function Schema::addUniqueKey

Overrides Schema::addUniqueKey

File

core/modules/sqlite/src/Driver/Database/sqlite/Schema.php, line 724

Class

Schema

SQLite implementation of <a href="/api/drupal/core%21lib%21Drupal%21Core%21Database%21Schema.php/class/Schema/9" title="Provides a base implementation for Database Schema." class="local">\Drupal\Core\Database\Schema</a>.

Namespace

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);
    }
}