How do I validate a form field in Codeigniter when

问题:

I have a form that worked perfectly until I switched the form to method="get". Now I can't get form_validation->run() to evaluate to TRUE.

This is how I open the form:

echo form_open( '', array( 'method' => 'get' ) );

This is the only piece that needs to validate:

$this->form_validation->set_rules( 'states', 'states', 'required' );

This is how I check to see if the form is validated:

if( $this->form_validation->run() == FALSE )

Is there something else I need to do to use Get parameters? I have get parameters turned on in the config ( $config['allow_get_array'] = TRUE; ). The form works ok if I skip the validation, so I know the CI system is reading the url fine.

回答1:

For CodeIgniter 3, you can pass the GET array into the set_data function. For example:
$this->form_validation->set_data($this->input->get());

回答2:

This post on the Codeigniter Forum suggests that form validation does not work with Get Parameters and that is just the way Codeigniter is.

回答3:

Just add:

$_POST['states'] = $this->input->get('states');

for validate states field in form validation just before

$this->form_validation->set_rules('states', 'states', 'required|trim');

回答4:

Codeigniter has changed since some of these posts. I think gX's answer is correct.

The instructions in the user manual, specifically section Validating an Array (other than $POST), worked great for me (as of today) and it's very simple.

Before your $this->form_validation->set_rules line, you specify the array to be validated:

$data = array(
    'username' => 'johndoe',
    'password' => 'mypassword',
    'passconf' => 'mypassword');

$this->form_validation->set_data($data);

回答5:

As you can see on the Form_validation.php file, they have hardcoded $_POST everywhere in the class ;-(

If you want to support $_GET as well, it's quite easy (and dirty Oooo), you can create a new property :

public function __construct($rules = array())
{
    $this->inputData = array_merge($_POST, $_GET);
    ...
}

And replace $_POST by $this->inputData everywhere in this class since there is no static methods.

I know it's not recommenced to edit vendor files, but really, you need it, do it ;-)

回答6:

Was trying to do exactly something similar but it boils down to the structure of your code.

1. Submit your form with the usual post method. This will allow you to carry out all post validations.
2. Then use the redirect() to send all your data to a different method within or outside your controller using '/'.
3. Finally, the method receiving all the parameters will handle the database transactions and present it to the view.

Hope it helps.