I am trying to set a form validation rule. It says Unable to access an error message corresponding to your field name Customer (validate_customer). Any help on that would be appreciated.

$this->form_validation->set_rules('customer_id', 'Customer' ,'required|callback_validate_customer');

And this is my validation methond.

function validate_customer() {
if((double)$this->input->post('paid_amount') == 0)
{
   $this->form_validation->set_message('validate_customer' , 'Can not sale.');
   return FALSE;
} else {
   return TRUE;
}
} 

CodePudding user response：

These methods are set_message, form_validation and callback_ no more in Codeigniter 4. For this, you need to use a custom rule.

Example:

<?php
namespace App\Validation;

class CustomRules{
    public function customerValidation( ... , array $data)){

    }  
}

And use it like

"customer_id" => "required|customerValidation[customer_id]"

Check these

1. Creating Custom Rules
2. How to Create Custom Validation Rule in CodeIgniter 4

CodePudding user response：

Finally this code works for me.

$this->form_validation->set_rules(
                'customer_id', 'Customer',
                'required|min_length[1]|max_length[12]|customer_due_check',
                array(
                        'required'      => 'You have not provided %s.',
                        'customer_due_check'     => 'This %s already exists.'
                )
        );