drupal

Update the 'pair' field using an expression to concatenate the fields.

$database = \Drupal::service('database');
$database->update('mono_currency_rates')
  ->expression('pair', "CONCAT(currency_code_sell, '/', currency_code_buy)")
  ->isNull('pair')
  ->execute();

Sort:

1. Install Drupal Console: If you haven't installed Drupal Console yet, you can do so by following the instructions on the Drupal Console website. You can install it globally or locally in your project.

2. Generate the Custom Entity: 

   Use the following command to generate a custom entity:

1. HttpFoundation: This component replaces PHP's native global variables, offering a more powerful and flexible way to handle HTTP requests and responses. It standardizes how Drupal handles web requests and responses, improving consistency and reliability.
2. Routing: Symfony's Routing component is used to map URLs to specific controllers and actions in Drupal.

Drupal's architecture is built on a modular framework that provides flexibility and extensibility. Key components of the Drupal architecture include:

Create in module directory file named drush.services.yml with similar content:

services:
  custom_base.commands:
    class: Drupal\custom_base\Commands\CustomCommands
    arguments:
      - '@config.factory'
      - '@entity_type.manager'
      - '@database'
    tags:
      -  { name: drush.command }

In Drupal\custom_base\src\Commands need to create file CustomCommands.php:

To remove files from the GIT repository based on .gitignore, without deleting them from the local file system:

git ls-files -i -c -X .gitignore | xargs git rm --cached

Programaticaly restore admin user could be done with this code:

use Drupal\user\Entity\User;
$user = User::create([ 
'name' => 'admin', 
'mail' => 'admin@example.com', 
'status' => 1,
'roles' => ['administrator'],
'pass' => 'newpassword',
]); 
$user->save();

<h1>{{ 'Hello world'|t }}</h1>
<div class="mt-3 alert alert-warning">
    <p>{% trans %}Do you know how translation works?{% endtrans %}</p>
</div>

Using translate function with parameters:

{{ 'Last checked: @time ago'|t({'@time': time}) }}

{{ "Text to translate"|t({}, {'context' : 'Context name'}) }}

and

Load Order and change it status to "Cancelled":

$order = \Drupal::entityTypeManager()
->getStorage('commerce_order')
 ->load(1);
$order->getState()->applyTransitionById('cancel');
$order->save();