Posted by dennys on November 14, 2011 at 4:09pm
My requirement is to use Rules to modify a field value before save. The rule is field_final (changed) = field_final (unchanged) + field A (changed) - field A (unchanged)
I can use several actions (calculate a value, set a data value) to do above job and it works. But I want to use a custom PHP to do it, is there a sample code to do it?
I need to know how to get unchanged/changed value and how to set changed value, thanks.
Btw, I try use to the follow commands to test but they don't work (I use a hard-code value '123' to test only)
$node->field-final['und'][0]['value'] = 123;
$node->field-final[LANGUAGE_NONE][0]['value'] = 123;
Comments
Write an action!
I suggest that you write an custom action for this, instead of executing PHP stored in your database. Executing PHP from the database is slow, risky and difficult to version control – while writing a Rules action is easy and fun. :-)
I sugegst something like this:
<?php
/<strong>
* Implements hook_rules_action_info().
*/
mymodule_rules_action_info() {
$actions = array(
'mymodule_action_add_numbers' => array(
'parameter' => array(
'term1' => array(
'type' => 'integer',
'label' => t('First integer to add'),
),
'term2' => array(
'type' => 'integer',
'label' => t('Second integer to add'),
),
),
'provides' => array(
'sum' => array(
'type' => 'integer',
'label' => t('Sum'),
),
),
),
);
return $actions;
}
/</strong>
* Callback for the mymodule_action_add_numbers action.
*/
function mymodule_action_add_numbers($term1, $term2) {
$sum = $term1 + $term2;
return array(
'sum' => $sum,
);
}
?>
Some more introduction about writing Rules actions can be found here: http://nodeone.se/node/895
Good luck!
//Johan Falk
**
Check out NodeOne's Drupal Learning Library! 200+ screencasts and exercises, for Drupal introduction, advanced configuration, and coding. Creative Commons license!
The video is great, but I
The video is great, but I download the example from http://drupal.org/project/rules_example, it seems not the same as the video?
Probably more
I think the example code contains more than is covered in the videos. I hope it can be useful anyway. (Or are you missing some code, and that is problematic?)
Thanks, I'll try to read the
Thanks, I'll try to read the code. The video is good, the only problem is the character is not very clear and cannot use copy/paste to test.