Question

我正在使用c＃构建app以测试nosql数据库的性能。我正在尝试向模型插入大量集合，并创建关系，如第一个集合中的一个对象和第二个集合中的一个对象。

这些是我的模特：

public class Movie
{
    public Guid Id { get; set; }
    public string Title { get; set; }
    public string Description { get; set; }
    public int Year { get; set; }
    public string Genres { get; set; }
    public int Rating { get; set; }
    public string OriginalLanguage { get; set; }
    public string ProductionCountry { get; set; }
    public int VotingsNumber { get; set; }
}
public class Actor
{
    public string Firstname { get; set; }
    public string Lastname { get; set; }
    public int Age { get; set; }
}

我正在尝试使用此代码执行此操作：

    var moviesCollection = Movie.CreateMoviesCollectionForNeo4j(collectionEntriesNumber);
    var actorsCollection = Movie.CreateActors(collectionEntriesNumber);

    for (int j = 0; j < collectionEntriesNumber; j++)
    {
        _client.Cypher.Create("(movie:Movie {newMovie})").WithParam("newMovie", moviesCollection[j]).ExecuteWithoutResults();
        _client.Cypher.Create("(actor:Actor {newActor})").WithParam("newActor", actorsCollection[j]).ExecuteWithoutResults();
        _client.Cypher.Match("(movie:Movie)","(actor:Actor)").Where((Movie movie) => movie.Id == moviesCollection[j].Id).AndWhere((Actor actor) => actor.Firstname == actorsCollection[j].Firstname).CreateUnique("actor-[:STARTED_IN]->movie").ExecuteWithoutResults();

    }

但我得到例外： Unhandled node type MemberAccess in MemberExpression: value(NoSQLTesting.DatabaseHandlers.Neo4j+<>c__DisplayClass0).moviesCollection.get_Item(value(NoSQLTesting.DatabaseHandlers.Neo4j+<>c__DisplayClass2).j).Id

有人可以解释我的错误以及如何做对吗？谢谢， P上。

Answer 1

根据this similar question的答案，以下代码可能对您更有效（并且可能更高效）：

var moviesCollection = Movie.CreateMoviesCollectionForNeo4j(collectionEntriesNumber);
var actorsCollection = Movie.CreateActors(collectionEntriesNumber);

for (int j = 0; j < collectionEntriesNumber; j++)
{
    var currMovie = moviesCollection[j];
    var currActor = actorsCollection[j];
    _client.Cypher.Create("(movie:Movie {newMovie})").WithParam("newMovie", currMovie).ExecuteWithoutResults();
    _client.Cypher.Create("(actor:Actor {newActor})").WithParam("newActor", currActor).ExecuteWithoutResults();
    _client.Cypher.Match("(movie:Movie)","(actor:Actor)").Where((Movie movie) => movie.Id == currMovie.Id).AndWhere((Actor actor) => actor.Firstname == currActor.Firstname).CreateUnique("actor-[:STARTED_IN]->movie").ExecuteWithoutResults();

}

使用c＃在Neo4j数据库中插入2个具有关系的大型集合

1 个答案: