php - CakePHP: upgrade from 3.6.x to 4.0 "Missing Template Exception"

Question

I followed the upgrade guide (after I upgraded from 3.6 to 3.8) but I get this error:

Error: [CakeViewExceptionMissingTemplateException] Template file "Errorerror500.ctp" is missing

....

If you want to customize this error message, create srcTemplateErrorfatal_error.ctp

After the upgrade procedure my templates moved to app_nameemplates directory and renamed to *.php instead of *.ctp . I updated the app.php and app.default.php with the new paths:

'App' => [
        'namespace' => 'App',
        'encoding' => env('APP_ENCODING', 'UTF-8'),
        'defaultLocale' => env('APP_DEFAULT_LOCALE', 'en_US'),
        'defaultTimezone' => env('APP_DEFAULT_TIMEZONE', 'UTC'),
        'base' => false,
        'dir' => 'src',
        'webroot' => 'webroot',
        'wwwRoot' => WWW_ROOT,
        //'baseUrl' => env('SCRIPT_NAME'),
        'fullBaseUrl' => false,
        'imageBaseUrl' => 'img/',
        'cssBaseUrl' => 'css/',
        'jsBaseUrl' => 'js/',
        'paths' => [
            'plugins' => [ROOT . DS . 'plugins' . DS],
            'templates' => [ROOT . DS . 'templates' . DS],
            'locales' => [ROOT . DS  . 'Locale' . DS],
        ],
    ],

But still the application is looking for the template files with .ctp extension and under srcTemplate...

What am I missing?

Answer 1

From my experience:

Upgrade CakePHP 3.x to 4.x

• composer update
• run phpstan from --level 0 to 2 and fix your code or test in scrutinizer
• read 4.0 Migration Guide : https://book.cakephp.org/4/en/appendices/4-0-migration-guide.html
• read 4.0 Upgrade Guide : https://book.cakephp.org/4/en/appendices/4-0-upgrade-guide.html Steps:
• Install the upgrade tool
• Rename locale files
• Rename template files
• Once you've renamed your template and locale files, make sure you update App.paths.locales and App.paths.templates paths to be correct.
• From your app composer file remove all cakephp/* (cakephp3) packages, also phpstan, code standards, phpunit,.. run composer update
• Applying Rector Refactorings
• composer require --update-with-dependencies "phpunit/phpunit:^8.0"
• composer require --update-with-dependencies "cakephp/cakephp:4.0.*"
• Install fresh cakephp4 inside your app folder. Example: mkdir cakephp4 && cd cakeph4; and run composer create-project --prefer-dist cakephp/app:4.* .;
• compare your old cakephp files with files from cakephp4 folder, update all and copy missing files
• delete cakephp4 and upgrade folders
• don't forget at top of you php files to add <?php declare(strict_types=1);
• composer cs-check then composer cs-fix