Codeigniter Strange Query Results.

Codeigniter Strange Query Results.

I am trying to build a messaging system in codeigniter. I have three
tables as below.
messages: id--thread_id--message_id--subject--message--sent
messages_thread id--thread_id
messages_participants id--thread_id--to_id--from_id--message_id
I am easily able to compase a new message, and the recipient can see that
a message has been recieved.
The problem comes when there is a reply. After replying the results are
duplicated. it show that the initial message was sent from both the
originator and the reciever and is returning 4 rows instead of the
expected 2 rows. can anyone tell me where I am going wrong?
Here is my model.
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();
}
My 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(){
$this->message_model->reply_to_thread();
redirect('messages/get_messages');
}
and my view thread view:
<div class="well">
<h3>View Messages</h3>
<?php foreach($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>
thanks in advance.