将数据库查询结果插入控制器中的变量-CODEIGNITER

Question

I have two tables.

The finalists table which lists the finalists with fields such as ID, Name. The Votes table which stores the votes for those finalists. One row in the vote tables where the field "confirmed" is yes means one vote.

To get the number of votes for a particular finalist I run

$this->db->where('finalist_id', $finalist_id);
$this->db->where('confirmed', 'yes');
$query = $this->db->get('votes');
return $query->num_rows();

And that gets me the number of rows.(votes)

Now what I want to do is loop through my finalists and list their name, their ID and their number of votes but I am struggling to write the code in my controller.

My controller :

$this->load->database();

            $query = $this->db->get('finalists');
            $data['finalists'] = $query->result_array();


                $this->db->where('finalist_id', $finalist->id);
                $this->db->where('confirmed', 'yes');
                $query = $this->db->get('votes')
                $data['votes'] = $query->result_array();


    $this->template
            ->build('admin/listing', $data);

My view:

<?php foreach ($finalists as $finalist): ?>



<li>ID:<?php echo $finalist['id'] ?>, Name:<?php echo $finalist['name'] ?>, votes:<?php echo $finalist['votes'] ?></li>


<?php endforeach ?>

SO what I am trying to achieve is to add the key vote and its result to the array $finalists - obviously to the right one, and I can't get my head around how to do that.

I suppose I should loop through the finalists and somehow insert the result of the query for that particular finalist.

Any help would be appreciated.

Answer 1

Try this into your controller

   $this->load->database();
   $this->db->select('*');
   $this->db->from('finalists');
   $this->db->join('votes',finalists.id = votes.finalist_id);
   $this->db->where('votes.confirmed', 'yes');

   $query = $this->db->get();
   $data['finalists'] = $query;


   $this->template->build('admin/listing', $data);

and this will your view

<?php foreach ($finalists->result() as $finalist){ ?>



<li>ID:<?php echo $finalist->id; ?>, Name:<?php echo $finalist->name; ?>, votes:<?php echo $finalist->votes; ?></li>


<?php } ?>

UPDATE

Answer 2

Work on the raw SQL query first, then you can figure out how to implement in codeigniter second. You have to have an understanding of the join first. Something like this should get you started:

SELECT f.id, f.name, COUNT(v.confirmed) AS votes
FROM finalists AS f
INNER JOIN votes AS v
  ON f.id = v.finalist_id
WHERE v.confirmed = 'yes'
GROUP BY f.id

This link should give you a better idea as to how to form more complex queries using codeigniter's ActiveRecord class. ellislab.com/codeigniter/user-guide/database/active_record.html