Caching Models with Memcached?

[eluser]freakylp[/eluser]
Im not so quite sure about caching models.
First of all you dont have the same queries except if you have only static queries ( with static I mean queries without any dynamic parameters ).

Caching models is not solution.If you cache the model you will not have fresh data too.
Lets say that we have News_model which has 3 methods.
News_model.php

Code:

public function Get_News_By_Id( $news_id )
    {
        $news_id = (int)$news_id;
        $query = $this->db->query("SELECT * FROM news WHERE id = '$news_id'");
        return $query->result();
    }
    
    
    
    public function Get_News_Title( $news_id )
    {
        $news_id = (int)$news_id;
        $query = $this->db->query("SELECT title FROM news WHERE id = '$news_id'");
        return $query->result();
    }

Lets say that we have a News_Controller:
News_Controller

Code:

class News_Controller extends Controller{

    public function __construct()
    {
        parent::__construct();
        $this->load->model('News_Model','news');    
    }
    
    
    public function Index()
    {
        $this->data['news']     = $this->news->Get_News_By_Id(5);
        $this->data['title']    = $this->news_Get_News_Title(5);    
    }
    
}

If we cache $this->news and parameter of methods of News_Model are not the same we will have 1 copy of News_model object resource but we dont have the same data.

What we shall do ?