使用 react-mobx 重新渲染异步获取

Question

我正在尝试使用 mobx-rest with mobx-rest-axios-adapter and mobx-react，但我无法在异步数据检索时重新呈现组件。

这是我的数据模型，在 state/user.js:

import { Model } from 'mobx-rest';

class User extends Model {
  url() {
    return '/me';
  }
}

export default new User();

这是 React 组件，在 App.js:

import React from 'react';
import { inject, observer } from 'mobx-react';
import { apiClient } from 'mobx-rest';
import createAdapter from 'mobx-rest-axios-adapter';
import axios from 'axios';
import { compose, lifecycle, withProps } from 'recompose';

const accessToken = '...';
const API_URL = '...';

const App = ({ user }) => (
  <div>
    <strong>email:</strong>
    {user.has('email') && user.get('email')}
  </div>
);

const withInitialise = lifecycle({
  async componentDidMount() {
    const { user } = this.props;

    const axiosAdapter = createAdapter(axios);
    apiClient(axiosAdapter, {
      apiPath: API_URL,
      commonOptions: {
        headers: {
          Authorization: `Bearer ${accessToken}`,
        },
      },
    });

    await user.fetch();

    console.log('email', user.get('email'));
  },
});

export default compose(
  inject('user'),
  observer,
  withInitialise,
)(App);

它使用 recompose 从 componentDidMount() 中的 API 异步获取 user，一旦可用，该组件应该显示用户电子邮件。 componentDidMount() 打印可用的电子邮件。

最后是index.js:

import React from 'react';
import ReactDOM from 'react-dom';
import createBrowserHistory from 'history/createBrowserHistory';
import { Provider } from 'mobx-react';
import { RouterStore, syncHistoryWithStore } from 'mobx-react-router';
import { Router } from 'react-router';

import App from './App';
import { user } from './state/user';

const documentElement = document.getElementById('ReactApp');

if (!documentElement) {
  throw Error('React document element not found');
}

const browserHistory = createBrowserHistory();
const routingStore = new RouterStore();

const stores = { user };
const history = syncHistoryWithStore(browserHistory, routingStore);

ReactDOM.render(
  <Provider {...stores}>
    <Router history={history}>
      <App />
    </Router>
  </Provider>,
  documentElement,
);

我的问题是，一旦检索到用户并且电子邮件可用，组件就不会重新呈现，尽管控制台日志显示它在异步请求中返回正常。我试过玩弄 mobx-react 的 computed，但没有成功。有什么想法吗？

Answer 1

我认为如果您更改 App.js:

的撰写顺序，它会起作用

export default compose(
  inject('user'),
  withInitialise,
  observer,
)(App);

根据 MobX official document、

Tip: when observer needs to be combined with other decorators or higher-order-components, make sure that observer is the innermost (first applied) decorator; otherwise it might do nothing at all.

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