Laravel - SELECT only certain columns within a `::with` controller function - select

Question

The following code I have is working perfectly fine, however, it returns more data than what is necessary from each table:
public function getIndex()
{
$alerts = Criteria::with('bedrooms', 'properties')
->where('user_id', '=', Auth::id())
->get();
$this->layout->content = View::make('users.alert.index',
array('alerts' => $alerts));
}
What I'd like to do is, for example, select only the bedroom column out of the bedroom table. As it stands now, it returns all columns.
I have tried:
public function getIndex()
{
$alerts = Criteria::with('bedrooms' => function($q){
$q->select('bedroom');
}, 'properties')
->where('user_id', '=', Auth::id())
->get();
$this->layout->content = View::make('users.alert.index',
array('alerts' => $alerts));
}
But I am presented with the following error:
syntax error, unexpected '=>' (T_DOUBLE_ARROW)
Any help as to how I can achieve this will be hugely appreciated.
Update
public function getIndex()
{
$alerts = Criteria::with(
['coordinate' => function($w){
$w->select('name', 'id');
}],
['bedrooms' => function($q){
$q->select('bedroom', 'criteria_id');
}]
, 'properties')
->where('user_id', Auth::id())
->get();
$this->layout->content = View::make('users.alert.index',
array('alerts' => $alerts));
}
The correct select query works for which ever is queried first. If I swap the queries around, the bedroom function works correctly, but the rest aren't eager loaded nor does the select query work.

Answer 1

Just pass an array there:
// note [ and ]
$alerts = Criteria::with(['bedrooms' => function($q){
$q->select('bedroom', 'PK / FK');
}, 'properties'])
Also mind that you need to select the keys of that relation (primary key/foreign key of the relation).

Answer 2

The answer to your update question is that you need to eager load other values in the same array some thing like this.
public function getIndex()
{
$alerts = Criteria::with(
['coordinate' => function($w)
{
$w->select('name', 'id');
},
'bedrooms' => function($q)
{
$q->select('bedroom', 'criteria_id');
}
, 'properties'])
->where('user_id', Auth::id())
->get();
$this->layout->content = View::make('users.alert.index',
array('alerts' => $alerts));
}