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function db_add_unique_key in Zircon Profile 8

Same name and namespace in other branches
  1. 8.0 core/includes/database.inc \db_add_unique_key()

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. E.g. $injected_database->schema()->addUniqueKey($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 871
Core systems for the database layer.

Code

function db_add_unique_key($table, $name, $fields) {
  return Database::getConnection()
    ->schema()
    ->addUniqueKey($table, $name, $fields);
}