CodeIgniter insert into two tables - codeigniter

Question

This is my model and i have problem when i go create "pjesma", i choose "izvodjac" in the form, and how to implement this with codeigniter3, i have to insert values into "izvodi_pjesmu", from where do i get "pjesma_id" that i am just inserting, i hope its clear, if you see the EER diagram below you will understand i hope. Thank you.
diagram
controller method:
public function kreiraj()
{
if (isset($_POST['kreiraj']))
{
$data1 = array(
'naslov' => $this->input->post('naslov'),
'tablatura' => $this->input->post('tablatura'),
'korisnik_korisnik_id' => $_SESSION['korisnik_id']
);
$data2 = array(
'izvodjac_izvodjac_id' => $this->input->post('izvodjaci')
);
$this->form_validation->set_rules('izvodjaci','Izvođači','required|callback_check_default');
$this->form_validation->set_message('check_default', 'Morate odabrati izvođača');
$this->form_validation->set_rules('naslov', 'Naslov', 'required', array('required' => 'Naslov je obavezan'));
$this->form_validation->set_rules('tablatura', 'Tablatura', 'required', array('required' => 'Tablatura je obavezna'));
if ($this->form_validation->run() != FALSE)
{
$this->pjesma_model->kreiraj($data1, $data2);
redirect('pjesma', 'location');
}
}
$data['izvodjaci'] = $this->izvodjac_model->svi_izvodjaci();
$this->load->view('zaglavlje');
$this->load->view('pjesma_kreiraj', $data);
$this->load->view('podnozje');
}
model method:
public function kreiraj($data1, $data2)
{
$this->db->insert('izvodi_pjesmu', $data2);
$this->db->insert('pjesma', $data1);
}
view:
<h1>Kreiranje pjesme</h1>
<hr>
<div class="row">
<div class="col"></div>
<div class="col-9">
<?php if (validation_errors()): ?>
<div class="alert alert-info">
<?php echo validation_errors(); ?>
</div>
<?php endif; ?>
<?php echo form_open('pjesma/kreiraj'); ?>
<div class="form-group">
<label for="izvodjaci">Izvođač:</label>
<select class="form-control" name="izvodjaci" id="izvodjaci">
<option value="0">odabir izvođača</option>
<?php foreach($izvodjaci as $izvodjac): ?>
<option value="<?php echo $izvodjac->izvodjac_id; ?>"><?php echo $izvodjac->naziv; ?></option>
<?php endforeach; ?>
</select>
</div>
<div class="form-group">
<label for="naslov">Naslov:</label>
<input type="text" class="form-control" id="naslov" name="naslov" value="<?php echo set_value('naslov'); ?>" />
</div>
<div class="form-group">
<label for="tablatura">Tablatura:</label>
<textarea class="form-control" id="tablatura" name="tablatura"></textarea>
</div>
<button type="submit" class="btn btn-default" name="kreiraj">Kreiraj pjesmu</button>
<?php echo form_close(); ?>
</div>
<div class="col"></div>

Answer 1

Try this:
Controller:
public function kreiraj()
{
if (isset($_POST['kreiraj']))
{
$data1 = array(
'naslov' => $this->input->post('naslov'),
'tablatura' => $this->input->post('tablatura'),
'korisnik_korisnik_id' => $_SESSION['korisnik_id']
);
$this->form_validation->set_rules('izvodjaci','Izvođači','required|callback_check_default');
$this->form_validation->set_message('check_default', 'Morate odabrati izvođača');
$this->form_validation->set_rules('naslov', 'Naslov', 'required', array('required' => 'Naslov je obavezan'));
$this->form_validation->set_rules('tablatura', 'Tablatura', 'required', array('required' => 'Tablatura je obavezna'));
if ($this->form_validation->run() != FALSE)
{
$id= $this->pjesma_model->kreiraj($data1);
$data2 = array(
'izvodjac_izvodjac_id' => $this->input->post('izvodjaci'),
'pjesma_pjesma_id' => $id
);
$this->pjesma_model->pjesma_pjesmu($data2);
redirect('pjesma', 'location');
}
}
$data['izvodjaci'] = $this->izvodjac_model->svi_izvodjaci();
$this->load->view('zaglavlje');
$this->load->view('pjesma_kreiraj', $data);
$this->load->view('podnozje');
}
Model:
public function kreiraj($data1)
{
$this->db->insert('pjesma', $data1);
return $this->db->insert_id();
}
public function pjesma_pjesmu($data)
{
$this->db->insert('izvodi_pjesmu', $data);
return $this->db->insert_id();
}

Answer 2

You can use $this->db->insert_id();
Which will return the last inserted id. Add this line after inserting data in pjesma table which will return 'pjesma_id'. Then you can use it.
Like this -
public function kreiraj($data1, $data2)
{
$this->db->insert('pjesma', $data1);
// ge tlast inserted id
$pjesma_id = $this->db->insert_id();
$izvodjac_izvodjac_id = $data2['izvodjac_izvodjac_id'];
$data = array( 'pjesma_id' => $pjesma_id,
'izvodjac_izvodjac_id' => $izvodjac_izvodjac_id );
$this->db->insert('izvodi_pjesmu', $data);
}

Answer 3

You can do this thing like this, may be this will helps you,
$insert = array(
'naslov' => $this->input->post('naslov'),
'tablatura' => $this->input->post('tablatura'),
'korisnik_korisnik_id' => $_SESSION['korisnik_id']
);
$this->db->insert('tabl1', $insert);
$output["insert_id"] = $this->db->insert_id();
if (isset($output["insert_id"])) {
$insert = array(
'field1' => $value1,
'field2' => $value2,
);
$this->db->insert('tabl2', $insert);
}