7.x database_test.test DatabaseDeleteTruncateTestCase::testSubselectDelete()

Confirm that we can use a subselect in a delete successfully.

File

modules/simpletest/tests/database_test.test, line 1094

Class

DatabaseDeleteTruncateTestCase
Delete/Truncate tests.

Code

function testSubselectDelete() {
  $num_records_before = db_query('SELECT COUNT(*) FROM {test_task}')->fetchField();
  $pid_to_delete = db_query("SELECT * FROM {test_task} WHERE task = 'sleep'")->fetchField();

  $subquery = db_select('test', 't')
    ->fields('t', array('id'))
    ->condition('t.id', array($pid_to_delete), 'IN');
  $delete = db_delete('test_task')
    ->condition('task', 'sleep')
    ->condition('pid', $subquery, 'IN');

  $num_deleted = $delete->execute();
  $this->assertEqual($num_deleted, 1, "Deleted 1 record.");

  $num_records_after = db_query('SELECT COUNT(*) FROM {test_task}')->fetchField();
  $this->assertEqual($num_records_before, $num_records_after + $num_deleted, 'Deletion adds up.');
}