Question

我在使用redux-form时遇到了麻烦。我正在标准的CRUD应用程序中创建一个更新/编辑页面，我似乎无法获取表单来获取其初始值。这是我的代码：

import React, { Component } from 'react';
import { Field, reduxForm } from 'redux-form';
import { Link, withRouter } from 'react-router-dom';
import { connect } from 'react-redux';
import { updateArtwork, fetchPiece } from '../actions';

class UpdateArtwork extends Component {
  componentDidMount() {
    const { id } = this.props.match.params;

    this.props.fetchPiece(id);
  }

  renderField(field) { 
    return (
      <div className="input-field">
        <input
          placeholder={field.label}
          type="text"
          {...field.input}
        />
      </div>
    );
  }

  onSubmit(values) {
    const { updateArtwork, history } = this.props;
    const { id } = this.props.match.params;

    updateArtwork(id, values, history);
  }

  render() {
    const { handleSubmit, piece } = this.props;

    return (
      <div className="card-panel">
        <h4>Edit this piece.</h4>
        <form onSubmit={handleSubmit(this.onSubmit.bind(this))}>
          <Field
            label="Artwork URL"
            name="image"
            component={this.renderField}
          />
          <Field
            label="Artist"
            name="artist"
            component={this.renderField}
          />
          <Field
            label="Class"
            name="teacher"
            component={this.renderField}
          />
          <Field
            label="Grade"
            name="level"
            component={this.renderField}
          />
          <Field
            label="Description"
            name="description"
            component={this.renderField}
          />
          <button 
            type="submit" 
            className="waves-light waves-effect btn"
          >
            Submit
          </button>
          <Link 
            to={`/artwork/show/${piece._id}`}
            style={{ margin: '0 5px' }} 
            className="waves-light waves-effect btn"
          >
            Cancel
          </Link>
        </form>
      </div>
    );
  }
}

const mapStateToProps = ({ artwork }, ownProps) => {
  return { 
    piece: artwork[ownProps.match.params._id], 
    initialValues: artwork[ownProps.match.params._id]
  };
};

export default reduxForm({
  form: 'UpdateArtworkForm',
  enableReinitialize: true
})(
  connect(mapStateToProps, { updateArtwork, fetchPiece })(withRouter(UpdateArtwork))
);

我在网上搜索中发现的最常见问题是我的mapStateToProps函数中包含initialValues prop，并在我的reduxForm配置中包含“enableReinitialize：true”。我已经做了这两件事，但我仍然没有。

作为旁注，此组件中的其他所有内容都有效。该片段使用更新的输入中的任何内容正确更新，并且我的fetchPiece（）操作正确地获取该片段与在显示页面中完全相同。所有正确的信息都位于我的网络选项卡中的对象中。我似乎无法将其加载到表单中。

我在这里缺少什么？

编辑：artwork [ownProps.match.params._id]返回以下内容：

{_id: "5a15ecb8d6cfbe0c4e68b3be", artist: "Ceanne", teacher: "Royals", level: "14", description: "Derek and Ceanne at the Royals game.", …}
artist: "Ceanne"
comments: (3) [{…}, {…}, {…}]
created: "2017-11-22T21:31:36.849Z"
description: "Derek and Ceanne at the Royals game."
image: "https://res.cloudinary.com/drkgrntt/image/upload/v1511386296/raixtyabfjrosvnnfavs.jpg"
level: "14"
teacher: "Royals"
__v: 8
_id: "5a15ecb8d6cfbe0c4e68b3be"
__proto__: Object

Answer 1

从我提到的here方式可以看出的差异是，在将组件连接到redux存储之后，reduxForm HOC被包装。然而，在该示例中反之亦然。你能按照下面的代码进行出口吗？

UpdateArtworkForm = reduxForm({
  form: 'UpdateArtworkForm',
  enableReinitialize: true
})(UpdateArtwork)

export default connect(
  ({ artwork }, ownProps) => {
    return { 
      piece: artwork[ownProps.match.params._id], 
      initialValues: artwork[ownProps.match.params._id]
    };
  },
  { updateArtwork, fetchPiece }
)(withRouter(UpdateArtworkForm))

我建议的另一种方法是，在父组件中，呈现UpdateArtworkForm，尝试connect与商店，获取道具并将其作为initialValues传递给redux-form

假设您有一个组件Create，您在其中呈现UpdateArtworkForm，它可以作为

传递

class Create extends React.Component {
  render() {
    return <UpdateArtworkForm initialValues={artwork[ownProps.match.params._id]}
  }
}

redux-form initialValues不起作用

1 个答案: