来自外部交互的Redux-Form更新字段值

Question

我有一个连接到我的应用程序状态的redux表单，一切似乎都很好。我可以获取数据并将其加载到表单中，然后提交数据并获取所需的元数据…

但是，我有一个自定义交互（颜色选择器），需要动态更改托管字段的值。我尝试的所有操作都将更改屏幕，但不会更改redux表单状态，即，当我提交表单时，我只会获取原始字段数据，而不是表单中显示的新数据。

下面的版本将字段属性传递给组件，并尝试使用ColorSelect组件状态作为字段值。我也尝试过创建动作创建者，但是结果与该示例相同，并且代码更多。

注意：react@^15.4.2，react-redux@^5.0.2，redux-form@^6.4.3

...
import ColorSelect from './ColorSelect';


class CollectionForm extends Component {

    /**
     * On form submit accepted
     * @param values
     */
    onSubmit(values){

        //See screenshot for evidence
        log('Updating collection:', 'warn', values);

        //values.color is grey and not yellow!
        this.props.dispatch(updateCollection(values));
        return;
    }

    /**
     * Form render
     * @return {JSX}
     */
    render()
    {
        const { handleSubmit, submitting } = this.props;

        return (
            <form onSubmit={handleSubmit(this.onSubmit.bind(this))}>
                <Field component={renderTextInput} name="name" type="text" label="Name"/>
                <Field component={ColorSelect} name="color" />

                <div class="field-buttons right-align group">
                    <Button type="submit" disabled={submitting} primary>
                        Save
                    </Button>
                </div>
            </form>
        );
    }
};

//Redux form decorator
CollectionForm = reduxForm({ form: 'collectionForm' })(CollectionForm)

// State connector
CollectionForm = connect(
    state => ({
        initialValues: state.collections.activeCollection

    }), //MapStatetoProps
    {
        onLoad: fetchCollection
    }   //mapActionToProps
)(CollectionForm);

export default CollectionForm;

ES6：CollectionForm.js

import React, { Component } from 'react'
import { Field, reduxForm, SubmissionError } from 'redux-form';

const colors = [
    'grey', 'green', 'yellow', 'orange', 'red', 'purple', 'blue'
];

export default class ColorSelect extends Component {

    constructor(props){
        super(props);

        this.state = {
            selectedColor : this.props.input.value //Set to current <Field> input value
        };

        this.onSelect = this.onSelect.bind(this);
        this.renderColor = this.renderColor.bind(this);
    }

    /**
     * Color picker selected
     * @param color
     */
    onSelect(color){
        this.setState({ selectedColor: color }); //Sets correct state here
    }

    /**
     * Render a color list item
     * @param color
     * @return {JSX}
     */
    renderColor(color){

        const select = this.state.selectedColor === color ? "active" : "";
        const klass = color + " " + select;

        return <li key={color}>
            <a class={klass} onClick={(event) => this.onSelect(color)}></a>
        </li>
    }

    /**
     * Render color list action
     * @return {JSX}
     */
    render(){

        //Override field value with colorSelected state

        return (
            <div>
                <input {...this.props.input} value={this.state.selectedColor} name="color" type="text" label="Color" />

                <div class="color-selector">
                    <ul>
                        {colors.map((color) => this.renderColor(color) )}
                    </ul>
                </div>
            </div>
        );
    }
}

Answer 1

您可以将react-redux mapDispatchToProps与change操作创建者一起使用，以实现所需的功能：

import { Component } from "react";
import { connect } from "react-redux';
import { change } from "redux-form";

class ColorSelect extends Component {
  // ...other stuff in this class...

  renderColor (color) {
    const { selectColor } = this.props;
    return <li key={color}><a onClick={() => selectColor(color)}></a></li>;
  }
}

export default connect(null, {
  selectColor: color => change( "yourFormName", "yourFieldName", color )
})(ColorSelect)