php - Codeigniter 奇怪的查询结果

Question

我正在尝试在 CodeIgniter 中构建一个消息传递系统。我有如下三个表。

消息:

• 编号
• thread_id
• 消息编号
• 主题
• 留言
• 已发送

消息线程:

• 编号
• thread_id

messages_participants:

• 编号
• thread_id
• to_id
• 来自_id
• 消息编号

我可以轻松地撰写新邮件，并且收件人可以看到已收到邮件。

当有回复时，问题就来了。回复后结果重复。它显示初始消息是从发起者和接收者发送的，并且返回 4 行而不是预期的 2 行。谁能告诉我哪里出错了？

这是我的模型:

function reply_to_thread(){
    //Generate random string for the ticket number
    $rand = substr(str_shuffle(MD5(microtime())), 0, 11);
    //Add the random string to the hash
    $messageid =  $rand;
    $messageinsert = array(
        'message_id' => $messageid,
        'subject' => $this->input->post('subject'),
        'message' => $this->input->post('message'),
        'thread_id' => $this->input->post('thread_id'),

    );

    $participantsinsert = array(
        'message_id' => $messageid,
        'from_id' => $this->input->post('from_id'),
        'to_id' => $this->input->post('to_id'),
        'thread_id' => $this->input->post('thread_id'),
    );
    $this->db->insert('messages',$messageinsert);
    $this->db->insert('messages_participants',$participantsinsert);
}

 function view_thread($thread_id){
    $this->db->where('messages.thread_id', $thread_id);
    $this->db->join('messages_participants', 'messages_participants.thread_id = messages.thread_id');
    $this->db->join('users', 'messages_participants.from_id = users.id');
    $result = $this->db->get('messages');
    var_dump($result);
    return $result->result_array();
}

我的 Controller :

  function check_messages(){
    $id = $this->session->userdata('id');
    $data['thread'] = $this->message_model->check_messages($id);
    $this->load->view('messages/my_messages', $data);

}
function view_thread($thread_id){
    $data['thread'] = $this->message_model->view_thread($thread_id);
    $this->load->view('messages/view_thread',$data);
}
function reply(){
    $this->message_model->reply_to_thread();
    redirect('messages/get_messages');
}

我的 View 线程 View :

<div class="well">
  <h3>View Messages</h3>
  <?php foreach($thread as $threadfield):?>

  <div class="message">
    <img class="avatar pull-left" src="<?php echo $threadfield['avatar'];?>">
    <div class="message-actions">
      <button class="btn btn-success" id="reply">Reply</button>
    </div>
    <p>
      <strong>
        From: <a href="profile.html"> Users id: <?php echo $threadfield['from_id'];?></a>
      </strong>
      <span class="badge badge-important">Unread</span><br>
      <strong>Date:</strong> 
      <?php echo date('M j Y g:i A', strtotime($threadfield['sent']));?>
    </p>
    <p><strong>Subject:</strong> 
      <a href = "/messages/view_thread/<?php echo $threadfield['thread_id'];?>">
        <?php echo $threadfield['subject'];?>
      </a>
    </p>
    <p><strong>Message:</strong> <?php echo $threadfield['message'];?></p>
    <hr>
  </div>
  <?php endforeach; ?>
</div>
<div class="row-fluid" id="replyform" style="display: none">
  <div class="well">

    <h3>Reply to <?php echo $threadfield['username'];?>'s Message.</h3>

    <?php echo form_open('messages/reply');?>

    <input type="text" value="<?php echo $threadfield['thread_id'];?>" name="thread_id" id="thread_id">
    <input type="text" value="<?php echo $this->session->userdata('id');?>" name="from_id" id="from_id">
    <input type="text" value="<?php echo $threadfield['from_id'];?>" name="to_id" id="to_id">
    <input type="text" value="RE: <?php echo $threadfield['subject'];?>" name="subject" id="subject">
    <input type="text" placeholder="Message......." name="message" id="message">
    <button class="btn" type="submit">Submit Reply</button>
    <?php echo form_close();?>
  </div>

编辑:

我设法解决了这个问题，但它又产生了一个新问题。我通过修改连接解决了这个问题，所以我们没有绑定(bind)到用户但参与者的消息，但现在，我无法显示正确的用户数据来显示初始新消息，它总是显示最后的发件人详细信息或最后收件人的详细信息。这取决于我是否将连接设置为 from_id 或 to_id。有谁知道我如何将用户表连接到最后一条消息？

Answer 1

我在您的查询中没有看到任何显示最新记录的ORDER BY。

function view_thread($thread_id){
    $this->db->where('messages.thread_id', $thread_id);
    $this->db->join('messages_participants', 'messages_participants.thread_id = messages.thread_id');
    $this->db->join('users', 'messages_participants.from_id = users.id');
    $this->db->order_by('field_name_goes_here');//put the name of field to set order by..
    $result = $this->db->get('messages');
    return $result->result_array();
}