class Log in Drupal 9

Logs values without changing them.

The log plugin will log the values that are being processed by other plugins.

Example:

process:
  bar:
    plugin: log
    source: foo

Plugin annotation

@MigrateProcessPlugin(
  id = "log"
)

Hierarchy

• class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
  • class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
    • class \Drupal\migrate\ProcessPluginBase implements MigrateProcessInterface
      • class \Drupal\migrate\Plugin\migrate\process\Log

See also

\Drupal\migrate\Plugin\MigrateProcessInterface

1 file declares its use of Log

LogTest.php in core/modules/migrate/tests/src/Unit/process/LogTest.php

File

core/modules/migrate/src/Plugin/migrate/process/Log.php, line 28

Namespace

Drupal\migrate\Plugin\migrate\process

class Log extends ProcessPluginBase {

  /**
   * {@inheritdoc}
   */
  public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
    $is_object = is_object($value);
    if (is_null($value) || is_bool($value)) {
      $export = var_export($value, TRUE);
    }
    elseif (is_float($value)) {
      $export = sprintf('%f', $value);
    }
    elseif ($is_object && method_exists($value, 'toString')) {
      $export = print_r($value
        ->toString(), TRUE);
    }
    elseif ($is_object && method_exists($value, 'toArray')) {
      $export = print_r($value
        ->toArray(), TRUE);
    }
    elseif (is_string($value) || is_numeric($value) || is_array($value)) {
      $export = print_r($value, TRUE);
    }
    elseif ($is_object && method_exists($value, '__toString')) {
      $export = print_r((string) $value, TRUE);
    }
    else {
      $export = NULL;
    }
    $class_name = $export !== NULL && $is_object ? $class_name = get_class($value) . ":\n" : '';
    $message = $export === NULL ? "Unable to log the value for '{$destination_property}'" : "'{$destination_property}' value is {$class_name}'{$export}'";

    // Log the value.
    $migrate_executable
      ->saveMessage($message);

    // Pass through the same value we received.
    return $value;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property
DependencySerializationTrait::$_serviceIds	protected	property
DependencySerializationTrait::__sleep	public	function		2
DependencySerializationTrait::__wakeup	public	function		2
Log::transform	public	function	Performs the associated process. Overrides ProcessPluginBase::transform
MessengerTrait::$messenger	protected	property	The messenger.	27
MessengerTrait::messenger	public	function	Gets the messenger.	27
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	2
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginBase::__construct	public	function	Constructs a \Drupal\Component\Plugin\PluginBase object.	98
ProcessPluginBase::multiple	public	function	Indicates whether the returned value requires multiple handling. Overrides MigrateProcessInterface::multiple	3
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	4
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.