Upload files updated on CodeIgniter - codeigniter-3

Question

happy new year everyone.
I'm a little confused in the process of the updated data. This is my controller in codeigniter
function Ubah($id_pengetahuan) {
$data['page_title'] = 'Ubah Pengetahuan';
$ses_id = $this->session->id_pengguna;
$this->load->library('form_validation');
$this->form_validation->set_error_delimiters('<div class="alert alert-warning"><strong><i class="fa fa-bullhorn" aria-hidden="true"></i> PESAN : </strong>', '</div>');
$error_msg = array('required' => '%s yang Anda masukkan belum lengkap.');
$this->form_validation->set_rules('judul', 'Judul', 'required', $error_msg);
$this->form_validation->set_rules('konten', 'Konten', 'required', $error_msg);
if ($id_pengetahuan) {
$post = $this->mod_pengetahuan->getPengetahuan_id($id_pengetahuan);
$data['id_pengetahuan'] = $id_pengetahuan;
$data['id_pengguna'] = $ses_id;
$data['judul'] = $post->judul;
$data['konten'] = $post->konten;
$data['tanggal'] = $post->tanggal;
$data['url'] = $post->tanggal;
$data['kategori'] = $post->kategori;
$data['bagikan'] = $post->bagikan;
$data['status'] = $post->status;
}
if ($this->form_validation->run() == FALSE) {
$this->view('pengetahuan_edit', $data);
}
else {
$config['upload_path'] = './assets/img/profil/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '5000'; //kilobyte
$this->upload->initialize($config);
if ( !$this->upload->do_upload('url')){
$this->session->set_flashdata('save_gagal', 'Tipe File yang Anda Masukkan tidak sesuai.');
$this->view('pengetahuan_edit', $data);
}
else{
$save['id_pengetahuan'] = $id_pengetahuan;
$save['id_pengguna'] = $ses_id;
$save['judul'] = $this->input->post('judul');
$save['konten'] = $this->input->post('konten');
$save['tanggal'] = date('Y-m-d');
$save['url'] = $this->upload->data('file_name');
$save['kategori'] = $this->input->post('kategori');
$save['bagikan'] = $this->input->post('bagikan');
$save['status'] = '1';
$post = $this->mod_pengetahuan->savePengetahuan($save);
$this->session->set_flashdata('save_succes', 'Pengguna baru berhasil ditambahkan.');
redirect('pengetahuan');
}
}
}
I want when the user makes changes to the data, users are not required to upload files. but when users upload files then processes the code below will run
if ( !$this->upload->do_upload('url')){
$this->session->set_flashdata('save_gagal', 'Tipe File yang Anda Masukkan tidak sesuai.');
$this->view('pengetahuan_edit', $data);
}
Please help me master. thank you

Answer 1

Try like this...
function Ubah($id_pengetahuan) {
$data['page_title'] = 'Ubah Pengetahuan';
$ses_id = $this->session->id_pengguna;
$this->load->library('form_validation');
$this->form_validation->set_error_delimiters('<div class="alert alert-warning"><strong><i class="fa fa-bullhorn" aria-hidden="true"></i> PESAN : </strong>', '</div>');
$error_msg = array('required' => '%s yang Anda masukkan belum lengkap.');
$this->form_validation->set_rules('judul', 'Judul', 'required', $error_msg);
$this->form_validation->set_rules('konten', 'Konten', 'required', $error_msg);
if ($id_pengetahuan) {
$post = $this->mod_pengetahuan->getPengetahuan_id($id_pengetahuan);
$data['id_pengetahuan'] = $id_pengetahuan;
$data['id_pengguna'] = $ses_id;
$data['judul'] = $post->judul;
$data['konten'] = $post->konten;
$data['tanggal'] = $post->tanggal;
$data['url'] = $post->tanggal;
$data['kategori'] = $post->kategori;
$data['bagikan'] = $post->bagikan;
$data['status'] = $post->status;
}
if ($this->form_validation->run() == FALSE) {
$this->view('pengetahuan_edit', $data);
}
else {
$config['upload_path'] = './assets/img/profil/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '5000'; //kilobyte
$this->load->library('upload', $config);
if ( !$this->upload->do_upload('url')){
$this->session->set_flashdata('save_gagal', 'Tipe File yang Anda Masukkan tidak sesuai.');
$this->view('pengetahuan_edit', $data);
}
else{
$save['id_pengetahuan'] = $id_pengetahuan;
$save['id_pengguna'] = $ses_id;
$save['judul'] = $this->input->post('judul');
$save['konten'] = $this->input->post('konten');
$save['tanggal'] = date('Y-m-d');
$save['url'] = $this->upload->data('file_name');
$save['kategori'] = $this->input->post('kategori');
$save['bagikan'] = $this->input->post('bagikan');
$save['status'] = '1';
$post = $this->mod_pengetahuan->savePengetahuan($save);
$this->session->set_flashdata('save_succes', 'Pengguna baru berhasil ditambahkan.');
redirect('pengetahuan');
}
}
}