function AlterTest::testSimpleAlterSubquery

Tests that we can do basic alters on subqueries.

File

core/tests/Drupal/KernelTests/Core/Database/AlterTest.php, line 131

Class

AlterTest

Tests the hook_query_alter capabilities of the Select builder.

Namespace

Code

public function testSimpleAlterSubquery() : void {
  // Create a sub-query with an alter tag.
  $subquery = $this->connection
    ->select('test', 'p');
  $subquery->addField('p', 'name');
  $subquery->addField('p', 'id');
  // Pick out George.
  $subquery->condition('age', 27);
  $subquery->addExpression("[age]*2", 'double_age');
  // This query alter should change it to age * 3.
  $subquery->addTag('database_test_alter_change_expressions');
  // Create a main query and join to sub-query.
  $query = $this->connection
    ->select('test_task', 'tt');
  $query->join($subquery, 'pq', '[pq].[id] = [tt].[pid]');
  $age_field = $query->addField('pq', 'double_age');
  $name_field = $query->addField('pq', 'name');
  $record = $query->execute()
    ->fetch();
  $this->assertEquals('George', $record->{$name_field}, 'Fetched name is correct.');
  $this->assertEquals(27 * 3, $record->{$age_field}, 'Fetched age expression is correct.');
}