function FieldStorageConfig::getSchema

Overrides FieldStorageDefinitionInterface::getSchema

File

core/modules/field/src/Entity/FieldStorageConfig.php, line 476

Class

FieldStorageConfig

Defines the Field storage configuration entity.

Namespace

Code

public function getSchema() {
    if (!isset($this->schema)) {
        // Get the schema from the field item class.
        $class = $this->getFieldItemClass();
        $schema = $class::schema($this);
        // Fill in default values for optional entries.
        $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;
}