public function DefaultTableMapping::getFieldTableName in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php \Drupal\Core\Entity\Sql\DefaultTableMapping::getFieldTableName()
2. 10 core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php \Drupal\Core\Entity\Sql\DefaultTableMapping::getFieldTableName()

Gets the table name for a given column.

Parameters

string $field_name: The name of the entity field to return the column mapping for.

Return value

string Table name for the given field.

Throws

\Drupal\Core\Entity\Sql\SqlContentEntityStorageException

Overrides TableMappingInterface::getFieldTableName

File

core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php, line 356

Class

DefaultTableMapping

Defines a default table mapping class.

Namespace

Drupal\Core\Entity\Sql

Code

public function getFieldTableName($field_name) {
  $result = NULL;
  if (isset($this->fieldStorageDefinitions[$field_name])) {

    // Since a field may be stored in more than one table, we inspect tables
    // in order of relevance: the data table if present is the main place
    // where field data is stored, otherwise the base table is responsible for
    // storing field data. Revision metadata is an exception as it's stored
    // only in the revision table.
    $storage_definition = $this->fieldStorageDefinitions[$field_name];
    $table_names = array_filter([
      $this->dataTable,
      $this->baseTable,
      $this->revisionTable,
      $this
        ->getDedicatedDataTableName($storage_definition),
    ]);

    // Collect field columns.
    $field_columns = [];
    foreach (array_keys($storage_definition
      ->getColumns()) as $property_name) {
      $field_columns[] = $this
        ->getFieldColumnName($storage_definition, $property_name);
    }
    foreach ($table_names as $table_name) {
      $columns = $this
        ->getAllColumns($table_name);

      // We assume finding one field column belonging to the mapping is enough
      // to identify the field table.
      if (array_intersect($columns, $field_columns)) {
        $result = $table_name;
        break;
      }
    }
  }
  if (!isset($result)) {
    throw new SqlContentEntityStorageException("Table information not available for the '{$field_name}' field.");
  }
  return $result;
}