ant design 中的异步表单字段验证

Question

如何在ant design中异步验证表单字段？

 <FormItem>
     {getFieldDecorator('zipcode', {
       initialValue: `${customer && customer.zipcode ? customer.zipcode : ''}`,
       rules: [
         // { required: true, message: 'Please input your Zipcode' },
         { validator: this.handlezipCodeChange },
       ],
     })(
       <Input
         prefix={
           <Icon type="zipcode" style={{ color: 'rgba(0,0,0,.25)', visibility: 'hidden' }} />
         }
         type="number"
         placeholder="Zipcode"
         // onChange={this.handlezipCodeChange}
       />
     )}
</FormItem>

函数调用

  handlezipCodeChange = (rule, value, callback) => {
    if (!value) {
      callback('Please input your zipcode');
    }
    if (value.length < 5) {
      callback('Please enter minimum length of 5');
    }
    if (value.length > 5) {
      callback('Please enter maximum length of 5');
    }
    if (value.length === 5) {
      const validateZipCode = validateZipcode(value);
      if (
        validateZipCode &&
        validateZipCode.result &&
        validateZipCode.result.zipcodeInfo === null
      ) {
        callback('Seems to be Invalid Zipcode');
      } else {
        callback();
      }
    }
  };

export async function validateZipcode(zipcode) {
  return request(`/api/getZipcodeInfo?zipcode=${zipcode}`);
}

如何显示来自 api 响应的错误消息？由于 api 调用需要一些时间才能完成，此时验证函数调用在 api 请求完成之前完全执行。那么我该如何显示错误信息呢？

Answer 1

你是 missing await 之前 validateZipcode 和 async 之前 handlezipCodeChange:

handlezipCodeChange = async (rule, value, callback) => {
   ...
  if (value.length === 5) {
      const validateZipCode = await validateZipcode(value);
     ...
}

此外，如评论中所述，您需要将 await 添加到 validateZipcode 函数中：

export async function validateZipcode(zipcode) {
  return await request(`/api/getZipcodeInfo?zipcode=${zipcode}`);
}

您需要添加它，因为实际上，。

其他解决方案是从 validateZipcode 中取消标记 async，然后将其用作基于 Promise：

handlezipCodeChange = (...) => {
  ...
  if (value.length === 5) {
    const successHandler = ({result = {}}) => result.zipcodeInfo === null ? callback('Seems to be Invalid Zipcode') : callback();

    validateZipcode(value)
      .then(successHandler)
      .catch( error => callback("Can't validate zip code") );

  }
}

export function validateZipcode(zipcode) {
  return request(`/api/getZipcodeInfo?zipcode=${zipcode}`);
}

Answer 2

关于如何在按钮上应用表单验证的示例，这与提交时的表单无关。

按钮示例：

<Button
    id="schematronBtn"
    className="m-2 float-left btn-primary"
    shape="round"
    type="primary"
    onClick={() => this.showSchematronModal()}
  >
    {t('rulesForm.schematronBtn')}
</Button>

字段验证示例：

showSchematronModal() {
  this.formRef.current.validateFields().then(() => { // validation succeeded
    const { selectStatus } = this.state;
    if (selectStatus === 'DRAFT' || selectStatus === 'PILOT') {
      this.generatedRuleSchematron(true);
    } else {
      this.setState({ isSchematronModalVisible: true });
    }
  }).catch(async e => { // validation failed, call some validation function
    if (e.errorFields) { // form has errorFields
      await this.onFinishFailed(e);
    }
  });
}

ant design 中的异步表单字段验证

Async form field validation in ant design

javascript

async-await

antd

ant-design-pro