超級簡單或者我認爲!試圖將一個字符串傳遞給另一個組件,但它不能識別該屬性,因爲它使用了字符串插值。將變量傳遞給React組件給出「未知屬性錯誤」
編輯
我相信這可能與升級終極版,形式變化的輸入選擇。我正在使用React 15.3.1,我相信他們改變了影響Redux的輸入工作方式。 (https://github.com/erikras/redux-form/issues/1249)。
import React, { Component } from 'react';
import { connect } from 'react-redux';
import * as actions from '../../actions';
import { reduxForm } from 'redux-form';
import errorListItem from '../error-list-item/index.js';
class Signup extends Component {
handleFormSubmit(formProps) {
this.props.signupUser(formProps);
}
renderAlert() {
const errorObject = this.props.errorMessage;
// single (connection/api) error
if (errorObject === 'Network Error') {
return (
<div className="alert alert-danger">
<errorListItem message="hello" />
</div>
);
// error object from BE
} else if (errorObject && typeof errorObject === 'object') {
const keys = Object.keys(errorObject);
debugger;
if (keys.length === 0) return;
return Object.keys(errorObject).map(field => {
return errorObject[field].map(problem => {
const message = `${field} ${field}`;
return (
<ul className="error-message-list">
<errorListItem message={message} />
</ul>
);
});
});
}
}
render() {
const { handleSubmit, fields: { email, password, passwordConfirm, username }} = this.props;
return (
<div className="signup">
<form onSubmit={handleSubmit(this.handleFormSubmit.bind(this))}>
<fieldset className="form-group">
<label>Username:</label>
<input className="form-control" {...username} />
{username.touched && username.error && <div className="error">{username.error}</div>}
</fieldset>
<fieldset className="form-group">
<label>Email:</label>
<input className="form-control" {...email} />
{email.touched && email.error && <div className="error">{email.error}</div>}
</fieldset>
<fieldset className="form-group">
<label>Password:</label>
<input type="password" className="form-control" {...password} />
{password.touched && password.error && <div className="error">{password.error}</div>}
</fieldset>
<fieldset className="form-group">
<label>Confirm Password:</label>
<input className="form-control" {...passwordConfirm} />
{passwordConfirm.touched && passwordConfirm.error && <div className="error">{passwordConfirm.error}</div>}
</fieldset>
<button action="submit" className="btn btn-primary">Sign up</button>
</form>
{this.renderAlert()}
</div>
);
}
}
function validate(formProps) {
const errors = {};
if (!formProps.email) {
errors.email = 'Please enter an email';
}
if (!formProps.password) {
errors.password = 'Please enter a password';
}
if (!formProps.passwordConfirm) {
errors.passwordConfirm = 'Please enter a password confirmation';
}
if (!formProps.username) {
errors.username = 'Please enter a username';
}
// Passwords match
if (formProps.password !== formProps.passwordConfirm) {
errors.password = 'Passwords must match';
}
return errors;
}
function mapStateToProps(state) {
return { errorMessage: state.auth.errors };
}
export default reduxForm({
form: 'signup',
fields: ['email', 'password', 'passwordConfirm', 'username'],
validate
}, mapStateToProps, actions)(Signup);
兒童組件:
import React from 'react';
require('./styles.scss');
const errorListItem = ({ message }) => {
return (<li>{message}</li>)
}
export default errorListItem;
嘗試的解決方案:
跑過屬性,而無需使用可變
<ul className="error-message-list"> <errorListItem message={`${field} ${problem}`} /> </ul>
傳遞使用ES6 destructur屬性ing
<ul className="error-message-list"> <errorListItem message /> </ul>
使用舊的JS語法傳遞屬性而不用``。
const message = "" + field + " " + problem + ""; return ( <ul className="error-message-list"> <errorListItem message={message} /> </ul> );
試着讓子組件呈現任何東西!
const errorListItem = ({ message }) => { return <li>Help Me, Obi-Wan Kenobi. You're My Only Hope</li> }
文檔查閱:
https://facebook.github.io/react/warnings/unknown-prop.html
錯誤消息:
Warning: Unknown prop `message` on <errorListItem> tag. Remove this prop from the element.
預期行爲:
它應該能夠傳遞一個字符串作爲屬性。如果我使用下面,它會工作:
<ul className="error-message-list"> <errorListItem message='message' /> </ul>
如果不呈現,該錯誤信息不應該是「不明財產」,但給定的,而不是無效的屬性值。
版本:
"react": "^0.14.3",
"react-redux": "^4.0.0",
"react-router": "^2.0.1",
"redux": "^3.0.4",
"redux-form": "^5.3.1",
有趣的是,我不認爲它會因此而失敗。良好的捕獲,並按預期工作。 – user3162553
是啊...同樣在這裏。使變量名被大寫,解決了這一切。 – Domi