Correct Form Validation Error Message for Codeigniter 2

Question

I have a drop down named "business_id".

<select name="business_id"> <option value="0">Select Business</option> More options... </select> 

Here is the validation rule, the user must select an option.

 $this->form_validation->set_rules('business_id', 'Business', 'greater_than[0]'); 

The problem with the error message: the "Business" field should contain a number greater than 0. Not very intuitive! I want him to say: "You have to choose a business."

I tried:

 $this->form_validation->set_message('Business', 'You must select a business'); 

But CI complete ignores this. Does anyone have a solution for this?

Answer 1

Do not try to set the default attribute value ...

 <select name="business_id"> <option value>Select Business</option> More options... </select> 

and then just use the form validation rule required ...

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

I suppose you could try changing the way you are also trying to set the message ...

 $this->form_validation->set_message('business_id', 'You must select a business'); instead of $this->form_validation->set_message('Business', 'You must select a business'); 

I'm not quite sure that this will do the trick.

Answer 2

I had the same requirement for adding validation error messages in code 2 (for example, "you must agree to our Terms of Use"). Naturally, it would be incorrect to redefine error messages for require and more_than, since they erroneously generate messages for the rest of the form. I extended the CI_Form_validation class and redefined the set_rules method to accept the new message parameter:

 <?php class MY_Form_validation extends CI_Form_validation { private $_custom_field_errors = array(); public function _execute($row, $rules, $postdata = NULL, $cycles = 0) { // Execute the parent method from CI_Form_validation. parent::_execute($row, $rules, $postdata, $cycles); // Override any error messages for the current field. if (isset($this->_error_array[$row['field']]) && isset($this->_custom_field_errors[$row['field']])) { $message = str_replace( '%s', !empty($row['label']) ? $row['label'] : $row['field'], $this->_custom_field_errors[$row['field']]); $this->_error_array[$row['field']] = $message; $this->_field_data[$row['field']]['error'] = $message; } } public function set_rules($field, $label = '', $rules = '', $message = '') { $rules = parent::set_rules($field, $label, $rules); if (!empty($message)) { $this->_custom_field_errors[$field] = $message; } return $rules; } } ?> 

With the class above, you should create your rule with a custom error message:

 $this->form_validation->set_rules('business_id', 'Business', 'greater_than[0]', 'You must select a business'); 

You can also use "% s" in your custom message, which will automatically populate the field name label.

Answer 3

If you want to configure error messages displayed with each rule, they can be found in the array at:

 /system/language/english/form_validation_lang.php 

Answer 4

You must expand the Form_validation library, as Anthony said.

For example, I am doing something similar in a file called MY_Form_validation.php , which should be placed in /application/libraries

 function has_selection($value, $params) { $CI =& get_instance(); $CI->form_validation->set_message('has_selection', 'The %s need to be selected.'); if ($value == -1) { return false; } else { return true; } } 

In your case, since your first option (the Guidance option - select ...) is 0 , you may want to change the conditional statement from -1 to 0 . Then, from now on, you can check this line for the following line:

 $this->form_validation->set_rules('business_id', 'Business', 'has_selection'); 

Hope this helps!

Answer 5

Here is a simple CI2 callback function that I used. I wanted something other than “mandatory” as the default parameter for validation. The documentation helps: http://codeigniter.com/user_guide/libraries/form_validation.html#callbacks

  public function My_form() { ...Standard CI validation stuff... $this->form_validation->set_rules('business_id', 'Business', 'callback_busid'); ... if ($this->form_validation->run() == FALSE) { return false; } else { ...process the form... $this->email->send(); } } // Close My_form method // Callback method function busid($str) { if ($str == '') { $this->form_validation->set_message('business_id', 'Choose a business, Mang!'); return FALSE; } else { return TRUE; } } // Close the callback method 

In your case, you can change the callback to check if($str<0) - I assume you used numbers in your select / dropdown menu.

If the callback returns false, the form is saved and an error message is displayed. Otherwise, it is passed and sent to the 'else' form method .

Answer 6

You may not like a bit of hacking, but I did it for a little change.

Example, I want to change the message "Email field must be unique."

I made it like

 <?php $error = form_error('email'); echo str_replace('field must be a unique value', 'is already in use.', $error); // str_replace('string to search/compare', 'string to replace with', 'string to search in') ?> 

If the line is found, then it prints our user message, otherwise it displays an error message, as it is "Email field must be a valid email address", etc.

Answer 7

The name of the rule is the last parameter.

Try:

 $this->form_validation->set_message('greater_than[0]', 'You must select a business'); 

Additional information: https://ellislab.com/codeigniter/user-guide/libraries/form_validation.html#validationrules

Answer 8

I have expanded the form_validation library with a simple function that ensures that the dropdown is not selected by default. Hope this helps.

applications / libraries / MY_Form_validation.php

 <?php if (!defined('BASEPATH')) exit('No direct script access allowed.'); class MY_Form_validation extends CI_Form_validation { function __construct() { parent::__construct(); $this->CI->lang->load('MY_form_validation'); } /** * Make sure a drop down field doesn't have its default value selected. * * @access public * @param string * @param field * @return bool * @author zechdc */ function require_dropdown($str, $string_to_compare) { return ($str == $string_to_compare) ? FALSE : TRUE; } } 

application / language / English / MY_Form_validation_lang.php

 $lang['require_dropdown'] = 'The %s field must have an item selected.'; 

How to use:

1) Add your form to the drop-down list:

 <select name="business_id"> <option value="select">Select Business</option> More options... </select> 

2) Create a validation rule. You may be able to set the value to 0 and use require_dropdown [0], but I have never tried this.

 $this->form_validation->set_rules('business_id', 'Business', 'require_dropdown[select]'); 

3) Set your own message: (or skip this step and use it in the language file.)

 $this->form_validation->set_message('business_id', 'You must select a business'); 

Answer 9

Create a method to invokecheck_username

01.

 public function username_check($str) { if ($str=="") { $this->form_validation->set_message('username_check', 'Merci d'indiquer le nombre d'adultes'); return FALSE; } else { return TRUE; } } 

- 02. Then put this verification code on your class

 $this->form_validation->set_rules('number_adults', 'Label Name','Your Message',) 'callback_username_check'); 

It can help you.

Answer 10

for those of you who are working on CodeIgniter 3, you can do the following:

 $this->form_validation->set_rules('business_id', 'Business', 'greater_than[0]', array( 'greater_than' => 'You must select a business', )); 

And if you are using CodeIgniter 2, you will need to extend and override the CI_Form_validation class ( https://ellislab.com/codeigniter/user-guide/general/creating_libraries.html for more information on how to do this) with the new CodeIgniter class 3 CI_Form_validation and use the function above.