function BaseFieldDefinition::getSchema

File

core/lib/Drupal/Core/Field/BaseFieldDefinition.php, line 663

Class

BaseFieldDefinition

A class for defining entity fields.

Namespace

Code

public function getSchema() {
  if (!isset($this->schema)) {
    // Get the schema from the field item class.
    $definition = \Drupal::service('plugin.manager.field.field_type')->getDefinition($this->getType());
    $class = $definition['class'];
    $schema = $class::schema($this);
    // Fill in default values.
    $schema += [
      'columns' => [],
      'unique keys' => [],
      'indexes' => [],
      'foreign keys' => [],
    ];
    // Merge custom indexes with those specified by the field type. Custom
    // indexes prevail.
    $schema['indexes'] = $this->indexes + $schema['indexes'];
    $this->schema = $schema;
  }
  return $this->schema;
}