How can I set a date to NULL in Yii?

Question

I have a date column that usually takes values as dd.MM.yyyy. Its validation rule in the model\'s rules() is this:

array(\'start, e         


        

Answer 1

in model rules():

array('start, end', 'date', 'format' => 'dd.MM.yyyy'),
array('start, end', 'default', 'setOnEmpty' => true, 'value' => null),

also,

if (empty($csv_data)) {
  $user->start = null;
} ...

should do the trick too.