public function ComputedFieldItem::isEmpty in Computed Field 8

Determines whether the data structure is empty.

Return value

bool TRUE if the data structure is empty, FALSE otherwise.

Overrides Map::isEmpty

File

src/Plugin/Field/FieldType/ComputedFieldItem.php, line 194

Class

ComputedFieldItem

Plugin implementation of the 'computed' field type.

Namespace

Drupal\computed_field\Plugin\Field\FieldType

Code

public function isEmpty() {
  $value = $this
    ->get('value')
    ->getValue();
  $data_type = $this
    ->getSetting('data_type');
  $empty = TRUE;

  // This will depend on the class of data type.
  switch ($data_type) {
    case 'int':
    case 'float':
    case 'numeric':

      // For numbers, the field is empty if the value isn't numeric.
      $empty = $value === NULL || !is_numeric($value);
      break;
    case 'varchar':
    case 'text':
    case 'longtext':

      // For strings, the field is empty if it doesn't match the empty string.
      $empty = $value === NULL || $value === '';
      break;
  }
  return $empty;
}