Trait to generate Model cache keys. Applicable in Models from Laravel 5+

CacheKeys.php

<?php
/**
  * Created by: @danilopinotti
  * Inspired in Laravel Model Caching article (https://laravel-news.com/laravel-model-caching).
  */

trait CacheKeys
{
    /**
      * Generates a key that is updated each time Model is updated.
      *
      * @param string $suffix Suffix of the key
      * @return string
      */
    private function cacheKeyUpgradeable($suffix = '', int $version = 1)
    {
        if ($suffix != '') {
            $suffix = str_start($suffix, ':');
        }

        $key = sprintf(
            "%s/%s-%s%s",
            $this->getTable(),
            $this->getKey(),
            $this->updated_at->timestamp,
            $suffix
        );
     
        if ($version > 1) {
            return $key.":v$version";
        }

        return $key;
    }

     /**
      * Generates a key that is never updated.
      *
      * @param string $suffix Suffix of the key
      * @return string
      */
    private function cacheKey($suffix = '', int $version = 1)
    {
        if ($suffix != '') {
            $suffix = str_start($suffix, ':');
        }

        $key = sprintf(
            "%s/%s%s",
            $this->getTable(),
            $this->getKey(),
            $suffix
        );
     
        if ($version > 1) {
            return $key . ":v$version";
        }

        return $key;
    }
}