"Smart" force to category

klox7 I'm asking if it's possible for Cobalt to know if I add comment for category3.1 that it will save this comment in subcategory3.1.1?

Why do not you simply force it 3.1.1 or 3.2.1? But of course you can dothat in custom form template.

Sergey Why do not you simply force it 3.1.1 or 3.2.1?

This will be possible in parameters if I had separate types, type3 and type4, right?

Sergey But of course you can dothat in custom form template.

Do I copy default_form_default.php or one of the category template? Where can I found out how to force to category?

klox7 This will be possible in parameters if I had separate types, type3 and type4, right?

Why? Id you can fose already to category 3.1 why cannot you force to 3.1.1? Just force to diferent category.

klox7 Do I copy default_form_default.php or one of the category template? Where can I found out how to force to category?

make copy in template manager. Then edit and find lines where category field is displaied. Delete it and insert hidden field

<input type="text" name="jform[category][]" value="<?php echo $cval; ?>">

Where $cval is an ID of the category you want to post it. You may define this by looking at URL value. Or type_id.

Sergey Why? Id you can fose already to category 3.1 why cannot you force to 3.1.1? Just force to diferent category.

Force to category in comments parameters for one type has one input. You can insert multiple categories id's by separate them with comma. But if you disable select category option in form view then this is irrelevant. System will not know to which category to post.

How could I use something like this in the form and that will acctually work?

<?php 
$parent = ItemsStore::getRecord($item->parent_id);
if($parent->categories = 150): ?>
    <?php echo '<input type="text" name="jform[category][]" value="162">';?>
<?php endif; ?>

The idea is when users clicks add comment button and if parent item is in category 150 I want to force post to category 162.

How I understand you want prevet category select only if cat_id = 150, in otherwise user can select category, isn't it?

So I think you must use something like this:

<?php 
$parent = ItemsStore::getRecord($item->parent_id);
if($parent->category_id == 150): ?>
    <input type="hidden" name="jform[category][]" value="162">
<?php else: ?>
    <?php echo $this->loadTemplate('category_'.$params->get('tmpl_params.tmpl_category', 'default')); ?>
<?php endif; ?>

instead this line:

    <?php echo $this->loadTemplate('category_'.$params->get('tmpl_params.tmpl_category', 'default')); ?>

on line 196 in default_form_default.php