Laravel Rule Validations

Laravel validations

$errorMessage = "NFL Competition already exist for year $this->year and with the selected competition type.";

return [

    'name' => 'string',

    'abbreviation' => 'required|max:10',

    'year' => 'required|digits:4|integer|min:1900|max:' . (date('Y') + 1),

    'competition_type_id' => ['required', 'string', new IsCompositeUnique('basketball_competitions', ['year' => $this->year, 'competition_type_id' => $this->competition_type_id], $this->competition_id, $errorMessage)],

];

<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;
use Illuminate\Support\Facades\DB;

class IsCompositeUnique implements Rule
{
    /**
     * @var string
     */
    private $tableName;
    /**
     * @var array
     */
    private $compositeColsKeyValue = [];
    /**
     * @var mixed|null
     */
    private $rowId;

    private $errorMessage;

    /**
     * Create a new rule instance.
     *
     * @return void
     */
    public function __construct(string $tableName, array $compositeColsKeyValue, $rowId = null, $errorMessage = null)
    {
        $this->tableName = $tableName;
        $this->compositeColsKeyValue = $compositeColsKeyValue;
        $this->rowId = $rowId;
        $this->errorMessage = $errorMessage;
    }

    /**
     * Determine if the validation rule passes.
     *
     * @param string $attribute
     * @param mixed $value
     * @return bool
     */
    public function passes($attribute, $value): bool
    {
        if ($this->rowId) {
            $record = DB::table($this->tableName)->where($this->compositeColsKeyValue)->first();
            $passess = !$record || ($record && $record->id == $this->rowId);
        } else {
            $passess = !DB::table($this->tableName)->where($this->compositeColsKeyValue)->exists();
        }

        return $passess;
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message(): string
    {
        if ($this->errorMessage) {
            return $this->errorMessage;
        }
        $colNames = '';
        foreach ($this->compositeColsKeyValue as $col => $value) {
            $colNames .= $col . ', ';
        }
        $colNames = rtrim($colNames, ', ');

        return "The combination of $colNames must be unique.";
    }
}