abstract class Upsert in Drupal 8

General class for an abstracted "Upsert" (UPDATE or INSERT) query operation.

This class can only be used with a table with a single unique index. Often, this will be the primary key. On such a table this class works like Insert except the rows will be set to the desired values even if the key existed before.

Hierarchy

• class \Drupal\Core\Database\Query\Query implements PlaceholderInterface
  • class \Drupal\Core\Database\Query\Upsert implements \Drupal\Core\Database\Query\Countable uses InsertTrait

4 files declare their use of Upsert

NativeUpsert.php in core/lib/Drupal/Core/Database/Driver/pgsql/NativeUpsert.php

Upsert.php in core/lib/Drupal/Core/Database/Driver/sqlite/Upsert.php

Upsert.php in core/lib/Drupal/Core/Database/Driver/pgsql/Upsert.php

Upsert.php in core/lib/Drupal/Core/Database/Driver/mysql/Upsert.php

3 string references to 'Upsert'

Connection::upsert in core/lib/Drupal/Core/Database/Connection.php

Prepares and returns an UPSERT query object.

Connection::upsert in core/lib/Drupal/Core/Database/Driver/pgsql/Connection.php

Prepares and returns an UPSERT query object.

Connection::__construct in core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysqlDeprecatedVersion/Connection.php

Constructs a Connection object.

File

core/lib/Drupal/Core/Database/Query/Upsert.php, line 16

Namespace

Drupal\Core\Database\Query

abstract class Upsert extends Query implements \Countable {
  use InsertTrait;

  /**
   * The unique or primary key of the table.
   *
   * @var string
   */
  protected $key;

  /**
   * Constructs an Upsert object.
   *
   * @param \Drupal\Core\Database\Connection $connection
   *   A Connection object.
   * @param string $table
   *   Name of the table to associate with this query.
   * @param array $options
   *   (optional) An array of database options.
   */
  public function __construct(Connection $connection, $table, array $options = []) {
    $options['return'] = Database::RETURN_AFFECTED;
    parent::__construct($connection, $options);
    $this->table = $table;
  }

  /**
   * Sets the unique / primary key field to be used as condition for this query.
   *
   * @param string $field
   *   The name of the field to set.
   *
   * @return $this
   */
  public function key($field) {
    $this->key = $field;
    return $this;
  }

  /**
   * Preprocesses and validates the query.
   *
   * @return bool
   *   TRUE if the validation was successful, FALSE otherwise.
   *
   * @throws \Drupal\Core\Database\Query\NoUniqueFieldException
   * @throws \Drupal\Core\Database\Query\FieldsOverlapException
   * @throws \Drupal\Core\Database\Query\NoFieldsException
   */
  protected function preExecute() {

    // Confirm that the user set the unique/primary key of the table.
    if (!$this->key) {
      throw new NoUniqueFieldException('There is no unique field specified.');
    }

    // Confirm that the user did not try to specify an identical
    // field and default field.
    if (array_intersect($this->insertFields, $this->defaultFields)) {
      throw new FieldsOverlapException('You may not specify the same field to have a value and a schema-default value.');
    }

    // Don't execute query without fields.
    if (count($this->insertFields) + count($this->defaultFields) == 0) {
      throw new NoFieldsException('There are no fields available to insert with.');
    }

    // If no values have been added, silently ignore this query. This can happen
    // if values are added conditionally, so we don't want to throw an
    // exception.
    return isset($this->insertValues[0]) || $this->insertFields;
  }

  /**
   * {@inheritdoc}
   */
  public function execute() {
    if (!$this
      ->preExecute()) {
      return NULL;
    }
    $max_placeholder = 0;
    $values = [];
    foreach ($this->insertValues as $insert_values) {
      foreach ($insert_values as $value) {
        $values[':db_insert_placeholder_' . $max_placeholder++] = $value;
      }
    }
    $last_insert_id = $this->connection
      ->query((string) $this, $values, $this->queryOptions);

    // Re-initialize the values array so that we can re-use this query.
    $this->insertValues = [];
    return $last_insert_id;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
InsertTrait::$defaultFields	protected	property	An array of fields that should be set to their database-defined defaults.
InsertTrait::$insertFields	protected	property	An array of fields on which to insert.
InsertTrait::$insertValues	protected	property	A nested array of values to insert.
InsertTrait::$table	protected	property	The table on which to insert.
InsertTrait::count	public	function
InsertTrait::fields	public	function	Adds a set of field->value pairs to be inserted.
InsertTrait::getInsertPlaceholderFragment	protected	function	Returns the query placeholders for values that will be inserted.
InsertTrait::useDefaults	public	function	Specifies fields for which the database defaults should be used.
InsertTrait::values	public	function	Adds another set of values to the query to be inserted.
Query::$comments	protected	property	An array of comments that can be prepended to a query.
Query::$connection	protected	property	The connection object on which to run this query.
Query::$connectionKey	protected	property	The key of the connection object.
Query::$connectionTarget	protected	property	The target of the connection object.
Query::$nextPlaceholder	protected	property	The placeholder counter.
Query::$queryOptions	protected	property	The query options to pass on to the connection object.
Query::$uniqueIdentifier	protected	property	A unique identifier for this query object.
Query::comment	public	function	Adds a comment to the query.
Query::getComments	public	function	Returns a reference to the comments array for the query.
Query::nextPlaceholder	public	function	Gets the next placeholder value for this query object. Overrides PlaceholderInterface::nextPlaceholder
Query::uniqueIdentifier	public	function	Returns a unique identifier for this object. Overrides PlaceholderInterface::uniqueIdentifier
Query::__clone	public	function	Implements the magic __clone function.	1
Query::__sleep	public	function	Implements the magic __sleep function to disconnect from the database.
Query::__toString	abstract public	function	Implements PHP magic __toString method to convert the query to a string.	10
Query::__wakeup	public	function	Implements the magic __wakeup function to reconnect to the database.
Upsert::$key	protected	property	The unique or primary key of the table.
Upsert::execute	public	function	Runs the query against the database. Overrides Query::execute	2
Upsert::key	public	function	Sets the unique / primary key field to be used as condition for this query.
Upsert::preExecute	protected	function	Preprocesses and validates the query.
Upsert::__construct	public	function	Constructs an Upsert object. Overrides Query::__construct