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How do you handle configuration overrides in Drupal?

How do you handle configuration overrides in Drupal?

In Drupal, handling configuration overrides allows you to customize or change configuration values in different environments (e.g., development, staging, production) without directly modifying the exported configuration files. You can override configuration using the settings.php file or a custom service. Here’s how to do it in minimal steps:

1. Open settings.php

Navigate to your Drupal project’s settings.php file, usually located at:

Example

/sites/default/settings.php

2. Add Configuration Overrides

To override configuration values, you can use the $config global variable within settings.php. Below is an example of overriding the site name and enabling caching in production:

Example

<?php
// In /sites/default/settings.php

// Override the site name.
$config['system.site']['name'] = 'My Custom Site Name';

// Enable caching in production.
if (getenv('ENVIRONMENT') === 'production') {
    $config['system.performance']['cache']['page']['max_age'] = 3600; // 1-hour cache.
} else {
    $config['system.performance']['cache']['page']['max_age'] = 0; // No cache for development.
}
?>

3. Override Specific Module Configurations

You can also override specific module configurations. For example, if you want to override Google Analytics tracking ID:

Example

<?php
// Override Google Analytics tracking ID for different environments.
if (getenv('ENVIRONMENT') === 'production') {
    $config['google_analytics.settings']['account'] = 'UA-XXXXXX-Y';
} else {
    $config['google_analytics.settings']['account'] = 'UA-XXXXXX-DEV';
}
?>

4. Clear Cache

After updating the settings.php file, clear the cache for the changes to take effect. You can do this by running the following command:

Example

drush cr

Alternatively, you can clear the cache from the Drupal admin interface at Configuration > Performance > Clear all caches.

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