Question

我正在尝试连接到PouchDB数据库，我收到了错误

Typescript Cannot use 'new' with an expression whose type lacks a call or construct signature

以下是我的代码： -

var PouchDB = require("pouchdb"); 

@Injectable()
export class PouchDBService {

  private isInstantiated: boolean;
  private database: any;

  public constructor(private http: Http) {
    if(!this.isInstantiated) {

      this.database = new PouchDB("db_name"); <--error at this line
      this.isInstantiated = true;
    }

Answer 1

在这种情况下，

@types/pouchdb可能会有所帮助。

Answer 2

您可能需要pouchdb，如下所示：

import * as PouchDB from "pouchdb";

然后可以做到：

  this.database = new PouchDB("db_name"); //should work

Typescript - 不能对类型缺少调用或构造签名的表达式使用“new”

2 个答案: