无法使用Neo4j REST API动态设置节点标签

Question

Following the syntax proposed on the Neo4j REST API transactional page , I have tried running the request "CREATE (node:{group} { name: {name}}) RETURN node", { group: "Group", name: "Name"} .

The use of :{group} as a dynamic variable causes an error:

"Neo.ClientError.Statement.InvalidSyntax","message":"Invalid input '{': expected whitespace or a label name

Is this pilot error on my part, a bug in the Neo4j query parser, or a something that cannot be done?

Here's my Nodej.s code:

var request = require("request")
var host = 'localhost'
  , port = 7474
  , user = "neo4j"
  , pass = "1234"
var uri = 'http://' + user + ":" + pass + "@" + host + ':' + port + '/db/data/transaction/commit'

function runCypherQuery(query, params, callback) {
  request.post({
      uri: uri,
      json: {statements: [{statement: query, parameters: params}]}
    },
    function (err, res, body) {
      callback(err, body)
    })
}

runCypherQuery(
  "CREATE (node:{group} { name: {name}}) RETURN node"
, { group: "Group"
  , name: "Name"
  }
, function (err, resp) {
    if (err) {
      console.log(err)
    } else {
      console.log(JSON.stringify(resp))
    }
  }
)

Answer 1

Node Labels cannot be parameterized in Cypher.

Try updating the label in the query as a string instead of passing a parameter:

"CREATE (node:" + group + " {name: {name}}) RETURN node"

Answer 2

不幸的是，Cypher不支持参数化标签名称。