Laravel 5.5 Conditionally adding validation rule

Question

I have data coming in through an AJAX post like this:

data:
     0: {type: 'percent', amount: 10,…}
     1: {type: 'percent', amount: 200,…}

As you can see, the last item in the array is a problem. If the type is percent, and the amount is more than 100, the validation should fail.

I'm using the following function to validate the request:

public function validateRequest( $request ) {
    $rules = [
        'data.*.type'   => 'required|alpha',
        'data.*.amount' => 'required|min:1|int',
    ]
    $messages = [...];
    Validator::make($request->all(), $rules, $messages)->validate();
}

I've been looking on the Validation page, and I think I need to conditionally add the max:100 rule to that specific array index but only if that specific array index' type is percent. I'm just not sure how to get that done.

Thank you in advance!

Check out this answer using 'withValidator'; stackoverflow.com/a/68562849/2867894 — omarjebari
– omarjebari, Commented Oct 20, 2021 at 12:46

Marcin Nabiałek · Accepted Answer · 2017-10-04 14:47:04Z

5

I usually do such things as simple like this:

$rules = [
    'data.*.type'   => 'required|alpha',
    'data.*.amount' => ['required', 'min:1', 'int'],
];

foreach ($request->input('data') as $key => $value)
{
   if (array_get($value, 'type') == 'percent') {
      $rules["data.{$key}.amount"][] = 'max:100';
   }
}

Notice the array syntax for rules instead of pipe to make it easier to add additional rules.

answered Oct 4, 2017 at 14:47

Marcin Nabiałek

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1 Comment

Brandon Oldenhof Over a year ago

Thank you very much! This seems to do exactly as I wanted :)

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