How to JOIN three tables in Codeigniter

Question

I'm using codeigniter framework to develop one music cms. i have 3 tables in mysql database, Currently im working in "Album" Table and "Model, Controller". i want to SELECT "Album" Table 1 and JOIN "Album" -> "cat_id" with "Category" -> "cat_id", and fetch all categories records.

Then i want to JOIN "Album" -> "album_id" on "Soundtrack" -> "album_id" then fetch all soundtrack records A to Z.

Please somebody help me to show proper codeigniter query, how i can SELECT and JOIN Tables then fetch records from 3 tables, ?

Table 1 -> Category

• cat_id

• cat_name

• cat_title

• date

  Table 2 -> Album

• cat_id

• album_id

• album_title

• album_details

  Table 3 -> Soundtrack

• album_id

• track_title

• track_url
• date

Answer 1

Use this code in model

public function funcname($id)
{
    $this->db->select('*');
    $this->db->from('Album a'); 
    $this->db->join('Category b', 'b.cat_id=a.cat_id', 'left');
    $this->db->join('Soundtrack c', 'c.album_id=a.album_id', 'left');
    $this->db->where('c.album_id',$id);
    $this->db->order_by('c.track_title','asc');         
    $query = $this->db->get(); 
    if($query->num_rows() != 0)
    {
        return $query->result_array();
    }
    else
    {
        return false;
    }
}

Answer 2

try this

In your model

If u want get all album data use

  function get_all_album_data() {

    $this->db->select ( '*' ); 
    $this->db->from ( 'Album' );
    $this->db->join ( 'Category', 'Category.cat_id = Album.cat_id' , 'left' );
    $this->db->join ( 'Soundtrack', 'Soundtrack.album_id = Album.album_id' , 'left' );
    $query = $this->db->get ();
    return $query->result ();
 }

if u want to get specific album data use

  function get_album_data($album_id) {

    $this->db->select ( '*' ); 
    $this->db->from ( 'Album' );
    $this->db->join ( 'Category', 'Category.cat_id = Album.cat_id' , 'left' );
    $this->db->join ( 'Soundtrack', 'Soundtrack.album_id = Album.album_id' , 'left' );
    $this->db->where ( 'Album.album_id', $album_id);
    $query = $this->db->get ();
    return $query->result ();
 }