在渲染容器之前反应 redux 调度操作

Question

我对 React-redux 应用程序开发还很陌生，我想了解如何在页面加载后立即分派另一个操作。以下是我的容器代码。我正在使用这个 (https://github.com/jpsierens/webpack-react-redux) 样板文件。

let locationSearch;

const ActivationPage = ({activateUser}) => {
    return (
        <div className="container">
          <h2>Activation Required</h2>
          <p>An Activation Email was sent to your email address. Please check your inbox to find the activation link</p>
          { activateUser() }
        </div>
    );
};


ActivationPage.propTypes = {
    activateUser: PropTypes.func
};


const mapStateToProps = (state) => {
    return {
        message: state.message,
        currentUser: state.currentUser,
        request: state.request
    };
};

const mapDispatchToProps = (dispatch) => {
    return {
        activateUser: () => {
            console.log(location);
            if (location.search !== '') {
                locationSearch = querystring.parse(location.search.replace('?', ''));
                console.log(locationSearch);
                if (locationSearch.hasOwnProperty('user_id') && locationSearch.hasOwnProperty('activation_code')) {
                    // change request state to pending to show loader
                    dispatch(actions.requestActions.requestPending());

                }
            }
        }
    };
};

export default connect(
    mapStateToProps,
    mapDispatchToProps
)(ActivationPage);

此代码给我 警告：setState(...)：无法在现有状态转换期间更新 可能是因为我在渲染函数 (IDK) 期间调度了一个动作。如何转换给定代码以在页面加载后立即自动触发 activateUser() 函数。

Answer 1

https://facebook.github.io/react/docs/react-component.html

componentWillMount() 和 componentDidMount() 给你。我的意见 - 你应该避免使用 componentWillMount 而更喜欢 componentDidMount - 如果你在某个时候将使用服务器渲染

，这是有道理的

Answer 2

在我将组件转换为 class extends Component 之后它开始工作了这个答案帮助我理解了一些概念以下是为那些可能和我一样对此感到困惑的人的实施。

import React, { Component, PropTypes } from 'react';
import { connect } from 'react-redux';
import actions from '../actions';

let locationSearch;

class ActivationPage extends Component {
    constructor(props) {
        super(props);
    }

    componentDidMount() {
        this.props.activateUser();
    }

    render() {
        return (
        <div className="container">
           <h2>Activation Required</h2>
           <p>An Activation Email was sent to your email address. Please check your inbox to find the activation link</p>
        </div>
        );
    }
}

ActivationPage.propTypes = {
    activateUser: PropTypes.func
};

const mapStateToProps = (state) => {
    return {
        request: state.request
    };
};

const mapDispatchToProps = (dispatch) => {
    return {
        activateUser: () => {
            if (location.search !== '') {
                locationSearch = querystring.parse(location.search.replace('?', ''));
                if (locationSearch.hasOwnProperty('user_id') && locationSearch.hasOwnProperty('activation_code')) {
                    // change request state to pending to show loader
                    dispatch(actions.requestActions.requestPending());
                }
             }
        }
    };
};

export default connect(
    mapStateToProps,
    mapDispatchToProps
)(ActivationPage);

在渲染容器之前反应 redux 调度操作

React redux dispatch action before render container

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redux