Question

我正在尝试传递values和props，该formik需要1个组件。我将各种小组件用于某些形式，并将它们传递到一个复杂的组件中，该组件需要在调用时传递给每个单独的渲染器。

基本上所有FormikProps。这是一个这样的组件。

import React, { Fragment } from 'react';
import debounce from 'debounce-promise';
import classNames from 'classnames';
import { Field, FormikProps, ErrorMessage } from 'formik';

import Asterisk from 'shared/common/components/element/Asterisk';
import { validateUsername } from '../../utils/index';

interface IValues {
  username?: string;
  email?: string;
}

export const InfoFields = (props: FormikProps<IValues>): JSX.Element => {
  const debounceUsernameValidation = (): void => {
    debounce(validateUsername, 500);
  };

  const { touched, errors } = props;

  return (
    <Fragment>
      <div className="pb-2">
        <label className="font-weight-bold" htmlFor="username">
          Username <Asterisk />
        </label>
        <Field
          validate={debounceUsernameValidation}
          className={classNames('form-control', {
            'is-invalid': errors.username && touched.username
          })}
          placeholder="Username (Required)"
          autoComplete="username"
          name="username"
          type="text"
        />
        <ErrorMessage name="username" component="div" className="text-danger" />
      </div>
      <div className="py-2">
        <label className="font-weight-bold">Email</label>
        <Field
          className={classNames('form-control', {
            'is-invalid': errors.email && touched.email
          })}
          autoComplete="email"
          placeholder="Email"
          name="email"
          type="email"
        />
        <ErrorMessage name="email" component="div" className="text-danger" />
      </div>
    </Fragment>
  );
};

export default InfoFields;

在这里，我在复杂的组件内部调用它：



  render(): ReactNode {
    const { mode } = this.props;
    return (
      <Formik
        initialValues={this.getInitialValues()}
        validationSchema={this.getValidationSchemas()}
        onSubmit={this.handleSubmit}
        validateOnBlur={false}
        render={({ status, isSubmitting }) =>
          (
            <Form>
              {status && (
                <div className="mb-3 text-danger" data-test="user-form-error-message">
                  {status}
                </div>
              )}
              {mode === ActionMode.ADD_USER && (
                <Fragment>
                  <InfoFields /> // This is the component from above
                </Fragment>
              )}
              <Button
                className="btn btn-primary w-100 mt-5"
                disabled={isSubmitting}
                loading={isSubmitting}
                type="submit"
              >
                {mode === ActionMode.ADD_USER && <span>CREATE USER</span>}
              </Button>
            </Form>
          ) as ReactNode
        }
      />
    );
  }

现在，当我在另一个组件中调用该组件时，会出现此错误：

Uncaught TypeError: Cannot read property 'username' of undefined. It refers to this line of code:
errors.username && touched.username and this
errors.email && touched.email

interface IProps {
  doSubmit(service: object, values: object): LensesHttpResponse<string>;
  onSave(values: { username?: string; email?: string; password?: string; group?: string }): void;
  notify(config: object): void;
  mode: ActionMode;
  user: IUser;
}

interface IValues extends FormikValues {
  username?: string;
  email?: string;
  password?: string;
  group?: string;
}

我需要一种将道具username, email和其他道具传递给每个单独组件的方法。问题在于该组件被称为2渲染，因此它无法访问

我在这里很茫然。有人能帮我吗？谢谢！

Answer 1

尽管您已经编写了接受Category1, Category2的组件，但实际上并没有将道具传递给InfoFields。您可以像这样传递Formik的道具：

FormikProps<IValues>

或者（根据我的个人喜好），删除<Formik render={formikProps => ( <Form> // Other Code. <InfoFields {...formikProps} /> // Other Code. </Form> )} />的道具并将InfoField用作渲染道具，例如：

Field

使用字段渲染道具，您可以访问嵌套在更下方的组件中的表单值，而无需在整个地方传递道具。

反应|如何将FormikProps传递给一个组件

1 个答案: