public static void AddRelation(this BasePenguin self, PenguinRelationshipDirection direction, string relationName, List <long> id)
{
id.ForEach(i =>
{
var basePenguinRelationship = new BasePenguinRelationship(direction, new RelationDatastore(relationName), i);
self.DirtyDatastore.Relations.CreateOrAddToList(relationName, basePenguinRelationship);
});
}
private static object ConvertToNeo4jRelationObj(long penguinId, BasePenguinRelationship relation)
{
if (relation.Direction == PenguinRelationshipDirection.OUT)
{
return new { name = relation.RelationName, from = penguinId, to = relation.Target.ID.Value, param = RelationDatastore.Combine(relation.Datastore, relation.DirtyDatastore).Attributes }
}
;
else
{
return new { name = relation.RelationName, from = relation.Target.ID.Value, to = penguinId, param = RelationDatastore.Combine(relation.Datastore, relation.DirtyDatastore).Attributes }
};
}
public static List <BasePenguin> GetPenguinById(ISession session, List <long> ids)
{
var objResult = session.Run("MATCH (obj) WHERE ID(obj) IN $ids RETURN obj", new { ids });
var relationsResult = session.Run(
"MATCH (relatedObj)-[relation]->(obj) WHERE id(obj) IN $ids RETURN id(obj) as id, 'IN' AS direction, relatedObj, relation " +
"UNION MATCH (obj)-[relation]->(relatedObj) WHERE id(obj) IN $ids RETURN id(obj) as id, 'OUT' AS direction, relatedObj, relation", new { ids });
var objs = objResult.Select(i => i["obj"].As <INode>()).ToList();
if (objs.Count != ids.Count)
{
throw new PersistenceException("Key not Exist:" + string.Join(",", ids.Except(objs.ConvertAll(i => i.Id))));
}
var datastoreDic = new Dictionary <long, Datastore>();
objs.ForEach(i =>
{
var ds = new Datastore(i.Labels.First())
{
Attributes = i.Properties.ToDictionary()
};
datastoreDic.Add(i.Id, ds);
});
foreach (var relationRecord in relationsResult)
{
long id = relationRecord["id"].As <long>();
var relationInfo = relationRecord["relation"].As <IRelationship>();
var relationDatastore = new RelationDatastore(relationInfo.Type)
{
Attributes = relationInfo.Properties.ToDictionary()
};
var direction = relationRecord["direction"].As <string>() == "IN" ? PenguinRelationshipDirection.IN : PenguinRelationshipDirection.OUT;
var relation = new BasePenguinRelationship(direction, relationDatastore, direction == PenguinRelationshipDirection.IN ? relationInfo.StartNodeId : relationInfo.EndNodeId);
datastoreDic[id].Relations.CreateOrAddToList(relationInfo.Type, relation);
}
var resultPenguins = datastoreDic.ToList().Select(i => new BasePenguin(i.Key, i.Value)).ToList();
return(resultPenguins);
}
