[drupal-devel] [bug] form_checkboxes saves "no selection" as string

chx drupal-devel at drupal.org
Fri Apr 8 07:19:33 UTC 2005

Issue status update for http://drupal.org/node/18663

 Project:      Drupal
 Version:      cvs
 Component:    base system
 Category:     bug reports
 Priority:     critical
 Assigned to:  chx
 Reported by:  killes at www.drop.org
 Updated by:   chx
 Status:       patch
 Attachment:   http://drupal.org/files/issues/form_checkboxes_2.patch (1.9 KB)

killes did not like the previous version.


Previous comments:

March 10, 2005 - 02:51 : killes at www.drop.org

If you select nothing from a set of checkboxes an empty string is save
to the variables table. This is a problem if the calling code assumes,
it would get an array.
We should make it save an empty array. The problem is the form_hidden
field that we add. even if we replace form_hidden($name, 0) by
form_hidden($name, array()) it isn't going to work, because the empty
array is eaten by htmlspecialchars.
redLED found this bug and he does not like it:
02:53 < redLED> i just like things saying 'CRITICAL' in red
02:53 < redLED> it gives this warm impending doom feeling
02:53 < redLED> and is generally associated with nuclear reactors in
people's subconsciousness
Suggestions welcome.


March 12, 2005 - 19:47 : Steven

There is no way to fix it in form_checkboxes() itself afaik, because
even without htmlspecialchars, it would still come out as "Array". You
can only create arrays indirectly through form submissions, by naming
your values "foo[]". But you can not create empty arrays this way.
So it is really up to the module which uses form_checkboxes() to handle
this. A simple is_array() should do the trick.


March 28, 2005 - 17:27 : chx

Attachment: http://drupal.org/files/issues/checkboxes.patch (1.71 KB)

system_settings_save can not really cope with this situation. This makes
a problem with empty node options. And the fact that we have a check
everywhere we use form_checkboxes is error prone, too. Here is a patch.
If this accepted I'll comb the core for dead code. For eg. the first
three lines of taxonomy_save_vocabulary and so.


March 28, 2005 - 17:32 : chx

Attachment: http://drupal.org/files/issues/checkboxes_0.patch (1.71 KB)

Oh NO! One strayed space! I fixed it before steven beheads me....


March 28, 2005 - 18:36 : chx

Attachment: http://drupal.org/files/issues/checkboxes_1.patch (1.64 KB)

Among other changes, I have moved the hidden field form_checkboxes[] out
of $edit. I have included HTML code, yes, but this is a very special
thing, so it does not merit changing form_input just 'cos of this. And
you won't need to theme a hidden field...

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