Codeigniter：MySQL Where子句和引号

Question

Query in CodeIgniter:

$this->db->select('comments.created_at, comments.section_id, comments.submittedby_id, users.username, comments.text, sections.name');
$this->db->order_by('comments.created_at', 'desc');
$this->db->where('comments.submittedby_id',  'users.user_id'); 
$this->db->where('comments.section_id', 'sections.id'); 

$query = $this->db->get(array('comments', 'users', 'sections'),10);

Produce SQL Request:

SELECT pdb_comments.created_at, pdb_comments.section_id, pdb_comments.submittedby_id, pdb_users.username, pdb_comments.text, pdb_sections.name FROM (pdb_comments, pdb_users, pdb_sections) WHERE pdb_comments.submittedby_id = 'users.user_id' AND pdb_comments.section_id = 'sections.id' ORDER BY pdb_comments.created_at desc LIMIT 10

The issue is that the database prefix (pdb_) does not get added in the WHERE clause. I can manually insert the prefix by appending $this->db->dbprefix, but this doesn't fix the main problem.

Quotes:

`pdb_comments`.`submittedby_id` = 'pdb_users.user_id'

The quotes on the right side are not accurate, and generate 0 results for me. Is there any way to make CodeIgniter recognize the second half of the where clause as a piece of my table; thereby adding the database prefix, and properly placing the quotes by avoiding two joins? Is there another way to do this? Thanks in advance.

--

Jon

Answer 1

Use:

$this->db->select('comments.created_at, comments.section_id, comments.submittedby_id, users.username, comments.text, sections.name');
$this->db->from('comments');
$this->db->join('users', 'comments.submittedby_id=users.user_id'); 
$this->db->join('sections', 'comments.section_id=sections.id'); 
$this->db->order_by('comments.created_at', 'desc');
$query = $this->db->get();

instead.