我创建了一个评论表单，这将允许张贴一个视频下面的评论。 它会在重新加载页面时消失的构造函数内部抛出me id错误。 ownProps作为空对象出现，否则我会用它来获取视频ID。 我的window.location.reload（）解决方案很差劲。 有人知道更好的吗？

class Comment extends React.Component {

    constructor(props) {
        
        super(props)
        this.state = {
            body: "",
            video_id: this.props.video.id,
            comment_errors: null,
        }
        this.update = this.update.bind(this)
        this.handleSubmit = this.handleSubmit.bind(this)
    }

mport React from 'react';
import { connect } from 'react-redux';
import Comment from './comment';
import { fetchComments, updateComment, createComment } from '../../util/comment_api_util';

const mSTP = state => {
    const id = Object.keys(state.entities.videos);
    const video = state.entities.videos[id];
    
    if (video) {
        return { 
            video,
        }
    } else {
        window.location.reload()
    }
}

const mDTP = dispatch => {
    return {
        fetchComments: () => dispatch(fetchComments()),
        fetchComment: commentId => dispatch(fetchComment(commentId)),
        createComment: comment => dispatch(createComment(comment)),
        updateComment: comment => dispatch(updateComment(comment)),
        deleteComment: commentId => dispatch(deleteComment(commentId))
    }
}

export default connect(mSTP, mDTP)(Comment)