I have a form. where file upload is mandatory. Validation works fine first time no file uploaded, but when i upload and delete file, Form doesn't throw validation error. Here is stakbiz https://stackblitz.com/edit/react-x27nfd

CodePudding user response：

You can use getValueFromEvent prop on Form.Item component like this:

const normFile = (e) => {
  if (Array.isArray(e)) {
    return e;
  }
  return e && e.fileList;
};
...
<Form.Item
    label="File"
    name="file"
    getValueFromEvent={normFile}
    rules={[
      {
        required: true,
        message: 'Please input your File!',
      },
    ]}
  >
   ... 
</Form.Item>

Here is edited version of your stackblitz link.