如何在React Admin包中显示服务器端验证发出的自定义错误消息？

Question

有什么方法可以使用https://github.com/marmelab/react-
admin
软件包执行服务器端表单验证？

这是AdminCreate组件的代码。它将创建请求发送到api。如果一切正常，Api将返回状态为422或状态码200的验证错误。

    export class AdminCreate extends Component {
  render() {
    return <Create {...this.props}>
        <SimpleForm>
          <TextInput source="name"  type="text" />
          <TextInput source="email" type="email"/>
          <TextInput source="password" type="password"/>
          <TextInput source="password_confirmation" type="password"/>
          <TextInput source="phone" type="tel"/>    
        </SimpleForm>
    </Create>;

}
}

因此，问题是，如何从服务器发送的错误对象中分别显示每个字段的错误？这是错误对象的示例：

{
errors: {name: "The name is required", email: "The email is required"},
message: "invalid data"
}

先感谢您！

class SimpleForm extends Component {
    handleSubmitWithRedirect = (redirect = this.props.redirect) =>
        this.props.handleSubmit(data => {
          dataProvider(CREATE, 'admins', { data: { ...data } }).catch(e => {
            throw new SubmissionError(e.body.errors)
          }).then(/* Here must be redirection logic i think  */);
        });

    render() {
        const {
            basePath,
            children,
            classes = {},
            className,
            invalid,
            pristine,
            record,
            resource,
            submitOnEnter,
            toolbar,
            version,
            ...rest
        } = this.props;

        return (
            <form
                className={classnames('simple-form', className)}
                {...sanitizeRestProps(rest)}
            >
                <div className={classes.form} key={version}>
                    {Children.map(children, input => (
                        <FormInput
                            basePath={basePath}
                            input={input}
                            record={record}
                            resource={resource}
                        />
                    ))}
                </div>
                {toolbar &&
                    React.cloneElement(toolbar, {
                        handleSubmitWithRedirect: this.handleSubmitWithRedirect,
                        invalid,
                        pristine,
                        submitOnEnter,
                    })}
            </form>
        );
    }
}

现在我有以下代码，它显示验证错误。但是问题是，成功后我无法执行重定向。有什么想法吗？

Answer 1

如果您使用的是SimpleForm，则可以将其asyncValidate与第97期评论中asyncBlurFields所建议的一起使用。我没有使用SimpleForm，所以这就是我能告诉你的。

我用过一个简单的form。您也可以在其中使用服务器端验证。这是我的方法。一个完整且可行的示例。

import React from 'react';
import PropTypes from 'prop-types';
import { Field, propTypes, reduxForm, SubmissionError } from 'redux-form';
import { connect } from 'react-redux';
import compose from 'recompose/compose';
import { CardActions } from 'material-ui/Card';
import Button from 'material-ui/Button';
import TextField from 'material-ui/TextField';
import { CircularProgress } from 'material-ui/Progress';
import { CREATE, translate } from 'ra-core';
import { dataProvider } from '../../providers'; // <-- Make sure to import yours!

const renderInput = ({
    meta: { touched, error } = {},
    input: { ...inputProps },
    ...props
}) => (
    <TextField
        error={!!(touched && error)}
        helperText={touched && error}
        {...inputProps}
        {...props}
        fullWidth
    />
);

/**
 * Inspired by
 * - https://redux-form.com/6.4.3/examples/submitvalidation/
 * - https://marmelab.com/react-admin/Actions.html#using-a-data-provider-instead-of-fetch
 */
const submit = data =>
    dataProvider(CREATE, 'things', { data: { ...data } }).catch(e => {
        const payLoadKeys = Object.keys(data);
        const errorKey = payLoadKeys.length === 1 ? payLoadKeys[0] : '_error';
        // Here I set the error either on the key by the name of the field
        // if there was just 1 field in the payload.
        // The `Field` with the same `name` in the `form` wil have
        // the `helperText` shown.
        // When multiple fields where present in the payload, the error  message is set on the _error key, making the general error visible.
        const errorObject = {
            [errorKey]: e.message,
        };
        throw new SubmissionError(errorObject);
    });

const MyForm = ({ isLoading, handleSubmit, error, translate }) => (
    <form onSubmit={handleSubmit(submit)}>
        <div>
            <div>
                <Field
                    name="email"
                    component={renderInput}
                    label="Email"
                    disabled={isLoading}
                />
            </div>
        </div>
        <CardActions>
            <Button
                variant="raised"
                type="submit"
                color="primary"
                disabled={isLoading}
            >
                {isLoading && <CircularProgress size={25} thickness={2} />}
                Signin
            </Button>
            {error && <strong>General error: {translate(error)}</strong>}
        </CardActions>
    </form>
);
MyForm.propTypes = {
    ...propTypes,
    classes: PropTypes.object,
    redirectTo: PropTypes.string,
};

const mapStateToProps = state => ({ isLoading: state.admin.loading > 0 });

const enhance = compose(
    translate,
    connect(mapStateToProps),
    reduxForm({
        form: 'aFormName',
        validate: (values, props) => {
            const errors = {};
            const { translate } = props;
            if (!values.email)
                errors.email = translate('ra.validation.required');
            return errors;
        },
    })
);

export default enhance(MyForm);

如果代码需要进一步说明，请在下面添加注释，我将尽力加以阐述。

我希望能够通过与调度所描述的onSuccess和onFailure处副作用的动作做的REST请求的动作在这里，但我无法得到这与共同努力SubmissionError。