动态地向Neo4j添加属性 [英] Add properties to Neo4j Dynamically

问题描述

如何动态地向现有节点添加新属性?在这里，我希望为我的密码查询动态分配键和值..任何建议将不胜感激:)

How to add a new property dynamically to an existing node ? Here I wan to assign both key and value dynamically to my chypher query.. Any suggestions will be highly appreciated :)

推荐答案

您可以创建包含键值对的地图，并使用SET添加这些对.

You can create a map with key value pairs and add the pairs with SET.

示例1:添加属性，将删除其他属性

Example 1: Add properties, will erase the others

WITH {name:"Kenny", age:10} as kv
MATCH (n:Person {uid:"123-fff"}) SET n = kv

示例2:追加属性，将替换现有键的值:

Example 2: Append properties, will replace values of existing keys :

WITH {name:"Kenny", age:10} as kv
MATCH (n:Person {uid:"123-fff"}) SET n += kv

理想情况下，您会将kv作为查询参数传递，因此为查询发送的json如下所示:

Ideally you would pass the kv's as query parameters, so the json sent for the query would be something like this :

{
  "statements": [
    {
      "statement": "MATCH (n:Person) SET n += {kv}",
      "params": {
        "kv": {
          "name": "kenny",
          "age": 10
        }
      }
    }
  ]
}

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