Query building using Kohana Query Builder - php

Question

If I got this:
$result =
DB::select(
'orders.date_created'
)
->from('orders')
->execute()->as_array();
For normal, dsiplaying all orders date_created. Now I can filter by user, doing this ?user_id=112
This will make me having this:
if(isset($get['user_id']))
{
$result =
DB::select(
'orders.date_created'
)
->from('orders')
->where('user_id', '=', $get['user_id'])
->execute()->as_array();
}else{
$result =
DB::select(
'orders.date_created'
)
->from('orders')
->execute()->as_array();
}
Although this is no problem for me have this, but this get to be real much ugly code when I have 4 params to filter out from(4 where statements) e.g ?user_id=112&quantity=2&...
Can I somehow make a inline if/action statement, which would grab all user_ids if there's nothing in $get['user_id'] ?
So I can end up having only this:
$result =
DB::select(
'orders.date_created'
)
->from('orders')
->where('user_id', '=', (isset($get['user_id']) ? $get['user_id'] : 'GRAB ALL!'))
->execute()->as_array();
or is there another, even better way to do this?
Tried looking in Kohana docs if there's some ->if()->where()->exitif().. (just some imagination of how it could work)

Answer 1

You can modify Query object before executing:
$query = DB::select()->from(...);
if (isset($get['user_id'])) {
$query->where('user_id', '=', intval($get['user_id']));
}
if (isset($get['quantity'])) {
$query->where('quantity', '=', floatval($get['quantity']));
}
$result = $query->execute()->as_array();