使用 ElasticSearch 连接 angular 5 时出现进程未定义错误？

Question

这是我第一次使用 angular 和 elastic，我在 "this.client = new Client(//.."

行收到上述错误

确切错误

ReferenceError: process is not defined at Log.push../node_modules/elasticsearch/src/lib/log.js.Log.addOutput (log.js:213) at new Log (log.js:51) at new Transport (transport.js:19) at new EsApiClient (client.js:58) at new Client (client.js:101) at ElasticsearchService.push../src/app/elasticsearch.service.ts.ElasticsearchService.connect (elasticsearch.service.ts:23) at new ElasticsearchService (elasticsearch.service.ts:18) at _createClass (core.js:9260) at _createProviderInstance (core.js:9234) at resolveNgModuleDep (core.js:9200)

这里是相关代码

import { Client } from 'elasticsearch';
import { Injectable } from '@angular/core';

@Injectable()
export class ElasticsearchService {

  private client: Client;

  queryalldocs = {
    'query': {
      'match_all': {}
    }
  };

  constructor() {
    if (!this.client) {
      this.connect();
    }
  }

  private connect() {
    this.client = new Client({
      host: 'http://localhost:9200',
      log: 'trace'
    });
  }

Answer 1

重新安装模块解决了问题。不知道是什么首先破坏了安装。

Answer 2

我发现几个线程和下面的命令对我有用。 reference

 npm i -S process,

然后将以下 2 行添加到 polyfill.ts 文件。

 import * as process from 'process';
 window['process'] = process;

使用 ElasticSearch 连接 angular 5 时出现进程未定义错误？

Getting process not defined error when connecting angular 5 with ElasticSearch?

elasticsearch

elasticsearch-plugin

angular