db_add_unique_key($table, $name, $fields)
Adds a unique key.
Parameters
$table: The table to be altered.
$name: The name of the key.
array $fields: An array of field names.
Deprecated
as of Drupal 8.0.x, will be removed in Drupal 9.0.0. Instead, get a database connection injected into your service from the container, get its schema driver, and call addUniqueKey() on it. For example, $injected_database->schema()->addUniqueKey($table, $name, $fields);
See also
\Drupal\Core\Database\Schema::addUniqueKey()
Related topics
- Schema API
- API to handle database schemas.
File
- core/includes/database.inc, line 879
- Core systems for the database layer.
Code
function db_add_unique_key($table, $name, $fields) {
return Database::getConnection()->schema()->addUniqueKey($table, $name, $fields);
}
Please login to continue.