/**
* Removes the result of query from this query.
*
* @param DataQuery $subtractQuery
* @param string $field
* @return $this
*/
public function subtract(DataQuery $subtractQuery, $field = 'ID')
{
$fieldExpression = $subtractQuery->expressionForField($field);
$subSelect = $subtractQuery->getFinalisedQuery();
$subSelect->setSelect(array());
$subSelect->selectField($fieldExpression, $field);
$subSelect->setOrderBy(null);
$subSelectSQL = $subSelect->sql($subSelectParameters);
$this->where(array($this->expressionForField($field) . " NOT IN ({$subSelectSQL})" => $subSelectParameters));
return $this;
}
/**
* Tests that getFinalisedQuery can include all tables
*/
public function testConditionsIncludeTables()
{
// Including filter on parent table only doesn't pull in second
$query = new DataQuery('DataQueryTest_C');
$query->sort('"SortOrder"');
$query->where(array('"DataQueryTest_C"."Title" = ?' => array('First')));
$result = $query->getFinalisedQuery(array('Title'));
$from = $result->getFrom();
$this->assertContains('DataQueryTest_C', array_keys($from));
$this->assertNotContains('DataQueryTest_E', array_keys($from));
// Including filter on sub-table requires it
$query = new DataQuery('DataQueryTest_C');
$query->sort('"SortOrder"');
$query->where(array('"DataQueryTest_C"."Title" = ? OR "DataQueryTest_E"."SortOrder" > ?' => array('First', 2)));
$result = $query->getFinalisedQuery(array('Title'));
$from = $result->getFrom();
// Check that including "SortOrder" prompted inclusion of DataQueryTest_E table
$this->assertContains('DataQueryTest_C', array_keys($from));
$this->assertContains('DataQueryTest_E', array_keys($from));
$arrayResult = iterator_to_array($result->execute());
$first = array_shift($arrayResult);
$this->assertNotNull($first);
$this->assertEquals('First', $first['Title']);
$second = array_shift($arrayResult);
$this->assertNotNull($second);
$this->assertEquals('Last', $second['Title']);
$this->assertEmpty(array_shift($arrayResult));
}