蚂蚁设计中的异步表单字段验证

Question

如何在蚂蚁设计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。 那么如何显示错误信息呢？

Answer 1

你在validateZipcode之前缺少await和handlezipCodeChange之前的async ：

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添加到您的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， 在同步函数中无法捕获异步操作的完整性。

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

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);
  }
});

}