public function Schema::addUniqueKey in Drupal 9
Same name in this branch
- 9 core/lib/Drupal/Core/Database/Schema.php \Drupal\Core\Database\Schema::addUniqueKey()
- 9 core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php \Drupal\Core\Database\Driver\sqlite\Schema::addUniqueKey()
- 9 core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php \Drupal\Core\Database\Driver\pgsql\Schema::addUniqueKey()
- 9 core/lib/Drupal/Core/Database/Driver/mysql/Schema.php \Drupal\Core\Database\Driver\mysql\Schema::addUniqueKey()
- 9 core/tests/fixtures/database_drivers/module/corefake/src/Driver/Database/corefakeWithAllCustomClasses/Schema.php \Drupal\corefake\Driver\Database\corefakeWithAllCustomClasses\Schema::addUniqueKey()
Same name and namespace in other branches
- 8 core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php \Drupal\Core\Database\Driver\pgsql\Schema::addUniqueKey()
Add a unique key.
Parameters
$table: The table to be altered.
$name: The name of the key.
$fields: An array of field names.
Throws
\Drupal\Core\Database\SchemaObjectDoesNotExistException If the specified table doesn't exist.
\Drupal\Core\Database\SchemaObjectExistsException If the specified table already has a key by that name.
Overrides Schema::addUniqueKey
1 call to Schema::addUniqueKey()
- Schema::_createKeys in core/
lib/ Drupal/ Core/ Database/ Driver/ pgsql/ Schema.php
File
- core/
lib/ Drupal/ Core/ Database/ Driver/ pgsql/ Schema.php, line 805
Class
- Schema
- PostgreSQL implementation of \Drupal\Core\Database\Schema.
Namespace
Drupal\Core\Database\Driver\pgsqlCode
public function addUniqueKey($table, $name, $fields) {
if (!$this
->tableExists($table)) {
throw new SchemaObjectDoesNotExistException("Cannot add unique key '{$name}' to table '{$table}': table doesn't exist.");
}
if ($this
->constraintExists($table, $name . '__key')) {
throw new SchemaObjectExistsException("Cannot add unique key '{$name}' to table '{$table}': unique key already exists.");
}
$this->connection
->query('ALTER TABLE {' . $table . '} ADD CONSTRAINT ' . $this
->ensureIdentifiersLength($table, $name, 'key') . ' UNIQUE (' . implode(',', $fields) . ')');
$this
->resetTableInformation($table);
}