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Whatsup 代码点火器！我想显示我正在使用 codeigniter 构建的博客的总评论。在我的控制器中，我有：

   function index() {

          $data['query'] = $this->blog_model->get_all_entries();
          $this->load->view('blog/index',$data);
   }

函数 index() 获取所有帖子。我有

  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();
   }

基本上， post($id) 获取带有 id 的帖子（单个帖子）并显示评论。我可以在单个帖子中打印总评论数。但是我如何在列出所有帖子的 index() 函数中打印总评论数。谢谢！

4

2 回答 2

0

尝试在模型中做这样的事情

public function fetch_all_comment()
{
      $query = $this->db->get('comments');
      return $query->result();
}

在控制器中

$data['all_comments'] = $this->model_name->fetch_all_comment();
 $this->load->view('viewname',$data);

在视图中

为此，您必须在视图中调用模型。例如，如果您想显示帖子名称。

在视图中加载模型 

  foreach ($all_comments as $row)
        {
            echo $row->post;
          echo $total_no_post = $this->model_name->fetch_total_no_of_comment_in_post($row->postid);
        }

统计此函数中的评论数量fetch_total_no_of_comment_in_post

于 2012-09-03T09:16:05.270 回答
0

使用此活动记录

$this->db->select("post_id , count(comment) as total_comments");    
$this->db->group_by('post_id');
$query = $this->db->get('comments');

这会生成这个 sql 查询 

SELECT 
     post_id,
     count(comment) as total_comments
FROM comments
GROUP BY post_id

意味着这会选择帖子，每个评论的帖子计数并按帖子分开。为了理解这里是表结构

Comments
id    count(comment)    post_id

现在查询将首先获取所有评论，然后它将使用 group by 来分隔帖子，为您提供每个帖子的总评论。

于 2012-09-03T09:52:40.377 回答