public override IEnumerable <CollectionItem> Load(OGM parent, Core.EntityCollectionBase target)
{
Entity targetEntity = target.ForeignEntity;
string[] nodeNames = target.Parent.GetEntity().GetDbNames("node");
string[] outNames = targetEntity.GetDbNames("out");
if (nodeNames.Length > 1 && outNames.Length > 1)
{
throw new InvalidOperationException("Both ends are virtual entities, this is too expensive to query...");
}
List <string> fullMatch = new List <string>();
for (int nodeIndex = 0; nodeIndex < nodeNames.Length; nodeIndex++)
{
for (int outIndex = 0; outIndex < outNames.Length; outIndex++)
{
string pattern = string.Empty;
if (target.Direction == DirectionEnum.In)
{
pattern = "MATCH ({0})-[rel:{2}]->({3}) WHERE node.{1} = {{key}} RETURN out, rel";
}
else if (target.Direction == DirectionEnum.Out)
{
pattern = "MATCH ({0})<-[rel:{2}]-({3}) WHERE node.{1} = {{key}} RETURN out, rel";
}
string match = string.Format(pattern,
nodeNames[nodeIndex],
target.ParentEntity.Key.Name,
target.Relationship.Neo4JRelationshipType,
outNames[outIndex]);
fullMatch.Add(match);
}
}
Dictionary <string, object?> parameters2 = new Dictionary <string, object?>();
parameters2.Add("key", parent.GetKey());
List <CollectionItem> items = new List <CollectionItem>();
var result = Transaction.RunningTransaction.Run(string.Join(" UNION ", fullMatch), parameters2);
foreach (var record in result)
{
RawNode node = record.Values["out"].As <RawNode>();
if (node is null)
{
continue;
}
OGM item = ReadNode(parent, targetEntity, node);
RawRelationship rel = record.Values["rel"].As <RawRelationship>();
DateTime?startDate = null;
DateTime?endDate = null;
if (target.Relationship.IsTimeDependent)
{
object?value;
if (rel.Properties.TryGetValue(target.Relationship.StartDate, out value))
{
startDate = Conversion <long, DateTime> .Convert((long)value);
}
if (rel.Properties.TryGetValue(target.Relationship.EndDate, out value))
{
endDate = Conversion <long, DateTime> .Convert((long)value);
}
}
items.Add(target.NewCollectionItem(parent, item, startDate, endDate));
}
return(items);
}
public override bool Equals(RawRelationship other) => other is Neo4jRawRelationship rawOther?Relationship.Equals(rawOther.Relationship) : false;
