使用 neo4j 客户端构建动态查询 [英] Build a dynamic query using neo4j client

问题描述

我阅读了很多关于这个主题的问题，并创建了以下几乎动态的查询:

I read many questions on this topic and created the following almost dynamic query:

var resQuery = WebApiConfig.GraphClient.Cypher
                .Match("(movie:Movie {title:{title}})")
                .WithParam("title", title)
                .Return(() => new {
                    movie = Return.As<string>("movie.title")
                }).Results;

不幸的是，这不是动态的，因为我在 Return 匿名类型中声明了 movie 属性.

Unfortunately this isn't dynamic since I'm declaring the movie property in the Return anonymous type.

在我发现的所有示例中，唯一的选择是将节点作为与节点属性匹配的对象返回，如:movie = Return.As("movie.title")

In all the examples I found the only option is to return the nodes as an object matches the node properties, like: movie = Return.As<string>("movie.title")

我希望 Return 语句返回所有节点属性的键值对列表(它可以是任何表示形式，如 JSON 等)，因为我的节点是通用的，而不是每次都来自特定的对象类型.

I want the Return statement to give me back a key-value pair list of all the node properties (it can be in any representation like JSON etc..), since my nodes are generic and not from a specific object kind every time.

这可能吗?

推荐答案

你可以这样做:

var resQuery = WebApiConfig.GraphClient.Cypher
    .Match("(movie:Movie {title:{title}})")
    .WithParam("title", title)
    .Return(() => Return.As<Node<Dictionary<string,string>>>("movie"));

var results = resQuery.Results.Select(r => r.Data);
Console.WriteLine(results.First()["title"]);

或者，例如:

var resQuery = WebApiConfig.GraphClient.Cypher
    .Match("(movie:Movie {title:{title}})")
    .WithParam("title", title)
    .Return(() => Return.As<Node<string>>("movie"));

var results = resQuery.Results;
List<dynamic> nodes = results.Select(r => JsonConvert.DeserializeObject<dynamic>(r.Data)).ToList();
Console.WriteLine(nodes[0].title);

这篇关于使用 neo4j 客户端构建动态查询的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！