How to display total comments - php

Question

Whatsup codeigniters!
I want to display total comments of my blog that I am building with codeigniter.
In my controller I have:
function index() {
$data['query'] = $this->blog_model->get_all_entries();
$this->load->view('blog/index',$data);
}
Function index() gets all posts.
and I have
public function post($id) {
$data['query'] = $this->blog_model->get_post($id);
$data['comments'] = $this->blog_model->get_post_comment($id);
$data['post_id'] = $id;
$data['total_comments'] = $this->blog_model->total_comments($id);
$this->load->view('blog/index',$data,TRUE);
$this->load->helper('form');
$this->load->library(array('form_validation','session'));
//validation rules for post function
$this->form_validation->set_rules('commentor','Name','required');
$this->form_validation->set_rules('email','Your email','required|valid_email');
$this->form_validation->set_rules('comment','Comment','required');
if($this->blog_model->get_post($id))
{
foreach($this->blog_model->get_post($id) as $row)
{
//set page title
$data['title'] = $row->entry_name;
}
if($this->form_validation->run() == FALSE)
{
//if validation runs FALSE
$this->load->view('blog/post',$data);
}
else
{
//if valid
$name = $this->input->post('commentor');
$email = strtolower($this->input->post('email'));
$comment = $this->input->post('comment');
$post_id = $id;
$this->blog_model->add_new_comment($post_id,$name,$email,$comment);
$this->session->set_flashdata('message', '1 new comment added!');
redirect('blog/post/'.$id);
}
}
else
show_404();
}
Basically, post($id) gets a post with id (single post) and display comments. I can print total comments number in single post. But how do i print total comments number in index() function where all posts are listed. Thank you!

Answer 1

Use this active record
$this->db->select("post_id , count(comment) as total_comments");
$this->db->group_by('post_id');
$query = $this->db->get('comments');
This generate this sql query
SELECT
post_id,
count(comment) as total_comments
FROM comments
GROUP BY post_id
Means this selects posts , count of posts for each comment and seperate them by post. For understanding Here is the table Structure
Comments
id count(comment) post_id
Now the query will first fetch all the comments then it will use group by to seperate posts giving you total comments for each post.

Answer 2

Try to do something like this
in Model
public function fetch_all_comment()
{
$query = $this->db->get('comments');
return $query->result();
}
In Controller
$data['all_comments'] = $this->model_name->fetch_all_comment();
$this->load->view('viewname',$data);
In View
For this you have to call model in your view. for example if you want to display post name.
Load Model in view
foreach ($all_comments as $row)
{
echo $row->post;
echo $total_no_post = $this->model_name->fetch_total_no_of_comment_in_post($row->postid);
}
Count no of comment in this function fetch_total_no_of_comment_in_post