protected function SqlContentEntityStorageSchema::deleteSharedTableSchema in Zircon Profile 8

Same name and namespace in other branches

1. 8.0 core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php \Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema::deleteSharedTableSchema()

Deletes the schema for a field stored in a shared table.

Parameters

\Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition: The storage definition of the field being deleted.

File

core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php, line 1207

Contains \Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema.

Class

SqlContentEntityStorageSchema

Defines a schema handler that supports revisionable, translatable entities.

Namespace

Drupal\Core\Entity\Sql

Code

protected function deleteSharedTableSchema(FieldStorageDefinitionInterface $storage_definition) {

  // Make sure any entity index involving this field is dropped.
  $this
    ->deleteEntitySchemaIndexes($this
    ->loadEntitySchemaData($this->entityType), $storage_definition);
  $deleted_field_name = $storage_definition
    ->getName();
  $table_mapping = $this->storage
    ->getTableMapping($this->entityManager
    ->getLastInstalledFieldStorageDefinitions($this->entityType
    ->id()));
  $column_names = $table_mapping
    ->getColumnNames($deleted_field_name);
  $schema_handler = $this->database
    ->schema();
  $shared_table_names = array_diff($table_mapping
    ->getTableNames(), $table_mapping
    ->getDedicatedTableNames());

  // Iterate over the mapped table to find the ones that host the deleted
  // field schema.
  foreach ($shared_table_names as $table_name) {
    foreach ($table_mapping
      ->getFieldNames($table_name) as $field_name) {
      if ($field_name == $deleted_field_name) {
        $schema = $this
          ->getSharedTableFieldSchema($storage_definition, $table_name, $column_names);

        // Drop indexes and unique keys first.
        if (!empty($schema['indexes'])) {
          foreach ($schema['indexes'] as $name => $specifier) {
            $schema_handler
              ->dropIndex($table_name, $name);
          }
        }
        if (!empty($schema['unique keys'])) {
          foreach ($schema['unique keys'] as $name => $specifier) {
            $schema_handler
              ->dropUniqueKey($table_name, $name);
          }
        }

        // Drop columns.
        foreach ($column_names as $column_name) {
          $schema_handler
            ->dropField($table_name, $column_name);
        }

        // After deleting the field schema skip to the next table.
        break;
      }
    }
  }
  $this
    ->deleteFieldSchemaData($storage_definition);
}