[development] Changing button #name?

Lee Rowlands leerowlands at rowlands-bcs.com
Thu Jun 24 00:38:28 UTC 2010

Hi Richard
Are you using '#tree' => TRUE?
If so, you can access $form_state['clicked_button']['parents'] which will be
an array of the keys of the parent elements. If each row in your table is
built as follows:
$form['rows'][$row_id]['field1'] = array(...),
$form['rows'][$row_id]['field2'] = array(...) etc and you are rendering this
as a table using a theme function and element_children to determine the
valid values of $row_id (is there any other way?) then your
['clicked_button']['parents'] will contain an array including the final op
but also the 'parent' $row_id, this can tell you which button was pressed.
Have a look at the quicktabs module for an example.
Lee Rowlands

-----Original Message-----
From: development-bounces at drupal.org [mailto:development-bounces at drupal.org]
On Behalf Of Richard Morse
Sent: Thursday, 24 June 2010 2:03 AM
To: development at drupal.org
Subject: Re: [development] Changing button #name?

On Jun 23, 2010, at 11:37 AM, Adam Gregory wrote:

> Actually all buttons in a Drupal form have the name "op" so that you can
> easily determine which button was pressed in the submit function. i.e. if
> ($op = 'blah) or switch ($op).
> If you are using the Drupal Ahah framework for this then your submit
> function should handle it. But since all your buttons are titled Remove,
> what you can do is use $form_state['clicked_button']['#id'] to determine
> which button was clicked in your submit function. As #id is built of the
> array key you give the element in the $form variable.

I know that by default they are all named 'op'. This is my problem; I cannot
distinguish the buttons by their '#value', because it is always the same.
I'm solving this by setting the '#name' to allow me to determine precisely
which button was clicked. If I don't set '#name', then *regardless* of which
button I press, the 'clicked_button' structure in the $form_state
corresponds to the last button of the same '#value' added to the form. Part
of the awkwardness here is that HTML doesn't allow you to display some text
in a button while having a different value.


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