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PODrupal 6 Validation for Form Callback Function
 

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  1. PODrupal 6 Validation for Form Callback Function
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    <p>I have a simple form with a select menu on the node display page. Is there an easy way to validate the form in my callback function? By validation I don't mean anything advanced, just to check that the values actually existed in the form array. For example, without ajax, if my select menu has 3 items and I add a 4th item and try to submit the form, drupal will give an error saying something similar to "an illegal choice was made, please contact the admin."</p> <p>With ajax this 4th item you created would get saved into the database. So do I have to write validation like</p> <pre><code>if ($select_item &gt; 0 &amp;&amp; $select_item &lt;= 3) { //insert into db } </code></pre> <p>Or is there an easier way that will check that the item actually existed in the form array? I'm hoping there is since without ajax, drupal will not submit the form if it was manipulated. Thanks.</p> <p><strong>EDIT:</strong> So I basically need this in my callback function?</p> <pre><code>$form_state = array('storage' =&gt; NULL, 'submitted' =&gt; FALSE); $form_build_id = $_POST['form_build_id']; $form = form_get_cache($form_build_id, $form_state); $args = $form['#parameters']; $form_id = array_shift($args); $form_state['post'] = $form['#post'] = $_POST; $form['#programmed'] = $form['#redirect'] = FALSE; drupal_process_form($form_id, $form, $form_state); </code></pre> <p>To get $_POST['form_build_id'], I sent it as a data param, is that right? Where I use form_get_cache, looks like there is no data. Kind of lost now.</p>
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    1. COWhat is your goal exactly? It sounds like you are heading down the wrong track here.
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    2. COSorry if I didn't explain it too well, my goal is simply to check that the option exists within the form select array and hasn't been manipulated. For example, let's say my select menu has 3 items, red, green, blue. Now someone attempts to enter bogus info to my database and adds a fourth option, black. If I submit this form without ajax, Drupal will know that black never existed in the array and will say an illegal choice was made. However, if I use ajax with a callback function, this basic validation does not occur so that value of black will be inserted. Hope that clears things up.
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