private static CreateQueryReturn ToCreateNode(NeoContext context, object entity, string queryKey, IDictionary <object, string> entities)
{
entities.Add(entity, queryKey);
var meta = context.GetMetaData(entity.GetType());
meta.GetCreatedAtProperty()?.SetValue(entity, DateTime.UtcNow);
meta.GetUpdatedAtProperty()?.SetValue(entity, DateTime.UtcNow);
var properties = BuildPropertyClause(meta, entity);
var r = new CreateQueryReturn();
r.FlattedEntities.Add(queryKey, entity);
r.Query.AppendLine($"CREATE ({queryKey}:{meta.Label} {properties})");
var rIndex = 0;
foreach (var p in meta.RelationshipProperties)
{
var rMeta = context.GetMetaData(p.EntityType);
var rEntity = p.GetValue(entity);
if (rEntity == null)
{
continue;
}
var rCollection = p.IsCollection ? (ICollection)rEntity : new[] { rEntity };
foreach (var item in rCollection)
{
if (entities.TryGetValue(item, out var existKey))
{
r.Query.AppendLine(ToRelationshipCreate(p, queryKey, existKey));
continue;
}
var rNodeKey = NodeKey.Create(rMeta.Key, rIndex++, queryKey);
r.Append(ToCreateNode(context, item, rNodeKey, entities));
r.Query.AppendLine(ToRelationshipCreate(p, queryKey, rNodeKey));
}
}
return(r);
}
internal static CreateQueryReturn ToCreate(NeoContext context, object entity)
{
var meta = context.GetMetaData(entity.GetType());
var createQuery = ToCreateNode(context, entity, NodeKey.Create(meta.Key), new Dictionary <object, string>());
createQuery.Query.Append("RETURN ");
foreach (var key in createQuery.FlattedEntities.Keys)
{
createQuery.Query.Append($"{key},");
}
createQuery.Query.TryRemoveLastCharacter(',');
return(createQuery);
}
public T Create <T>(T entity)
{
var create = CypherTranslator.ToCreate(_context, entity);
using var session = NewSession();
return(session.WriteTransaction(tx =>
{
var result = tx.Run(create.Query.ToString()).Single();
foreach (var(key, value) in result.Values)
{
var iNode = value.As <INode>();
var e = create.FlattedEntities[key];
var eMeta = _context.GetMetaData(e.GetType());
eMeta.SetId(e, iNode.Id);
}
return entity;
}));
}