如何从 draftjs 中检索文本

Question

我正在尝试编辑文本然后检索它并在服务器端更新数据库

这是我正在使用的代码

constructor(props,context){
    super(props,context);
    this.handleOnClick = this.handleOnClick.bind(this);

    const processedHTML = DraftPasteProcessor.processHTML(this.props.rule.description.replace(/\n/g, "<br />"));
    const contentState = ContentState.createFromBlockArray(processedHTML); 
    var editorState = EditorState.createWithContent(contentState);
    var editorState = EditorState.moveFocusToEnd(editorState);
    this.state = {editorState: editorState};
    this.onChange = (editorState) => this.setState({editorState});
}



handleOnClick(event) {
   var text = this.state.editorState.getCurrentContent().getBlocksAsArray();
   var finalText;
   text.map((item) => {
   finalText = item.getText() + finalText});
   console.log(finalText)

  render(){

    return(
    <div>
    <Col smOffset={2} mdOffset={1}>
    <PageHeader>
        {this.props.rule.title}
    </PageHeader>
    <Editor
      editorState={this.state.editorState}
      onChange={this.onChange}
    />
    </Col>

     <Col smOffset={2} mdOffset={1}>
    <Button onClick = {this.handleOnClick()}>Update rule</Button>
    </Col>
    </div>
    );

}

但是我有一个问题，draftJs returns 没有 \n 的文本所以我会保存格式错误的文本，有什么方法可以让文本带有分隔线吗？

Answer 1

您可以使用 DraftJS 的 convertToRaw 函数，如下所示获取带换行的文本：

import {
  convertToRaw,
} from 'draft-js';
const blocks = convertToRaw(editorState.getCurrentContent()).blocks;
const value = blocks.map(block => (!block.text.trim() && '\n') || block.text).join('\n');

Answer 2

检索文本的最佳方法是使用 editorState.getCurrentContent().getPlainText('\u0001')

请注意，函数 getPlainText 将始终在块之间创建单个 space，因此您需要将 \u0001 作为参数发送

Answer 3

Piyush Zalani 的回答几乎是正确的，但如果块中没有任何内容，最后的连接会导致额外的新行被追加。

这里是一个稍微修改过的版本，它正确地解释了只有换行符的块：

    const blocks = convertToRaw(editorState.getCurrentContent()).blocks;
    const mappedBlocks = blocks.map(
      block => (!block.text.trim() && "\n") || block.text
    );

    let newText = "";
    for (let i = 0; i < mappedBlocks.length; i++) {
      const block = mappedBlocks[i];

      // handle last block
      if (i === mappedBlocks.length - 1) {
        newText += block;
      } else {
        // otherwise we join with \n, except if the block is already a \n
        if (block === "\n") newText += block;
        else newText += block + "\n";
      }
    }

Answer 4

  const { blocks } = convertToRaw(editorState.getCurrentContent());
  const mappedBlocks = blocks.map(
    block => (!block.text.trim() && "\n") || block.text,
  );

  return mappedBlocks.reduce((acc, block) => {
    let returned = acc;
    if (block === "\n") returned += block;
    else returned += `${block}\n`;
    return returned;
  }, "");
};```

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