Codeigniter double rows result when using mysql join in model - php

Question

I'm working on codeigniter web app and I was doing some JOIN on model to show specific data from 3 tables but it gives me double row which should be only 1 row per data. It didn't happen when I only have 1 row data in my database but when I input the second data, it showed me 2 rows per data so I have 4 rows
The table name is siswa and I want to JOIN another table
This is the model for JOIN the database
function delete_siswa($id)
{
return $this->db->delete('siswa',array('id'=>$id));
}
function get_data_siswa()
{
$this->db->select('sw.id, sw.nama, sw.j_kelamin, sw.tmp_lahir, sw.tgl_lahir, sw.agama, sw.alamat, sw.no_tlp, sw.email, ot.n_ibu, ot.n_ayah, sk.nama_sek');
$this->db->from('siswa sw');
$this->db->join('orang_tua ot', 'ot.id=sw.id_orang_tua');
$this->db->join('sekolah sk', 'sk.id=sw.id_sekolah');
return $this->db->get('siswa')->result_array();
}
This is the controllers
function index()
{
$data['siswa'] = $this->Siswa_model->get_data_siswa();
$data['_view'] = 'siswa/index';
$this->load->view('layouts/main',$data);
}
This is the view
<tr>
<th>No</th>
<th>Nama</th>
<th>Jenis Kelamin</th>
<th>Tempat Lahir</th>
<th>Tanggal Lahir</th>
<th>Agama</th>
<th>Alamat</th>
<th>No. Telepon</th>
<th>Ibu</th>
<th>Ayah</th>
<th>Email</th>
<th>Nama Sekolah</th>
<th>Actions</th>
</tr>
</thead>
<tbody>
<?php
$no=1;
foreach($siswa as $s){ ?>
<tr>
<td><?php echo $no++;?></td>
<td><?php echo $s['nama']; ?></td>
<td><?php echo $s['j_kelamin']; ?></td>
<td><?php echo $s['tmp_lahir']; ?></td>
<td><?php echo $s['tgl_lahir']; ?></td>
<td><?php echo $s['agama']; ?></td>
<td><?php echo $s['alamat']; ?></td>
<td><?php echo $s['no_tlp']; ?></td>
<td><?php echo $s['n_ibu']; ?></td>
<td><?php echo $s['n_ayah']; ?></td>
<td><?php echo $s['email']; ?></td>
<td><?php echo $s['nama_sek']; ?></td>
<td>
<a class="btn btn-warning" href="<?php echo site_url('siswa/edit/'.$s['id']); ?>">Edit</a> |
<a class="btn btn-danger" href="<?php echo site_url('siswa/remove/'.$s['id']); ?>">Delete</a>
</td>
</tr>
<?php } ?>
</tbody>
This is the screenshoot of this error
It should be only one row per data but I don't really know because I'm still new for codeigniter. No error in the log

Answer 1

can you take the distinct record from the table, i think the join query will duplicate the data
$this->db->distinct();
will work for this