Codeigniter DATABASE Trouble - php

Question

The thing is when i use this code
in my model :
public function get_all_subject_tasks(){
$this->db->select('*');
$this->db->from('task');
$this->db->where("user_id",$this->session->userdata('user_id'));
$this->db->order_by("task_id", "desc");
$query_result=$this->db->get();
$result=$query_result->result();
return $result;
}
in my controller:
public function subjects($t,$action=""){
$data=array();
$data['subject_tasks']=$this->Schoolmodel->get_all_subject_tasks($t);
if($action=='asyn'){
$this->load->view('theme/task',$data);
}else{
$this->load->view('theme/include/header');
$this->load->view('theme/include/school_sidebar');
$this->load->view('theme/task',$data);
$this->load->view('theme/include/footer');
}
}
in my php page:
<div class="panel-body">
<table id="teacher_table" class="table table-striped table-bordered table-condensed">
<th>Name</th><th><?php get_phrase('teacher_email') ?></th><th width="110"><?php get_phrase('action') ?></th>
<?php foreach($subject_tasks as $list){ ?>
<tr>
<td class="task_name"><?php echo $list->task_name ?></td>
<td class="task_desc"><?php echo $list->task_desc ?></td>
</tr>
<?php } ?>
</table>
</div>
I get all of the tasks that are in the database, without any subject filter.
So my question is
How do i make the page echo the tasks based on which subject they are in?
Also here is how i have setup my database structure
subject_id
task_id
task_name
task_desc
user_id
Where subject_id is the id of the subject where the task is inserted in.

Answer 1

<?php
// your model
public function getTask($subject_id)
{
$result = $this->db
->where("subject_id", $subject_id) // !!!
->where("user_id", $this->session->userdata('user_id')) // !!!
->order_by("task_id", "desc")
->get('tasks');
return $result->num_rows() > 0 ?
$result->result() : false;
}
// your class
class School extends CI_Controller {
public function __construct() {
parent::__construct();
if($this->session->userdata('logged_in')==FALSE){
redirect('User');
}
$this->load->database();
$this->load->model('Schoolmodel');
$this->load->library('form_validation');
}
public function subjects($subject_id,$action=""){
$data=array();
$data['subject_tasks'] = $this->Schoolmodel->getTask($subject_id);
if($action=='asyn'){
$this->load->view('theme/task',$data);
}else{
$this->load->view('theme/include/header');
$this->load->view('theme/include/school_sidebar');
$this->load->view('theme/task',$data);
$this->load->view('theme/include/footer');
}
}
}
?>
// your view
<div class="panel-body">
<table id="teacher_table" class="table table-striped table-bordered table-condensed">
<th>Name</th><th><?php get_phrase('teacher_email') ?></th><th width="110"><?php get_phrase('action') ?></th>
<?php if(false !== $subject_tasks) { foreach($subject_tasks as $list){ ?>
<tr>
<td class="task_name"><?php echo $list->task_name ?></td>
<td class="task_desc"><?php echo $list->task_desc ?></td>
</tr>
<?php } } ?>
</table>
</div>

Answer 2

This is not going to work:
$this->db->where("subject_id",$subject_id AND "user_id",$this->session->userdata('user_id'));
From Active Record documentations: Multiple calls to where will result in AND:
$this->db->where("subject_id", $subject_id);
$this->db->where("user_id", $this->session->userdata('user_id'));