反应& Draft.js - convertFromRaw不起作用

问题描述

我正在使用Draft.js来实现文本编辑器。我想将编辑器的内容保存到数据库中，然后将其检索并再次将其注入编辑器，例如当重新访问编辑页面时。

I'm using Draft.js to implement a text editor. I want to save the content of the editor to a DB and later retrieve it and inject it in an editor again, e.g. when revisiting the editor page.

首先，这些是相关的进口

import { ContentState, EditorState, convertToRaw, convertFromRaw } from 'draft-js';

我如何将数据保存到数据库（位于父组件中）

saveBlogPostToStore(blogPost) {
    const JSBlogPost = { ...blogPost, content: convertToRaw(blogPost.content.getCurrentContent())};
    this.props.dispatch(blogActions.saveBlogPostToStore(JSBlogPost));
}

现在当我检查数据库时，我得到以下对象：

Now when I check the DB, I get the following Object:

[{"_id":null,"url":"2016-8-17-sample-title","title":"Sample Title","date":"2016-09-17T14:57:54.649Z","content":{"blocks":[{"key":"4ads4","text":"Sample Text Block","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[]}]},"author":"Lukas Gisder-Dubé","__v":0,"tags":[]}]

到目前为止我觉得很好，我尝试了其他一些东西和对象在数据库中肯定是转换的。例如，当我在不调用convertToRaw（）方法的情况下保存内容时，还有更多字段。

So far so good I guess, I tried some other stuff and the Object in the Database is definitely converted. For example, when I save the content without calling the convertToRaw()-method, there are a lot more fields.

将数据设置为新的EditorState

要从数据库中检索数据并将其设置为EditorState，我也尝试了很多。以下是我最好的猜测：

To retrieve the Data from the DB and set it as EditorState, I also tried a lot. The following is my best guess:

constructor(props) {
    super(props);
    const DBEditorState = this.props.blogPost.content;
    console.log(DBEditorState); // logs the same Object as above
    this.state = { ...this.props.blogPost, content: EditorState.createWithContent(
        convertFromRaw(DBEditorState)
    )};
}

渲染组件时出现以下错误：

When rendering the component i get the following error:

convertFromRawToDraftState.js:38 Uncaught TypeError: Cannot convert undefined or null to object

非常感谢任何帮助！

推荐答案

似乎MongoDB / Mongoose没有'喜欢ContentState的原始内容。在将数据发送到数据库之前将数据转换为字符串可以解决问题：

Seems that MongoDB/Mongoose didn't like the raw content from the ContentState. Converting the data to a String before sending it to the DB did the trick:

将ContentState保存到数据库

    saveBlogPostToStore(blogPost) {
    const JSBlogPost = { ...blogPost, content: JSON.stringify(convertToRaw(blogPost.content.getCurrentContent()))};
    this.props.dispatch(blogActions.saveBlogPostToStore(JSBlogPost));
}

使用数据库中的数据

constructor(props) {
    super(props);
    const DBEditorState = convertFromRaw(JSON.parse(this.props.blogPost.content));

    this.state = { ...this.props.blogPost, content: EditorState.createWithContent(
        DBEditorState
    )};
}

这篇关于反应& Draft.js - convertFromRaw不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！