VirtualMList.ShouldAvoidMListType(typeof(L)),
valueExpression: e => Database.Query <L>().Where(line => backReference.Evaluate(line) == e.ToLite()).ExpandLite(line => backReference.Evaluate(line), ExpandLite.ToStringLazy).ToVirtualMListWithOrder(),
valueFunction: (e, retriever) => Schema.Current.CacheController <L>().Enabled ?
Schema.Current.CacheController <L>().RequestByBackReference <T>(retriever, backReference, e.ToLite()).ToVirtualMListWithOrder():
Database.Query <L>().Where(line => backReference.Evaluate(line) == e.ToLite()).ExpandLite(line => backReference.Evaluate(line), ExpandLite.ToStringLazy).ToVirtualMListWithOrder()
);
}
else
{
sb.Schema.EntityEvents <T>().RegisterBinding(mListField,
shouldSet: () => !lazyRetrieve.Value && !VirtualMList.ShouldAvoidMListType(typeof(L)),
valueExpression: e => Database.Query <L>().Where(line => backReference.Evaluate(line) == e.ToLite()).ExpandLite(line => backReference.Evaluate(line), ExpandLite.ToStringLazy).ToVirtualMList(),
valueFunction: (e, retriever) => Schema.Current.CacheController <L>().Enabled ?
Schema.Current.CacheController <L>().RequestByBackReference <T>(retriever, backReference, e.ToLite()).ToVirtualMList() :
Database.Query <L>().Where(line => backReference.Evaluate(line) == e.ToLite()).ExpandLite(line => backReference.Evaluate(line), ExpandLite.ToStringLazy).ToVirtualMList()
);
}
sb.Schema.EntityEvents <T>().PreSaving += (T e, PreSavingContext ctx) =>
{
if (VirtualMList.ShouldAvoidMListType(typeof(L)))
{
return;
}
var mlist = getMList(e);
if (mlist == null)
{
return;
}
if (mlist.Count > 0)
{
var graph = Saver.PreSaving(() => GraphExplorer.FromRoot(mlist).RemoveAllNodes(ctx.Graph));
GraphExplorer.PropagateModifications(graph.Inverse());
var errors = GraphExplorer.FullIntegrityCheck(graph);
if (errors != null)
{
throw new IntegrityCheckException(errors);
}
}
if (mlist.IsGraphModified)
{
e.SetSelfModified();
}
};
sb.Schema.EntityEvents <T>().Saving += (T e) =>
{
if (VirtualMList.ShouldAvoidMListType(typeof(L)))
{
return;
}
var mlist = getMList(e);
if (mlist == null)
{
return;
}
if (preserveOrder)
{
mlist.ForEach((o, i) => ((ICanBeOrdered)o).Order = i);
}
if (GraphExplorer.IsGraphModified(mlist))
{
e.SetModified();
}
};
sb.Schema.EntityEvents <T>().Saved += (T e, SavedEventArgs args) =>
{
if (VirtualMList.ShouldAvoidMListType(typeof(L)))
{
return;
}
var mlist = getMList(e);
if (mlist != null && !GraphExplorer.IsGraphModified(mlist))
{
return;
}
if (!(args.WasNew || ShouldConsiderNew(typeof(T))))
{
var oldElements = mlist.EmptyIfNull().Where(line => !line.IsNew);
var query = Database.Query <L>()
.Where(p => backReference.Evaluate(p) == e.ToLite());
if (onRemove == null)
{
query.Where(p => !oldElements.Contains(p)).UnsafeDelete();
}
else
{
query.Where(p => !oldElements.Contains(p)).ToList().ForEach(line => onRemove(line, e));
}
}
if (mlist != null)
{
if (mlist.Any())
{
if (setter == null)
{
setter = CreateSetter(backReference);
}
mlist.ForEach(line => setter(line, e.ToLite()));
if (onSave == null)
{
mlist.SaveList();
}
else
{
mlist.ForEach(line => { if (GraphExplorer.IsGraphModified(line))
{
onSave(line, e);
}
});
}
var priv = (IMListPrivate)mlist;
for (int i = 0; i < mlist.Count; i++)
{
if (priv.GetRowId(i) == null)
{
priv.SetRowId(i, mlist[i].Id);
}
}
}
mlist.SetCleanModified(false);
}
};
sb.Schema.EntityEvents <T>().PreUnsafeDelete += query =>
{
if (VirtualMList.ShouldAvoidMListType(typeof(L)))
{
return(null);
}
//You can do a VirtualMList to itself at the table level, but there should not be cycles inside the instances
var toDelete = Database.Query <L>().Where(se => query.Any(e => backReference.Evaluate(se).Is(e)));
if (lazyDelete.Value)
{
if (toDelete.Any())
{
toDelete.UnsafeDelete();
}
}
else
{
toDelete.UnsafeDelete();
}
return(null);
};
return(fi);
}
public Dictionary <Guid, IntegrityCheck>?FullIntegrityCheck()
{
var graph = GraphExplorer.FromRoot(this);
return(GraphExplorer.FullIntegrityCheck(graph));
}
