Proper use of join

I got a problem - when i use code like this one

Code:

$this->db->select('u.id, u.username, c.name', false);
$this->db->from('user as u');
$this->db->join('companies as c', 'u.company_id = c.id');
$this->db->where('LOWER(u.username)=', strtolower('foobar'));
$query = $this->db->get();

i loose all my id.
I tried to change names of id fields to something like user_id, but CI don't work well without column named precisely id.

How to don't loose id field?
And is possible to get an object representation after a querry that uses a join statement?
$query->custom_result_object(self::$this_table_name);

Or it would be better just use a second query?

I think you're looking for

PHP Code:

select('u.id AS user_id, ...') 


Although, I'm only seeing where you would get u.id anyway, you've not called for any other ids in the select statement. 


To get the result object:

PHP Code:

$obj = $this->db->result() // or row() 


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