我有一个型号:
class Model_Alumno extends Model_Table {
public $entity_code='alumno';
function init(){
parent::init();
$this->defineAuditFields();
$this->addField('name')->caption('Nombre del Alumno')->mandatory(true);
$this->addField('is_inscrito')->type('boolean')->calculated(true);
}
function calculate_is_inscrito(){
what goes here????
}
}
我想将is_inscrito计算为Y或N,如果其他表中存在带有它的id的记录,那么我可以使用这样的SQL:
SELECT IF((SELECT count(*)FROM programaPago,alumno WHERE alumno_id = 相应的ID )> 0,'Y','N')
如何编写calculate_is_inscrito函数?
答案 0 :(得分:0)
function calculate_is_inscrito(){
return "IF( (SELECT count(*) FROM programaPago, alumno WHERE alumno_id=".
($this->table_alias?:$this->entity_code).".id)>0, 'Y', 'N')";
}