PrestaShop商品推荐模块开发与预生产环境hook显示异常求助

Got it, let's walk through this issue step by step—since both your dev and pre-prod environments are on the same PrestaShop version and you followed identical deployment steps, the root cause is almost certainly a cache quirk, environment-specific config, or a tiny oversight that's easy to miss. Here's what to check:

1. Blast the Cache (First and Foremost) #

Pre-prod environments often have stricter caching enabled that can stick around even after module installation. Don't just rely on the backend clear cache button:

• Head to Advanced Parameters > Performance in the backend, click Clear cache (make sure to check both Smarty cache and compiled templates).
• SSH into your pre-prod server and manually delete everything in the var/cache/ directory with rm -rf var/cache/*—this ensures no leftover cached hook registrations are hiding.

2. Double-Check Your Hook Registration Code #

Even though it works in dev, it's worth verifying you don't have environment-specific logic blocking the hook:

• Open your module's main file (e.g., productrecommendationmodule.php) and look at the install() method.
• Make sure there's no conditional logic like if (_PS_MODE_DEV_) { $this->registerHook('yourCustomHook'); }—this would skip hook registration in non-dev modes like pre-prod.
• Confirm the hook name is spelled exactly the same everywhere (PrestaShop hook names are case-sensitive—displayProductRecommendation vs DisplayProductRecommendation are not the same).

3. Verify the Hook Exists in Pre-Prod #

It's possible the hook itself was accidentally removed from the pre-prod environment:

• Go to Modules > Positions and click Add new hook, then search for your hook name. If it shows up, it exists; if not, you'll need to create it (though this is unlikely if dev works, it's a quick check).
• Alternatively, run a quick DB query: SELECT * FROM ps_hook WHERE name = 'your_hook_name'; (replace ps_ with your table prefix and your_hook_name with the actual hook). If no results come back, the hook is missing and needs to be recreated.

4. Check Module Installation Status & Logs #

Sometimes module installation fails silently in pre-prod:

• Confirm your module is marked as Installed in Modules > Modules Manager. If not, reinstall it and watch for any error messages during the process.
• Check the installation logs in var/logs/install.log on the pre-prod server—look for lines related to hook registration failures (e.g., permission issues, database errors).
• Ensure the module has the necessary permissions: go to the module's configuration page and make sure there are no restrictions preventing it from using hooks.

5. Compare PHP Configs Between Environments #

Minor PHP config differences can break hook registration without obvious errors:

• Pull up phpinfo() on both dev and pre-prod (you can create a quick info.php file with <?php phpinfo(); ?> if needed).
• Check key settings like memory_limit, allow_url_fopen, and opcache.enable—if opcache is enabled in pre-prod but not dev, it might be caching old module code that doesn't include the hook registration.

6. Re-Upload & Reinstall the Module #

Sometimes file corruption happens during deployment:

• Uninstall the module in pre-prod, delete its entire directory from modules/, then re-upload the exact module files from your dev environment.
• Reinstall the module and check if the hook appears in the positions page afterward.

内容的提问来源于stack exchange，提问作者Mathieu Gelbon