Laravel check validation based on another fields - laravel

Question

I want to make start_po_no validation(required_if and digits_between) when po_type value is 1 and use_spo field value is 1.
Now, I'm written validation rule in request file like following:
public function rules()
{
return [
'use_spo' => 'required',
'po_type' => 'required',
'start_po_no' => Rule::requiredIf(function () use ($supplierPoUse, $generatePo) {
return request("use_spo") == 1 && request("po_type") == 1;
}).'|digits_between:1,9',
];
}
But, this code only correct for required_if, but digits_between is still not working. I read laravel validation documentation but I'm not user how to check it correctly.
#Edit
But, digits_between validation still checking even use_spo or po_type is not 1. I want also digits_between validation when use_spo and po_type is equal to 1.

Answer 1

Based on the explanation, I believe you can just add the rules conditionally. No reason to make it more complicated.
public function rules()
{
$rules = [
'use_spo' => 'required',
'po_type' => 'required',
];
if (request("use_spo") == 1 && request("po_type") == 1) {
$rules['start_po_no'] = 'required|digits_between:1,9';
}
return $rules;
}

Answer 2

I have two ways of doing it
Using Closures
return [
'use_spo' => 'required',
'po_type' => 'required',
'start_po_no' => [
Rule::requiredIf(function () use ($supplierPoUse, $generatePo) {
return request("use_spo") == 1 && request("po_type") == 1;
}),
function ($attribute, $value, $fail) {
if (request("use_spo") == 1 && request("po_type") == 1) {
if(!(1 <= $value && $value <= 9))
$fail('The '.$attribute.' is invalid.');
}
}
]
];
Using add()
Don't use digits between just after but do it after validation rules are run.
you can add your validation after initial validation.
$validator = Validator::make(...);
$validator->after(function ($validator) {
if (request("use_spo") == 1 && request("po_type") == 1) {
if(!(1 <= $value && $value <= 9))
$validator->errors()->add(
'start_po_no', 'invalid start po no'
);
}
});
if ($validator->fails()) {
// throw your validation exception
}