Cakephp using an array variable in a find operation

I am creating a shortlist which is stored in a cake Session variable

$this->Session->read('Item.shorlist');

This contains a list of comma separated IDs eg. 1,2,3,4,5

$shortlist =  $this->Session->read('Item.shorlist');

I would like to perform a find operation using the comma separated IDs in this variable in the find conditions eg:

$shortlist = $this->Item->find('all', array('conditions' => array('Item.id' => array($shortlist))));

However, this only returns 1 set of data. If I manually put in an array eg:

$shor开发者_StackOverflow社区tlist = $this->Item->find('all', array('conditions' => array('Item.id' => array(1,2,3,4,5))));

I get all 5 records returned.

Any ideas how to get around this without performing multiple finds on each id? If I look at the SQL dump I can see WHERE Item.id = ('1,2,3,4,5') using the $shortlist variable whereas if I input it manually as comma delimited integers eg: WHERE Item.id IN (1, 2, 3, 4) then the sql query works as I would like it to. So I guess my question is how to convert a comma delimited string to comma separated integers within a variable so that the SQL does not throw an error?

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When you retrieve the session value by using this line $shortlist = $this->Session->read('Item.shorlist'); will be a string, please make sure it be an array.

Use explode $short_list_array = explode(',', $shortlist); function to convert it into array and use

$shortlist = $this->Item->find('all', array('conditions' => array('Item.id' => $short_list_array)));

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$shortlist = array_map('trim', explode(',',$shortlist));