set_message() from form_validation

Hi guys,
I can't understand how to use set_message() form from_validation libraries.
I've read doc, consult stackoverflow and I can't figure it out on how to use it...
What I'm trying to achieve (for now) is checking if a checkbox is cheked or not...

PHP Code:

/*just output the page where user can compile a form*/
 public function nuovocosplay()
    {
      $this->load->view('auth/template/auth_header', $this->pagedata);
      $this->load->view('auth/template/auth_nav', $this->cliente);
      $this->load->view('auth/clienti/auth_sidebar');
      $this->load->view('auth/clienti/nuovocosplay');
      $this->load->view('auth/template/auth_footer');
    } 


This is the part in nuovocosplay.php view that call the checkbox and the error

Code:

                      <?php echo form_error('accetta_misure', '<div class="error">', '</div>'); ?>

                      <?php echo form_checkbox('accetta_misure','accetta', FALSE); ?>

PHP Code:

/*this is the validation that call the misure_db model function to write data to DB*/
    public function misure_validation() {
      $this->load->library('form_validation');
      $this->form_validation->set_rules('accetta_misure','accetta','required|md5|trim');
      // la funzione run ritorna un true solo se le regole sopra sono verificate
      if ($this->form_validation->run() == true) {
        $this->misure_db();
      } else {
        $this->form_validation->set_message('accetta_misure','accetta', 'devi accettare i termini e le condizioni della commissione.');
        $this->nuovocosplay(); //ritorna alla schermata delle misure
      }
    } 


I really don't understand what's wrong, I've read that I have to use callbacks? but how...

Thank you in advance and sorry for my noobness

A callback is just another function / method in you code.

function checkbox_callback(){}

You then need to add the callback function / method name to the set_rule

What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )

A callback is just another function / method in you code.

function checkbox_callback(){}

You then need to add the callback function / method name to the set_rule

yes...I've already used a callback for my login system...the problem is that I don't know what code to write in the callback if I've already coded the check in the misure_validation()

PHP Code:

/*Invio dati al modello per l'inserimento dei dati nel db*/
    public function misure_validation() {
      $this->load->library('form_validation');
      $this->form_validation->set_rules('accetta_misure','accetta','required|md5|trim|callback_convalida_tos');
      // la funzione run ritorna un true solo se le regole sopra sono verificate
      if ($this->form_validation->run() == true) {
        $this->misure_db();
      } else {
        $this->nuovocosplay(); //ritorna alla schermata delle misure
      }
    }

    public function convalida_tos()
    {
      if (isset($_POST['accetta_misure'])) {
         return true;
      } else {
        $this->form_validation->set_message('convalida_tos', 'devi accettare i termini e le condizioni della commissione.');
        return false;
      }
    } 


I'm trying anything and nothing seems to work

PHP Code:

/*Invio dati al modello per l'inserimento dei dati nel db*/
    public function misure_validation() {
      $this->load->library('form_validation');
      $this->form_validation->set_rules('accetta_misure','accetta','required|md5|trim|callback_convalida_tos');
      // la funzione run ritorna un true solo se le regole sopra sono verificate
      if ($this->form_validation->run() == true) {
        $this->misure_db();
      } else {
        $this->nuovocosplay(); //ritorna alla schermata delle misure
      }
    }

    public function convalida_tos()
    {
      if (isset($_POST['accetta_misure'])) {
         return true;
      } else {
        $this->form_validation->set_message('convalida_tos', 'devi accettare i termini e le condizioni della commissione.');
        return false;
      }
    } 


I'm trying anything and nothing seems to work

Here is a little example with checkbox:

Controller: (Welcome.php)

PHP Code:

public function index()
 {
 $this->load->helper(array('form', 'url'));
 $this->load->library('form_validation'); 
 $this->form_validation->set_rules('user', 'User', 'required');
 $this->form_validation->set_rules('agree', 'Acceta', 'required');

 if ($this->form_validation->run() == TRUE)
 {
 //Here save your data
 $data['post'] = $this->input->post();
 var_dump($data);
 }
 else
 {
 $this->load->view('formulario');
 }
 } 


View (formulario.php)

PHP Code:

<body>

<div id="container">
 <h1>Form Validation Testing</h1>
 <div id="body">
 <?php echo validation_errors(); ?>
 <?php echo form_open('welcome'); ?>
 <h5>Username</h5>
 <input type="text" name="user" value="<?php echo set_value('user'); ?>" size="50" />
 <h5>Accetare</h5>
 <!--<input type="checkbox" name="agree" value="1" /> Funziona anche in questo modo -->
 <?php echo form_checkbox('agree','Acceta', FALSE); ?>
 <div><input type="submit" value="Submit" /></div>
 </form>
 </div>
</div>

</body> 


but you don't set a custom error message in your example

but you don't set a custom error message in your example

PHP Code:

// If you need to set a custom error message for a particular field on some particular rule, use the set_rules() method:

$this->form_validation->set_rules('field_name', 'Field Label', 'rule1|rule2|rule3',
        array('rule2' => 'Error Message on rule2 for this field_name')
);

// Where rule corresponds to the name of a particular rule, and Error Message is the text you would like displayed. 


What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )