reactjs - 如何为 Form.Item 验证动态设置所需的规则

Question

我有一个可以检查或不检查的参数列表。其对应字段根据复选框状态启用/禁用。因此，如果选中参数，我想启用和验证字段，并在未选中复选框时禁用字段并关闭验证规则。但是在切换复选框时我无法切换required规则。false

如您所见，该registrations参数未选中，但该字段仍有验证..

以下是我的做法：

<Row key={index} gutter={8}>
  <Col span={6} offset={4}>
    <Form.Item help="">
      <Checkbox
        checked={attribute.isActive}
        disabled={isViewMode}
        onChange={this.handleChangeAttributeActive(attribute.eventId)}
        value={attribute.name}
      >
        {attribute.name}
      </Checkbox>
    </Form.Item>
  </Col>
  <Col span={8}>
    <Form.Item help="">
      {getFieldDecorator(`${attribute.name}`, {
        initialValue: attribute.attributeSendName,
        rules: [{ required: attribute.isActive }],
      })(
        <Input
          disabled={isViewMode || !attribute.isActive}
        />
      )}
    </Form.Item>
  </Col>
</Row>

attributes是存储在组件状态中的参数数组。复选框处理程序只是切换到相反的isActive属性

你能帮忙吗？感谢

Answer 1

validateFields()接受两个参数。您应该提供{force: true}作为第二个参数来正确验证该字段。

handleChangeAttributeActive = e => {
    this.setState(
      prevState => ({
        ...prevState,
        attribute: { ...prevState.attribute, isActive: e.target.checked }
      }),
      () => {
        this.props.form.validateFields([e.target.value], { force: true });
      }
    );
  };

validateFields验证指定的字段并获取它们的值和错误。如果您不指定 fieldNames 的参数，您将验证所有字段。

import { Row, Col, Checkbox, Form, Input } from "antd";

class App extends Component {
  state = {
    attribute: {
      name: "name",
      isActive: true,
      eventId: 1,
      attributeSendName: "enter your name"
    },
    isViewMode: false
  };

  handleChangeAttributeActive = e => {
    this.setState(
      prevState => ({
        ...prevState,
        attribute: { ...prevState.attribute, isActive: e.target.checked }
      }),
      () => {
        this.props.form.validateFields([e.target.value], { force: true });
      }
    );
  };

  render() {
    const { getFieldDecorator } = this.props.form;
    const { attribute, isViewMode } = this.state;
    const index = 0;
    return (
      <div className="App">
        <Row key={index} gutter={8}>
          <Col span={6} offset={4}>
            <Form.Item help="">
              <Checkbox
                checked={attribute.isActive}
                disabled={isViewMode}
                onChange={this.handleChangeAttributeActive}
                value={attribute.name}
              >
                {attribute.name}
              </Checkbox>
            </Form.Item>
          </Col>
          <Col span={8}>
            <Form.Item help="">
              {getFieldDecorator(`${attribute.name}`, {
                message: attribute.attributeSendName,
                rules: [{ required: attribute.isActive }]
              })(<Input />)}
            </Form.Item>
          </Col>
        </Row>
      </div>
    );
  }
}

const WrappedApp = Form.create()(App);

const rootElement = document.getElementById("root");
ReactDOM.render(<WrappedApp />, rootElement);

根据您的需要更改此代码。