class Insert in Drupal 8

General class for an abstracted INSERT query.

Hierarchy

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

Related topics

Database abstraction layer

Allow the use of different database servers using the same code base.

5 files declare their use of Insert

DatabaseLegacyTest.php in core/tests/Drupal/KernelTests/Core/Database/DatabaseLegacyTest.php

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

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

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

TestDeprecatedTestHooks.php in core/modules/simpletest/tests/src/Kernel/TestDeprecatedTestHooks.php

2 string references to 'Insert'

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

Prepares and returns an INSERT 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/Insert.php, line 12

Namespace

Drupal\Core\Database\Query

class Insert extends Query implements \Countable {
  use InsertTrait;

  /**
   * A SelectQuery object to fetch the rows that should be inserted.
   *
   * @var \Drupal\Core\Database\Query\SelectInterface
   */
  protected $fromQuery;

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

  /**
   * Sets the fromQuery on this InsertQuery object.
   *
   * @param \Drupal\Core\Database\Query\SelectInterface $query
   *   The query to fetch the rows that should be inserted.
   *
   * @return $this
   *   The called object.
   */
  public function from(SelectInterface $query) {
    $this->fromQuery = $query;
    return $this;
  }

  /**
   * Executes the insert query.
   *
   * @return
   *   The last insert ID of the query, if one exists. If the query was given
   *   multiple sets of values to insert, the return value is undefined. If no
   *   fields are specified, this method will do nothing and return NULL. That
   *   That makes it safe to use in multi-insert loops.
   */
  public function execute() {

    // If validation fails, simply return NULL. Note that validation routines
    // in preExecute() may throw exceptions instead.
    if (!$this
      ->preExecute()) {
      return NULL;
    }

    // If we're selecting from a SelectQuery, finish building the query and
    // pass it back, as any remaining options are irrelevant.
    if (!empty($this->fromQuery)) {
      $sql = (string) $this;

      // The SelectQuery may contain arguments, load and pass them through.
      return $this->connection
        ->query($sql, $this->fromQuery
        ->getArguments(), $this->queryOptions);
    }
    $last_insert_id = 0;

    // Each insert happens in its own query in the degenerate case. However,
    // we wrap it in a transaction so that it is atomic where possible. On many
    // databases, such as SQLite, this is also a notable performance boost.
    $transaction = $this->connection
      ->startTransaction();
    try {
      $sql = (string) $this;
      foreach ($this->insertValues as $insert_values) {
        $last_insert_id = $this->connection
          ->query($sql, $insert_values, $this->queryOptions);
      }
    } catch (\Exception $e) {

      // One of the INSERTs failed, rollback the whole batch.
      $transaction
        ->rollBack();

      // Rethrow the exception for the calling code.
      throw $e;
    }

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

    // Transaction commits here where $transaction looses scope.
    return $last_insert_id;
  }

  /**
   * Implements PHP magic __toString method to convert the query to a string.
   *
   * @return string
   *   The prepared statement.
   */
  public function __toString() {

    // Create a sanitized comment string to prepend to the query.
    $comments = $this->connection
      ->makeComment($this->comments);

    // Default fields are always placed first for consistency.
    $insert_fields = array_merge($this->defaultFields, $this->insertFields);
    if (!empty($this->fromQuery)) {
      return $comments . 'INSERT INTO {' . $this->table . '} (' . implode(', ', $insert_fields) . ') ' . $this->fromQuery;
    }

    // For simplicity, we will use the $placeholders array to inject
    // default keywords even though they are not, strictly speaking,
    // placeholders for prepared statements.
    $placeholders = [];
    $placeholders = array_pad($placeholders, count($this->defaultFields), 'default');
    $placeholders = array_pad($placeholders, count($this->insertFields), '?');
    return $comments . 'INSERT INTO {' . $this->table . '} (' . implode(', ', $insert_fields) . ') VALUES (' . implode(', ', $placeholders) . ')';
  }

  /**
   * Preprocesses and validates the query.
   *
   * @return bool
   *   TRUE if the validation was successful, FALSE if not.
   *
   * @throws \Drupal\Core\Database\Query\FieldsOverlapException
   * @throws \Drupal\Core\Database\Query\NoFieldsException
   */
  protected function preExecute() {

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

      // We have to assume that the used aliases match the insert fields.
      // Regular fields are added to the query before expressions, maintain the
      // same order for the insert fields.
      // This behavior can be overridden by calling fields() manually as only the
      // first call to fields() does have an effect.
      $this
        ->fields(array_merge(array_keys($this->fromQuery
        ->getFields()), array_keys($this->fromQuery
        ->getExpressions())));
    }
    else {

      // 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.
    if (!isset($this->insertValues[0]) && count($this->insertFields) > 0 && empty($this->fromQuery)) {
      return FALSE;
    }
    return TRUE;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
Insert::$fromQuery	protected	property	A SelectQuery object to fetch the rows that should be inserted.
Insert::execute	public	function	Executes the insert query. Overrides Query::execute	3
Insert::from	public	function	Sets the fromQuery on this InsertQuery object.
Insert::preExecute	protected	function	Preprocesses and validates the query.
Insert::__construct	public	function	Constructs an Insert object. Overrides Query::__construct
Insert::__toString	public	function	Implements PHP magic __toString method to convert the query to a string. Overrides Query::__toString	3
InsertTrait::$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::__wakeup	public	function	Implements the magic __wakeup function to reconnect to the database.