Question

我正在尝试使用Neo4j Java Bolt驱动程序创建一个具有许多属性的节点。我的代码目前看起来像这样：

String statement =                                                        
      "   CREATE (p:Person {id: {id}, firstName: {firstName}, lastName: {lastName}, gender: {gender}, birthday: {birthday}, creationDate: {creationDate}, locationIp: {locationIp}, browserUsed: {browserUsed}, speaks: {speaks}, emails: {emails}})";
String parameters = parameters(                                           
      "id", String.valueOf(operation.personId()),                           
      "firstName", operation.personFirstName(),                             
      "lastName", operation.personLastName(),                               
      "gender", operation.gender(),                                         
      "birthday", operation.birthday().getTime(),                           
      "creationDate", operation.creationDate().getTime(),                   
      "locationIP", operation.locationIp(),                                 
      "browserUsed", operation.browserUsed(),                               
      "speaks", operation.languages(),                                      
      "emails", operation.emails());

  try (Session session = driver.session(AccessMode.WRITE)) {                 
    try (Transaction tx = session.beginTransaction()) {                     
      StatementResult result = tx.run(statement, params);                   
      tx.success();                                                         
      tx.close();                                                           
    }                                                                       
  }

但是使用HTTP和JSON，可以将语句简化为：

String statement =                                                        
      "   CREATE (p:Person {props})";

并发送一个类似于：

的JSON对象

{props: 
    {id: bla, 
     firstName: bla,
     lastName: bla,
     ...
     }
}

Neo4j Bolt驱动程序API中是否有一种方法可以使用后一版本的CREATE语句并将参数作为地图提供？

Answer 1

这与API无关。不推荐CREATE (p:Person {props})语法支持：

CREATE (p:Person) SET p = {props}

或者如果你想要添加

CREATE (p:Person) SET p += {props}

您也可以一次设置多个。

请参阅：https://neo4j.com/docs/developer-manual/current/cypher/clauses/create/#create-create-node-with-a-parameter-for-the-properties

使用螺栓驱动程序，您发送了一张地图。或Values.parameters("id", id, "firstName", firstname, ...)

Neo4j Java Bolt驱动程序：创建具有许多属性的节点

1 个答案: