Hi,

I'm getting an error (Fatal error: Object::add_extension() - Can't find extension class for "CustomSiteConfig") on my live site but only once in a while. The site works fine most of the time and then now and again it gives me the error.

I've been working with SilverStripe for many years and never quite had this problem.

I'm using SS3.1, here is my code:

_config.php

<?php

global $project;
$project = 'mysite';

global $databaseConfig;
$databaseConfig = array(
	"type" => 'MySQLDatabase',
	"server" => 'localhost',
	"username" => 'root',
	"password" => 'root',
	"database" => 'SS_pbcv',
	"path" => '',
);

SSViewer::setOption('rewriteHashlinks', false);

// Set the site locale
i18n::set_locale('en_GB');

MySQLDatabase::set_connection_charset('utf8');

// Set the current theme. More themes can be downloaded from
SSViewer::set_theme('boilerplate');

// Site config & extentions
DataObject::add_extension('SiteConfig', 'CustomSiteConfig');

// Shorcodes
ShortcodeParser::get()->register('Vimeo',array('Page','VimeoShortCodeHandler'));
ShortcodeParser::get()->register('YouTube',array('Page','YouTubeShortCodeHandler'));

/********************** Security **********************/

// Set default login
Security::setDefaultAdmin('admin','password');

// Define the password validator
$pwdValidator = new PasswordValidator();
$pwdValidator->minLength(8);
$pwdValidator->checkHistoricalPasswords(2);
$pwdValidator->characterStrength(2,array('lowercase','digits'));
Member::set_password_validator($pwdValidator);

// Set the site locale
i18n::set_locale('en_UK');

// Enable nested URLs for this site (e.g. page/sub-page/)
if (class_exists('SiteTree')) SiteTree::enable_nested_urls();

FulltextSearchable::enable();

// Set the resizing image quality
GD::set_default_quality(95);

// Force enviroment to Dev
Director::set_environment_type("dev");

// Force cache to flush on page load if in Dev mode (prevents needing ?flush=1 on the end of a URL)
if (Director::isDev()) {
    SSViewer::flush_template_cache();
}

error_reporting(E_ALL);

/********************** Emails **********************/

//Set the admin email address
Email::setAdminEmail('me@peterbroom.co.uk');

//Set to CC all emails to
Email::cc_all_emails_to('me@peterbroom.co.uk');

/********************** Live environment **********************/

// uncomment this line for live environment
@include '_live-config.php';

_live-config.php

<?php

global $project;
$project = 'mysite';

global $databaseConfig;
$databaseConfig = array(
	"type" => 'MySQLDatabase',
	"server" => '****',
	"username" => '****',
	"password" => '****',
	"database" => '****',
	"path" => '',
);

// force enviroment to Live
Director::set_environment_type("live");

CustomSiteConfig.php

<?php

class CustomSiteConfig extends DataExtension{

    static $db = array(
    );

    static $has_many = array(
    );
}

Regards

Harley

Hi Harley,

The extension you pasted is empty - if there's nothing in there you should just remove it and that'll solve this. If there is something in there that you've just hidden for this post, I'd ensure you've done a /dev/build?flush=1 firstly. Also, your extension should be applied with:

SiteConfig::add_extension('CustomSiteConfig');

You mentioned that it only happens occasionally, which is odd given that a PHP class shouldn't be able to disappear at random. According to your _config.php, you're flushing the template cache on every page load - I wonder if this is somehow interfering with the class manifest as well (it definitely shouldn't affect this, but I've seen stranger), so I'd try removing that too.

Thanks for the suggestions,

Yeah I think you're right about the cache flush, that could be the problem. I've only got the custom site config there for future development so I'll just remove it for the time being and see what happens.

Thanks again!