Returns an SQL calculation, i.e. COUNT() or MAX()
| public calculate ( Model $Model, string $func, array $params = [] ) : string | ||
| $Model | Model | The model to get a calculated field for. |
| $func | string | Lowercase name of SQL function, i.e. 'count' or 'max' |
| $params | array | Function parameters (any values must be quoted manually) |
| return | string | An SQL calculation function |
/**
* test calculate to generate claculate statements on virtual fields
*
* @return void
*/
function testVirtualFieldsInCalculate()
{
$Article = ClassRegistry::init('Article');
$Article->virtualFields = array('this_moment' => 'NOW()', 'two' => '1 + 1', 'comment_count' => 'SELECT COUNT(*) FROM ' . $this->Dbo->fullTableName('comments') . ' WHERE Article.id = ' . $this->Dbo->fullTableName('comments') . '.article_id');
$result = $this->Dbo->calculate($Article, 'count', array('this_moment'));
$expected = 'COUNT(NOW()) AS `count`';
$this->assertEqual($expected, $result);
$result = $this->Dbo->calculate($Article, 'max', array('comment_count'));
$expected = 'MAX(SELECT COUNT(*) FROM comments WHERE `Article`.`id` = `comments`.`article_id`) AS `comment_count`';
$this->assertEqual($expected, $result);
}
/**
* test calculate to generate claculate statements on virtual fields
*
* @return void
*/
public function testVirtualFieldsInCalculate()
{
$Boat = ClassRegistry::init('Boat');
$commentsTable = $this->Dbo->fullTableName('comments', false, false);
$Boat->virtualFields = array('this_moment' => 'NOW()', 'two' => '1 + 1', 'comment_count' => 'SELECT COUNT(*) FROM ' . $commentsTable . ' WHERE Boat.id = ' . $commentsTable . '.article_id');
$result = $this->Dbo->calculate($Boat, 'count', array('this_moment'));
$expected = 'COUNT(NOW()) AS `count`';
$this->assertEquals($expected, $result);
$result = $this->Dbo->calculate($Boat, 'max', array('comment_count'));
$expected = "MAX(SELECT COUNT(*) FROM {$commentsTable} WHERE `Boat`.`id` = `{$commentsTable}`.`article_id`) AS `comment_count`";
$this->assertEquals($expected, $result);
}