Array key control in validation rules

[eminkokdemir0]

Hi all, can we define rules according to the key of the values sent in Array type?
If there is no such feature, can you add it?
For example, it could be:

'currencies.[*]' => '...',

[navaneeth-raman-bhaskar]

Hi @eminkokdemir try this

'currencies' =>[ 'nullable', 'array', new KeyExists(Currency::class)],
'currencies.*' =>[ 'nullable', 'array' ],
'currencies.*.is_primary' => 'required_with:currencies.*|boolean'

Before that make sure to write custom rule

php artisan make:rule KeyExists

<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

class KeyExists implements Rule
{

    private string $class;
    private string $message;
    private string $column;

    public function __construct($class, $column = 'id', $message = null)
    {
        $this->class = $class;
        $this->column = $column;
        $this->setMessage($message);
    }

    /**
     * Determine if the validation rule passes.
     *
     * @param  string  $attribute
     * @param  mixed  $value
     */
    public function passes($attribute, $value): bool
    {
        $ids = array_unique(array_keys($value));
        $count = app($this->class)::whereIn($this->column, $ids)->count();
        return count($ids) === $count;
    }

    /**
     * Get the validation error message.
     *
     */
    public function message(): string
    {
        return $this->message;
    }

    public function setMessage(?string $message): self
    {
        $this->message = $message ?? 'The :attribute contains invalid values.';
        return $this;
    }
}