class Get

Gets the source value.

Available configuration keys:

• source: Source property.

The get plugin returns the value of the property given by the "source" configuration key.

Examples:

process:
  bar:
    plugin: get
    source: foo

This copies the source value of foo to the destination property "bar".

Since get is the default process plugin, it can be shorthanded like this:

process:
bar:
foo;

Get also supports a list of source properties.

Example:

process:
  bar:
    plugin: get
    source:
      - foo1
      - foo2

This copies the array of source values [foo1, foo2] to the destination property "bar".

If the list of source properties contains an empty element then the current value will be used. This makes it impossible to reach a source property with an empty string as its name.

Get also supports copying destination values. These are indicated by a starting @ sign. Values using @ must be wrapped in quotes.

process:
  foo:
    plugin: machine_name
    source: baz
  bar:
    plugin: get
    source: '@foo'

This will simply copy the destination value of foo to the destination property bar. foo configuration is included for illustration purposes.

Because of this, if the source or destination property actually starts with a "@", that character must be escaped with "@@". The referenced property becomes, for example, "@@@foo".

process:
  '@foo':
    plugin: machine_name
    source: baz
  bar:
    plugin: get
    source: '@@@foo'

This should occur extremely rarely.

Plugin annotation

@MigrateProcessPlugin(
  id = "get"
)

Hierarchy

• class \Drupal\Component\Plugin\PluginBase implements \Drupal\Component\Plugin\PluginInspectionInterface, \Drupal\Component\Plugin\DerivativeInspectionInterface
  • class \Drupal\Core\Plugin\PluginBase extends \Drupal\Component\Plugin\PluginBase uses \Drupal\Core\StringTranslation\StringTranslationTrait, \Drupal\Core\DependencyInjection\DependencySerializationTrait, \Drupal\Core\Messenger\MessengerTrait
    • class \Drupal\migrate\ProcessPluginBase extends \Drupal\Core\Plugin\PluginBase implements \Drupal\migrate\Plugin\MigrateProcessInterface
      • class \Drupal\migrate\Plugin\migrate\process\Get extends \Drupal\migrate\ProcessPluginBase

Expanded class hierarchy of Get

See also

\Drupal\migrate\Plugin\MigrateProcessInterface

File

core/modules/migrate/src/Plugin/migrate/process/Get.php, line 94

Namespace

class Get extends ProcessPluginBase {
    
    /**
     * Flag indicating whether there are multiple values.
     *
     * @var bool
     */
    protected $multiple;
    
    /**
     * {@inheritdoc}
     */
    public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
        $source = $this->configuration['source'];
        $properties = is_string($source) ? [
            $source,
        ] : $source;
        $return = [];
        foreach ($properties as $property) {
            if ($property || (string) $property === '0') {
                $return[] = $row->get($property);
            }
            else {
                $return[] = $value;
            }
        }
        if (is_string($source)) {
            $this->multiple = is_array($return[0]);
            return $return[0];
        }
        return $return;
    }
    
    /**
     * {@inheritdoc}
     */
    public function multiple() {
        return $this->multiple;
    }

}

Members