public function Schema::addUniqueKey in Drupal 10

Same name in this branch

1. 10 core/lib/Drupal/Core/Database/Schema.php \Drupal\Core\Database\Schema::addUniqueKey()
2. 10 core/modules/sqlite/src/Driver/Database/sqlite/Schema.php \Drupal\sqlite\Driver\Database\sqlite\Schema::addUniqueKey()
3. 10 core/modules/pgsql/src/Driver/Database/pgsql/Schema.php \Drupal\pgsql\Driver\Database\pgsql\Schema::addUniqueKey()
4. 10 core/modules/mysql/src/Driver/Database/mysql/Schema.php \Drupal\mysql\Driver\Database\mysql\Schema::addUniqueKey()
5. 10 core/tests/fixtures/database_drivers/module/corefake/src/Driver/Database/corefakeWithAllCustomClasses/Schema.php \Drupal\corefake\Driver\Database\corefakeWithAllCustomClasses\Schema::addUniqueKey()

Add a unique key.

Parameters

$table: The table to be altered.

$name: The name of the key.

$fields: An array of field names.

Throws

\Drupal\Core\Database\SchemaObjectDoesNotExistException If the specified table doesn't exist.

\Drupal\Core\Database\SchemaObjectExistsException If the specified table already has a key by that name.

Overrides Schema::addUniqueKey

File

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

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);
  }
}