public function FieldDefinition::setDefaultValueCallback in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Field/FieldDefinition.php \Drupal\Core\Field\FieldDefinition::setDefaultValueCallback()

Set the default value callback for the field.

Parameters

string $callback: The default value callback.

Return value

$this

File

core/lib/Drupal/Core/Field/FieldDefinition.php, line 178

Class

FieldDefinition

A class for defining entity field definitions.

Namespace

Drupal\Core\Field

Code

public function setDefaultValueCallback($callback) {
  if (isset($callback) && !is_string($callback)) {
    throw new \InvalidArgumentException('Default value callback must be a string, like "function_name" or "ClassName::methodName"');
  }
  $this->definition['default_value_callback'] = $callback;
  return $this;
}