function Schema::addUniqueKey

Same name in this branch

11.1.x core/lib/Drupal/Core/Database/Schema.php \Drupal\Core\Database\Schema::addUniqueKey()
11.1.x core/modules/pgsql/src/Driver/Database/pgsql/Schema.php \Drupal\pgsql\Driver\Database\pgsql\Schema::addUniqueKey()
11.1.x core/modules/mysql/src/Driver/Database/mysql/Schema.php \Drupal\mysql\Driver\Database\mysql\Schema::addUniqueKey()

Overrides Schema::addUniqueKey

File

core/modules/sqlite/src/Driver/Database/sqlite/Schema.php, line 716

Class

Schema: SQLite implementation of \Drupal\Core\Database\Schema.

Namespace

Drupal\sqlite\Driver\Database\sqlite

Code

public function addUniqueKey($table, $name, $fields) {
    if (!$this->tableExists($table)) {
        throw new SchemaObjectDoesNotExistException("Cannot add unique key '{$name}' to table '{$table}': table doesn't exist.");
    }
    if ($this->indexExists($table, $name)) {
        throw new SchemaObjectExistsException("Cannot add unique key '{$name}' to table '{$table}': unique key already exists.");
    }
    $schema['unique keys'][$name] = $fields;
    $statements = $this->createIndexSql($table, $schema);
    foreach ($statements as $statement) {
        $this->connection
            ->query($statement);
    }
}