How to set the correct validator for a simple radio button in yii?

Question

Yii

Good day!
I have a form from CFormModel . There are many fields in the form, and all of them are validated except for the sex (gender) field of type radio .
There are only 2 radio buttons - male , female .
For sex, the rules are:

public function rules()
{
  return array(
    array(' ... , sex'=>'required'),
                array('sex', 'length', 'max'=>6),
        );
}

In the form I display the radio buttons in this way:

php echo $form->radioButtonList($qForm,'sex',array(
    'male'=>'male',
    'female'=>'female'
));

For some reason, when I click on submit, an error appears on the form: It is
necessary to fill in the "Gender" field.
Even though I selected the radio button as if I hadn't clicked anywhere, what could be the problem?

Answer 1

Look at the html form. Can compare with those that work. maybe the name is wrong. Check what the form submits to see if there is any value there.