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public function ResourceTypeField::hasOne in Drupal 9

Same name and namespace in other branches

8 core/modules/jsonapi/src/ResourceType/ResourceTypeField.php \Drupal\jsonapi\ResourceType\ResourceTypeField::hasOne()

Whether the field can only have one value.

Return value

bool TRUE if the field can have only one value, FALSE otherwise.

File

core/modules/jsonapi/src/ResourceType/ResourceTypeField.php, line 125

Class

ResourceTypeField: Abstract value object containing all metadata for a JSON:API resource field.

Namespace

Drupal\jsonapi\ResourceType

Code

public function hasOne() {
  return $this->hasOne;
}