Redux Form - Field Normalizing Example

README.md

Redux Form - Field Normalizing Example

The original example: Redux Form - Field Normalizing Example

App.js

import React from 'react';
import FieldNormalizingForm from './FieldNormalizingForm';
import { createStore } from 'redux';
import { Provider } from 'react-redux';
import reducer from './reducer';
import "bootstrap/dist/css/bootstrap.css";

const store = createStore(reducer);

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = {debug: ''};
  }

  handleSubmit(values) {
    const self = this;
    self.setState({debug: JSON.stringify(values)});
  }

  render() {
    const onSubmit = this.handleSubmit.bind(this);
    return (
      <Provider store={store}>
        <div>
          <FieldNormalizingForm onSubmit={onSubmit} />
          <div>
            <pre>{this.state.debug}</pre>
          </div>
        </div>
      </Provider>
    );
  }
}

export default App;

cra-script.sh

#!/bin/bash

NAME=redux-form-normalizing

echo -n "This script runs create-react-app $NAME. Proceed? (Y/N) "
read YN
if [ x$YN != xY ]
then
  echo "Bye."
  exit
fi

# Delete this line only if you are sure what is done from this line on.
exit

create-react-app $NAME
cd $NAME
cp -v ../package.json .
cd src
rm -f App.* logo.svg
cp -v ../../*.js .
cd ..
yarn install

echo 'To launch the dev server, run `yarn run start`.'

FieldNormalizingForm.js

import React from 'react'
import { Field, reduxForm } from 'redux-form'
import normalizePhone from './normalizePhone'
import {
  Form, FormGroup,
  Row, Col,
  Button
} from 'react-bootstrap'

const upper = value => value && value.toUpperCase()
const lower = value => value && value.toLowerCase()
const lessThan = otherField => (value, previousValue, allValues) =>
  parseFloat(value) < parseFloat(allValues[otherField]) ? value : previousValue
const greaterThan = otherField => (value, previousValue, allValues) =>
  parseFloat(value) > parseFloat(allValues[otherField]) ? value : previousValue

const FieldNormalizingForm = props => {
  const { handleSubmit, pristine, reset, submitting } = props
  return (
    <Form onSubmit={handleSubmit}>
      <FormGroup>
        <Row>
          <Col sm={2}>
            <label>Username</label>
          </Col>
          <Col sm={8}>
            <Field
              name="username"
              component="input"
              type="text"
              placeholder="Username"
              normalize={lower}
            />
          </Col>
        </Row>
      </FormGroup>
      <FormGroup>
        <Row>
          <Col sm={2}>
            <label>Shout</label>
          </Col>
          <Col sm={8}>
            <Field
              name="shout"
              component="input"
              type="text"
              placeholder="Shout something!"
              normalize={upper}
            />
          </Col>
        </Row>
      </FormGroup>
      <FormGroup>
        <Row>
          <Col sm={2}>
            <label>Phone</label>
          </Col>
          <Col sm={8}>
            <Field
              name="phone"
              component="input"
              type="text"
              placeholder="Phone Number"
              normalize={normalizePhone}
            />
          </Col>
        </Row>
      </FormGroup>
      <FormGroup>
        <Row>
          <Col sm={2}>
            <label>Min</label>
          </Col>
          <Col sm={8}>
            <Field
              name="min"
              component="input"
              type="number"
              normalize={lessThan('max')}
            />
          </Col>
        </Row>
      </FormGroup>
      <FormGroup>
        <Row>
          <Col sm={2}>
            <label>Max</label>
          </Col>
          <Col sm={8}>
            <Field
              name="max"
              component="input"
              type="number"
              normalize={greaterThan('min')}
            />
          </Col>
        </Row>
      </FormGroup>
      <Button type="submit" bsStyle="primary"
        disabled={submitting}>
        Submit
      </Button>
      <Button type="button" bsStyle="default"
        disabled={pristine || submitting} onClick={reset}>
        Clear Values
      </Button>
    </Form>
  )
}

export default reduxForm({
  form: 'normalizing', // a unique identifier for this form
  initialValues: { min: '1', max: '10' }
})(FieldNormalizingForm)

normalizePhone.js

const normalizePhone = value => {
  if (!value) {
    return value
  }

  const onlyNums = value.replace(/[^\d]/g, '')
  if (onlyNums.length <= 3) {
    return onlyNums
  }
  if (onlyNums.length <= 7) {
    return `${onlyNums.slice(0, 3)}-${onlyNums.slice(3)}`
  }
  return `${onlyNums.slice(0, 3)}-${onlyNums.slice(3, 6)}-${onlyNums.slice(
    6,
    10
  )}`
}

export default normalizePhone

package.json

{
  "name": "redux-form-selecting-form-values",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "bootstrap": "^3.3.7",
    "react": "^16.0.0",
    "react-bootstrap": "^0.31.5",
    "react-dom": "^16.0.0",
    "react-redux": "^5.0.6",
    "redux": "^3.7.2",
    "redux-form": "^7.1.2"
  },
  "devDependencies": {
    "react-scripts": "1.0.14"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject"
  }
}

reducer.js

import { combineReducers } from 'redux';
import { reducer as formReducer } from 'redux-form';

const rootReducer = combineReducers({
  form: formReducer
});

export default rootReducer;

submit.js

import { SubmissionError } from 'redux-form'

const sleep = ms => new Promise(resolve => setTimeout(resolve, ms))

function submit(values) {
  return sleep(1000).then(() => {
    // simulate server latency
    if (!['john', 'paul', 'george', 'ringo'].includes(values.username)) {
      throw new SubmissionError({
        username: 'User does not exist',
        _error: 'Login failed!'
      })
    } else if (values.password !== 'redux-form') {
      throw new SubmissionError({
        password: 'Wrong password',
        _error: 'Login failed!'
      })
    } else {
      return values;
    }
  })
}

export default submit