ReactMeteorData 类扩展值未定义不是构造函数

Question

我是 Meteor 1.7 的新手，我正在学习 simple-todos 应用程序的教程。但是在我添加了 react-meteor-data 包之后，它破坏了我的应用程序。我一直在错误之后得到东西。

/Users/userName/.meteor/packages/meteor-tool/.1.7.0_3.w8zcf.uowlh++os.osx.x86_64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.x86_64/dev_bundle/server-lib/node_modules/fibers/future.js:280
                        throw(ex);
                        ^

TypeError: Class extends value undefined is not a constructor or null
    at ReactMeteorData.jsx (packages/react-meteor-data/ReactMeteorData.jsx:162:46)
    at fileEvaluate (packages/modules-runtime.js:322:7)
    at Module.require (packages/modules-runtime.js:224:14)
    at require (packages/modules-runtime.js:244:21)
    at createContainer.jsx (packages/react-meteor-data/createContainer.jsx:1:254)
    at fileEvaluate (packages/modules-runtime.js:322:7)
    at Module.require (packages/modules-runtime.js:224:14)
    at require (packages/modules-runtime.js:244:21)
    at react-meteor-data.jsx (packages/react-meteor-data/react-meteor-data.jsx:1:139)
    at fileEvaluate (packages/modules-runtime.js:322:7)
    at Module.require (packages/modules-runtime.js:224:14)
    at require (packages/modules-runtime.js:244:21)
    at /Users/userName/Sites/drupalvm/sites/Meteor-test-app/.meteor/local/build/programs/server/packages/react-meteor-data.js:331:15
    at /Users/userName/Sites/drupalvm/sites/Meteor-test-app/.meteor/local/build/programs/server/packages/react-meteor-data.js:338:3
    at /Users/userName/Sites/drupalvm/sites/Meteor-test-app/.meteor/local/build/programs/server/boot.js:411:36
    at Array.forEach (<anonymous>)
Exited with code: 1
Your application is crashing. Waiting for file change.

如果有人能帮助我解决我做错了什么，将不胜感激。

Answer 1

通常这个错误意味着React在withTracker被导入的文件中被错误的导入。

确保导入行如下所示：

import React, { Component } from 'react';
import { withTracker } from 'meteor/react-meteor-data';