节点js + neo4j的奇异响应

Question

我试图用neo4j和nodejs做一个简单的应用程序，但我只是陷入了这个奇怪的反应中。我在neo4j上插入了一些东西，它可以工作，但是当我尝试使用密码来捕获其他节点属性时，我发现这个错误：

    Result {
      _stack: '\n    at captureStacktrace (/home/jake/node_modules/neo4j-driver/lib/v1/result.js:199:15)\n    at new Result (/home/jake/node_modules/neo4j-driver/lib/v1/result.js:65:19)\n    at Session._run (/home/jake/node_modules/neo4j-driver/lib/v1/session.js:152:14)\n    at Session.run (/home/jake/node_modules/neo4j-driver/lib/v1/session.js:130:19)\n    at /home/jake/Área de Trabalho/simples/index.js:16:31\n    at Layer.handle [as handle_request] (/home/jake/node_modules/express/lib/router/layer.js:95:5)\n    at next (/home/jake/node_modules/express/lib/router/route.js:137:13)\n    at Route.dispatch (/home/jake/node_modules/express/lib/router/route.js:112:3)\n    at Layer.handle [as handle_request] (/home/jake/node_modules/express/lib/router/layer.js:95:5)\n    at /home/jake/node_modules/express/lib/router/index.js:281:22',
  _streamObserver: 
   SessionStreamObserver {
     _fieldKeys: null,
     _fieldLookup: null,
     _queuedRecords: [],
     _tail: null,
     _error: null,
     _hasFailed: false,
     _observer: null,
     _conn: null,
     _meta: {},
     _session: 
      Session {
        _mode: 'WRITE',
        _readConnectionHolder: [Object],
        _writeConnectionHolder: [Object],
        _open: true,
        _hasTx: false,
        _lastBookmark: [Object],
        _transactionExecutor: [Object] } },
  _p: null,
  _statement: 'MATCH (p:Person) WHERE p.name =\'$name\' return p.age',
  _parameters: { name: 'Jake' },
  _metaSupplier: [Function],
  _connectionHolder: 
   ConnectionHolder {
     _mode: 'WRITE',
     _connectionProvider: 
      DirectConnectionProvider {
        _address: [Object],
        _connectionPool: [Object],
        _driverOnErrorCallback: [Function: bound _driverOnErrorCallback] },
     _referenceCount: 1,
     _connectionPromise: Promise { <pending> } } }'

错误提示符的打印

要清楚地表明:我只想找到一个节点的名称，然后显示它的年龄。我正期待着一个Json数据..

我的代码：

`const express = require ("express");
const app = express();
const bodyParser = require('body-parser');

app.use(bodyParser());

//Conec
const neo4j = require('neo4j-driver').v1;
const driver = neo4j.driver('bolt://localhost:7687', neo4j.auth.basic('neo4j', '123'));
const session = driver.session();

// Data Manipulation

app.post('/', function (req, res){
var find = req.body.pesquisa;
  const result_dois = session.run("MATCH (p:Person) WHERE p.name ='$name' return p.age", {name:find});

  console.log(result_dois);

res.end();

});

如果有人能帮忙..。

Answer 1

MATCH (p:Person) WHERE p.name ='$name' return p.age

没有必要将$name放入quotations.If中--您这样做，它不会接受参数中传递的值，相反，它将被视为值为"$name“的字符串。

经更正的查询如下：

MATCH (p:Person) WHERE p.name =$name return p.age