表单提交失败后显示服务器端验证错误 [英] Show server-side validation errors after failed form submit
本文介绍了表单提交失败后显示服务器端验证错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何在表单提交失败后显示验证消息?API 请求返回 HTTP 400 'application/problem+json' 响应,并包含违规列表作为字段路径.
祝你好运!
How can I show validation messages after failed form submit? API request returns HTTP 400 'application/problem+json' response and contains violations as a list with field path.
https://tools.ietf.org/html/rfc7807#section-3
{
"type": "https://example.net/validation-error",
"title": "Your request parameters didn't validate.",
"invalid-params": [
{
"name": "age",
"reason": "must be a positive integer"
},
{
"name": "color",
"reason": "must be 'green', 'red' or 'blue'"
}
]
}
解决方案
I have the solution for you, I'd recommend to do it with Saga and HttpError.
First, from our dataProvider we need to throw the HttpError
like this:
...
import {HttpError} from 'react-admin';
...
...
// Make the request with fetch/axios whatever you prefer and catch the error:
// message - the message that will appear in the alert notification popup
// status - the status code
// errors - the errors in key => value format, example in comment below
return fetchClient.request(config).then((response) => {
return convertHTTPResponse(response, type, resource, params);
}).catch(function (error) {
throw new HttpError(error.response.data.message, error.response.status, error.response.data.errors);
});
Then create saga like that:
import {CRUD_CREATE_FAILURE} from "react-admin";
import {stopSubmit} from 'redux-form';
import {put, takeEvery} from "redux-saga/effects";
export default function* errorSagas() {
yield takeEvery(CRUD_CREATE_FAILURE, crudCreateFailure);
}
export function* crudCreateFailure(action) {
var json = action.payload;
// json structure looks like this:
// {
// username: "This username is already taken",
// age: "Your age must be above 18 years old"
// }
yield put(stopSubmit('record-form', json));
}
Please make sure the errors (json) is in the format like in the example above!
Then insert the saga in the componenet:
import errorSagas from './sagas/errorSagas';
...
...
<Admin
customSagas={[ errorSagas ]}
loginPage={LoginPage}
authProvider={authProvider}
dataProvider={dataProvider}
>
Boom! it works
Good luck!
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