Ajax call undefined validate of form

Question

I have a form wich allow to create content, it's build like :

1. get the owner part in a form
   • if the user isn't connected show him a login form and registration form
   • if the user is connected show him the user profile form to edit his informations
2. get the content form
   • include 1 by drupal get form
   • add an ajax system to add/remove lines of content creation

But when i clic on add or remove button (before i commented the user form and it works perfectly) i get this ajax error : Error : Call to undefined function user_profile_form_validate() dans form_execute_handlers() (ligne 1519 dans /Applications/MAMP/htdocs/fritr/includes/form.inc).

I've seen this post wich may contain the solution : https://www.drupal.org/node/1229882 Maybe it's because i don't use a form_load_include() but i don't know what include...

Here is my code :

/*

THE USER FORM

*/

function fritr_register_friterie_owner_form($form, &$form_state) { 
    // GET THE USER ENTITY IN FORM
    global $user;
    global $language;
    if(user_is_logged_in())
        $user = user_load($user->uid);
    form_load_include($form_state, 'inc', 'user', 'user.pages');

    // MAIN
    $form = array(
        '#type' => 'fieldset',            
        '#tree' => TRUE,
        '#collapsible' => FALSE,
        '#collapsed' => FALSE,            
        '#attributes' => array(
            'class' => array('clean-panel'),
        ),
    );

    // SHOW LOGIN FORM IF USER ISN'T CONNECTED
    $form['connexion'] = array(
        '#type' => 'fieldset',
        '#title' => t('Se connecter'),
        '#tree' => TRUE,
        '#collapsible' => FALSE,
        '#collapsed' => FALSE,
        '#weight' => 1,
        '#attributes' => array(
            'class' => array('clean-panel titled'),
        ),
    );    

    // USER FORM
    $form['user'] = array(
        '#type' => 'fieldset',
        '#title' => t('Editer ses informations'),
        '#tree' => TRUE,
        '#collapsible' => FALSE,
        '#collapsed' => FALSE,
        '#weight' => 2,
        '#attributes' => array(
            'class' => array('clean-panel titled'),
        ),
    );

    if (user_is_logged_in()) {        
        unset($form['connexion']);
        $form['user']['#title'] = t('Editer ses informations');
        $form['user']['content'] = drupal_get_form('user_profile_form', $user);            
        $form['user']['content']['#validate'] = array();
    } else {
        $form['connexion']['content'] = drupal_get_form('user_login');
        $form['user']['#title'] = t('Créer un compte');
        $form['user']['content'] = drupal_get_form('user_register_form');           
    }                      

    return $form;
}

function fritr_register_friterie_connexion_form_submit($form, &$form_state) {    
    $form_state['redirect'] = current_path();
}

/*

THE FRITERIE FORM WICH CONTAIN USER FORM

*/

/*
 * Implements hook_form().
 */
function fritr_register_friterie_form($form, &$form_state) {
    module_load_include('inc', 'fritr_register_friterie');
    form_load_include($form_state, 'inc', 'user', 'user.pages');    

    // USER REGISTER FORM       
    $form['owner'] = drupal_get_form('fritr_register_friterie_owner_form');
    $form['owner']['#weight'] = 2;

    $form['friteries'] = array(
        '#type' => 'fieldset',
        '#title' => t('Créer des friteries'),
        '#tree' => TRUE,
        '#collapsible' => FALSE,
        '#collapsed' => FALSE,
        '#weight' => 3,
        '#attributes' => array(
            'class' => array('clean-panel titled'),
        ),
    );    
    $form['friteries']['content'] = array(
        '#type' => 'container',
        '#weight' => 80,
        '#tree' => TRUE,        
        '#prefix' => '<div id="wrapper-friterie">',
        '#suffix' => '</div>',
    );

    $form_state['friterie_deltas'] = isset($form_state['friterie_deltas']) ? $form_state['friterie_deltas'] : range(0, 0);
    $field_count = $form_state['friterie_deltas'];

    foreach ($field_count as $delta) {
        $form['friteries']['content'][$delta] = array(
            '#type' => 'fieldset',            
            '#tree' => TRUE,
            '#collapsible' => FALSE,
            '#collapsed' => FALSE,
            '#weight' => 1,
            '#attributes' => array(
                'class' => array('clean-panel'),
            ),
        );

        // FRITERIE FORM
        $form['friteries']['content'][$delta]['remove_friterie'] = array(
            '#type' => 'submit',
            '#value' => t('-'),
            '#submit' => ['fritr_register_friterie_remove'],
            '#limit_validation_errors' => array(),            
            '#weight' => 1,
            '#ajax' => array(
                'callback' => 'fritr_register_friterie_remove_callback',
                'wrapper' => 'wrapper-friterie',
            ),            
            '#attributes' => array(
                'class' => ['button-small'],
            ),
            '#name' => 'remove_name_' . $delta,
        );
        $form['friteries']['content'][$delta]['friterie_fields'] = array(
            '#type' => 'fieldset',
            '#title' => t('Informations friterie (cliquez pour basculer l\'affichage)'),
            '#tree' => TRUE,
            '#collapsible' => TRUE,
            '#collapsed' => FALSE,
            '#weight' => 2,
            '#attributes' => array(
                'class' => array('clean-panel titled underline collapsible'),
            ),
        );                

        if (!isset($form['friteries']['content'][$delta]['#node'])) {
            global $language;
            $form['friteries']['content'][$delta]['#node'] = entity_create('node', array('type' => 'friterie', 'language' => $language->language));
        }
        field_attach_form('node', $form['friteries']['content'][$delta]['#node'], $form['friteries']['content'][$delta]['friterie_fields'], $form_state);        
    }

    $form['friteries']['content']['add_friterie'] = array(
        '#type' => 'submit',
        '#value' => t('Ajouter une friterie'),
        '#submit' => ['fritr_register_friterie_add'],
        '#limit_validation_errors' => array(),
        '#ajax' => array(
            'callback' => 'fritr_register_friterie_add_callback',
            'wrapper' => 'wrapper-friterie',
        ),
        '#weight' => 100,
    );       

    $form['#submit'][] = 'fritr_register_friterie_form_submit';
    $form['submit'] = array(
        '#type' => 'submit',
        '#value' => t('Enregistrer la friterie'),
        '#weight' => 100,
    );         

    dsm($form);
    dsm($form_state);

    return $form;
}

/*

THE AJAX AND SUBMIT CALLBACK OF BUTTONS WICH ADD OR REMOVE A FRITERIE NODE FORM CREATION

*/

function fritr_register_friterie_remove($form, &$form_state) {
    $delta_remove = $form_state['triggering_element']['#parents'][1];
    $k = array_search($delta_remove, $form_state['friterie_deltas']);
    unset($form_state['friterie_deltas'][$k]);

    $form_state['rebuild'] = TRUE;
    drupal_get_messages();
}

function fritr_register_friterie_remove_callback($form, &$form_state) {
    return $form['friteries']['content'];
}

function fritr_register_friterie_add($form, &$form_state) {
    $form_state['friterie_deltas'][] = count($form_state['friterie_deltas']) > 0 ? max($form_state['friterie_deltas']) + 1 : 0;

    $form_state['rebuild'] = TRUE;
    drupal_get_messages();
}

function fritr_register_friterie_add_callback($form, $form_state) {
    return $form['friteries']['content'];
}

Answer 1

You need to use form_load_include instead of module_load_include in forms:

Use this function instead of module_load_include() from inside a form constructor or any form processing logic as it ensures that the include file is loaded whenever the form is processed. In contrast to using module_load_include() directly, form_load_include() makes sure the include file is correctly loaded also if the form is cached.

e.g.

form_load_include($form_state, 'inc', 'user', 'user.pages');

Answer 2

Please include the required handler with form_load_include:

form_load_include($form_state, 'inc', 'user', 'user.pages');

You may have below question.

How to find the correct file to include?

You can use the function name as key word (e.g. function user_profile_form_validate) and search in your Drupal project, then you can find the file contains its definition. It is easy be done in Sublime or other editors/IDEs.