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+--- Thread: Active Record - Group By (/showthread.php?tid=59459)
Active Record - Group By - El Forum - 10-08-2013
[eluser]Unknown[/eluser]
The tried code:
Code:
$this->db->select('*');
$this->db->from('documents_table');
$this->db->order_by("last_modified_date", "desc");
$this->db->group_by('document_id');
$query = $this->db->get();Table structure:
id , document_id , content , last_modified_date
Problem:
The design of the system means that when documents are updated, a actual new record is created with the same document_id and the updated content.
Now I need the documents displayed in a list, however if they are multiple documents with the same document_id (basically older versions of the file), only the latest version should be displayed. The current code outputs the first versions only, so this needs to be switched.
Is group_by the right method for this? Anyone with some experience can work out why its not working as intended, or am I just doing it wrong?