Overriding rule arguments for Required rule and AllowFalse:true

[Nataliasem]

Hi folks!
Not an issue but more like a suggestion...

Case:
When overriding the parameters for the required rule, I did not specify
allowFalse: true

 extend('required', {
    ...rules.required,
    params: ['customMessage', 'noErrorText', 'messageType']  // there should also have been 'allowFalse'
})

Because of this, the validation of "false" values in radiobuttons failed (I mean radiobutton with boolean value false)

I found the confirmation in the source code:

var validate$3 = function (value, _a) {
    var allowFalse = (_a === void 0 ? { allowFalse: true } : _a).allowFalse;  // _a.allowFalse is undefined
    var result = {
        valid: false,
        required: true
    };
    if (isNullOrUndefined(value) || isEmptyArray(value)) {
        return result;
    }
    // incase a field considers `false` as an empty value like checkboxes.
    if (value === false && !allowFalse) {
        return result;  // so validation fails
    }
    result.valid = !!String(value).trim().length;
    return result;
};

The documentation says that allowFalse has a default value of true:

https://vee-validate.logaretm.com/v3/guide/rules.html#required
The required rule allows the false value by default

But I didn't find any mentions
that if we pass our own parameters, there should also be allowFalse. Correct version:

extend('required', {
    ...rules.required,
    params: ['allowFalse', customMessage', 'noErrorText', 'messageType'] 
})

And in the component where I define the Required rule:

:rules="{ required: { allowFalse: true } }"

Maybe it's obvious, but I still think it's worth mentioning it in the documentation.
If this has already been mentioned, could you share a link, please?
Tnank you very much.

[logaretm]

The documentation only applies to rules if used as is, since you provided your own params you will overwrite the old one which removes allowFalse from the rule.

You should try to merge your params with the rules own params:

 extend('required', {
    ...rules.required,
    params: [...rules.required.params, 'customMessage', 'noErrorText', 'messageType']
})

[Nataliasem]

Thanks for the answer!