Question

我有一个查询，我只想回收ID和名称，以减少网络流量。我可以通过查询的以下部分从数据库中获得我想要的东西

ShipToCities = Return.As<IEnumerable<string>>("COLLECT( [shipTo.InternalId, shipTo.Name])")

但问题是我收回这样的数据：

[ [ "IN.KA.MANG", "Mangalore" ], [ "IN.KA.MANG", "Mangalore" ], [ "IN.KA.BANG", "Bangalore" ] ]

但我怎样才能将它映射到C＃对象，如

public class CityFound
{
    public string CityId { get; set; }
    public string CityName { get; set; }
}

有没有办法使用一些转换器实现这一点，而我自己不必使用一些丑陋的字符串操作？

更新1：

实际上我的查询相当复杂，只有获取我能想到的数据的方法是手工编写下面的查询以减少：

//selectedLoadQuery below is a complex query based on user selection...

var query = selectedLoadQuery
    .Match("(load)-[:SHIPPED_BY]->(shipper)-[r:HAS_TRANSPORTER]->(transporter)")
    .With("load, transporter, shipper, user, count(DISTINCT r) as MyClients")
    .Match("p=(shipFrom:City)<-[:SHIP_FROM_CITY]-(load)-[:SHIP_TO_CITY]->(shipTo:City)")
    .With("p, load,  shipFrom, shipTo, transporter, MyClients")
    .Return((load, shipFrom, shipTo) => new
    {
        TotalShipments = load.CountDistinct(),
        FromMyClients = Return.As<long>("MyClients"),
        ShipFromCities = Return.As<IEnumerable<string>>("COLLECT( [shipFrom.InternalId, shipFrom.Name])"),
        ShipToCities = Return.As<IEnumerable<string>>("COLLECT( [shipTo.InternalId, shipTo.Name])"),
     });

此致基兰

Answer 1

你不需要那么有创意。您只是遇到了这个问题，因为您正在手工制作这样一个复杂的查询，以平衡数据的结构。

创建一个描述节点内容的类：

public class ShippingDestination
{
    public long InternalId { get; set; }
    public string Name { get; set; }
}

使用此选项可在Return语句中点亮以下语法：

var cities = graphClient
    .Match(...)
    .Return(shipTo => new {
        Id = shipTo.As<ShippingDestination>().InternalId,
        Name = shipTo.As<ShippingDestination>().Name,
    })
    .Results;

Neo4jClient：如何将收集结果反序列化为c＃类

1 个答案: