C# neo4j - 不能在 MERGE 模式中使用参数映射（改用文字映射

Question

我想用参数作为对象创建节点之间的关系，如 -

               await _graphClient.ConnectAsync();
               await _graphClient.Cypher
               .Match("(obj1:Client)")
               .Where((Client obj1) => obj1.ClientId == UserId)
               .Match("(obj2:Job)")
               .Where((Job obj2) => obj2.Id == JobId) 
               .Merge("(obj1)-[r:JOB_POSTED $relationobj1]->(obj2)")
               .WithParam("relationobj1", relationobj1)
               .ExecuteWithoutResultsAsync();

以上代码给出错误 -

{"Parameter maps cannot be used in MERGE patterns (use a literal map instead, eg. "{id: {param}.id}") (line 5, column 29 (offset: 130))\n"MERGE (obj1)-[r:JOB_POSTED $relationobj1]->(obj2)"\n

如果我从关系参数中删除 $relationobj1，它会起作用。

对象关系obj1是这样生成的-

JOBS_POSTED relationobj1 = new JOBS_POSTED();
relationobj1.createddate = DateTime.UtcNow;

知道将参数作为对象传递的正确方法是什么吗？

提前致谢

Answer 1

请尝试使用 set。性能方面 - 没有区别。

await _graphClient.ConnectAsync();
await _graphClient.Cypher
    .Match("(obj1:Client)")
    .Where((Client obj1) => obj1.ClientId == UserId)
    .Match("(obj2:Job)")
    .Where((Job obj2) => obj2.Id == JobId) 
    .Merge("(obj1)-[r:JOB_POSTED]->(obj2)")
    .Set("r = $relationobj1") //HERE
    .WithParam("relationobj1", relationobj1)
    .ExecuteWithoutResultsAsync();

C# neo4j - 不能在 MERGE 模式中使用参数映射（改用文字映射

C# neo4j - Parameter maps cannot be used in MERGE patterns (use a literal map instead

c#

neo4j

neo4jclient