[support] Tableselect in forms issue
Metzler, David
metzlerd at evergreen.edu
Fri Sep 14 15:16:06 UTC 2012
You are struggling with some basic php concepts. I'm guessing your
$options array contains integers as the value and the 0th element of the
array is a '0'. which is the crux of the problem.
'0' > 0 will always return false.
Perhaps the comparison that you need to write write is !== 0. the
extra = sign in php comparisons means exactly equal in both type and
value. Otherwise the '0' string data gets converted to the 0 integer
before the comparison.
My point about $index vs. $key was really about your code snippet:
foreach($form_state['values']['category_boundary']['category_fieldset'][
'catg'] as $key => $value)
{
if($form_state['values']['category_boundary']['category_fieldset']['catg
'][$index] > 0)
{
//row is selected.
}
else
{
//row is not selected.
}
}
In this code "as $key => $value" means that the array index will be
placed in the variable $key, but then you're using an undefined variable
$index in the $form_state['values'] test. $index is an undefined
variable as far as I can tell, but I'm betting it get set by code that
you omitted to keep the example sanely short. Sometimes though when
people post these they just haven't noticed, so I wanted to point it
out.
In short changing y our >0 comparison to !==0 should solve the problem.
________________________________
From: support-bounces at drupal.org [mailto:support-bounces at drupal.org] On
Behalf Of Kamal Palei
Sent: Thursday, September 13, 2012 5:42 PM
To: support at drupal.org
Subject: Re: [support] Tableselect in forms issue
Hi All
Thanks a lot for the input.
I am little bit confused with $index stuff. When I add tableselect
element, I use the key
"['category_boundary']['category_fieldset']['catg']" . Somewhere deep
in form code, for every row's checkbox, what index is used by form.inc I
really do not know. So instead of $index what I should use, I am not
sure.
Tried to debug more. When I am trying to add rows (means none of the
rows were selected), if I print the array using dpm(), I get below
output.
... (Array, 4 elements)
* 0 (Integer) 0
* 1 (Integer) 0
* 2 (Integer) 0
* 3 (Integer) 0
When I am tying to delete rows (means one or more rows were selected, in
this particular case I had selected rows 2, 3 and 4), if I print the
array
$form_state['values']['category_boundary']['category_fieldset']['catg']
using dpm(), I get below output,
... (Array, 4 elements)
* 1 (String, 1 characters ) 1
* 2 (String, 1 characters ) 2
* 3 (String, 1 characters ) 3
* 0 (Integer) 0
Thats the reason, thought of taking $index as key where $index can be
one of 0,1,2,3.
Using the logic mentioned in my first email, I will be able to delete
the rows 2, 3 and 4.
But the problem is if I try to delete the 1st row it does not get
deleted. I tried to print the array, it looks as below.
... (Array, 4 elements)
* 0 (String, 1 characters ) 0
* 1 (Integer) 0
* 2 (Integer) 0
* 3 (Integer) 0
Since irrespective of fact, 0th row is selected or not, always value is
0. Thats the reason, why logic
(if($form_state['values']['category_boundary']['category_fieldset']['cat
g'][$index] > 0) ) does not work.
But from above prints, one thing is clear while I have selected 0th row,
0th element is
0 (String, 1 characters ) 0 and when 0th row is not selected, it looks
as 0 (Integer) 0 , (please note the difference here) hence, there
should be someway to determine if 0th row is selected or not. I am not a
PHP expert , so probably missing something here.
Can somebody kindly help here, how do I determine if the 0th row is
selected or not.
Best Regards
Kamal
Net Cloud Systems, Bangalore
On Thu, Sep 13, 2012 at 11:35 PM, Metzler, David
<metzlerd at evergreen.edu> wrote:
Wow I can't believe I didn't catch that either. Good eye!
________________________________
From: support-bounces at drupal.org [mailto:support-bounces at drupal.org] On
Behalf Of Anthony
Sent: Thursday, September 13, 2012 10:01 AM
To: support at drupal.org
Subject: Re: [support] Tableselect in forms issue
Shouldn't it be greater equal zero to get the first element?
On Thu, Sep 13, 2012 at 8:13 AM, Metzler, David <metzlerd at evergreen.edu>
wrote:
Seems like it should work provided you really meant $index to be $key.
That's not in your real code, right? If it is in your cod that way,
that's the bug.
________________________________
From: support-bounces at drupal.org [mailto:support-bounces at drupal.org] On
Behalf Of Kamal Palei
Sent: Thursday, September 13, 2012 5:32 AM
To: support at drupal.org
Subject: [support] Tableselect in forms issue
Hi All
I am trying to use tableselect in forms as per below code.
$form['category_boundary']['category_fieldset']['catg'] = array
(
'#type' => 'tableselect',
'#header' => $header,
'#options' => $options,
'#multiple' => TRUE,
'#js_select' => FALSE,
);
By manipulating options array, I can add the rows in forms table.
Sometimes I need to remove the selected rows from form table.
My question is, how can I determine if a particular row is selected.
Currently using below code to determine which row is selected.
foreach($form_state['values']['category_boundary']['category_fieldset'][
'catg'] as $key => $value)
{
if($form_state['values']['category_boundary']['category_fieldset']['catg
'][$index] > 0)
{
//row is selected.
}
else
{
//row is not selected.
}
}
I can determine all the rows if those are selected or not except the 0th
row.
Can somebody tell me, what is the RIGHT way to determine if a particular
row in a table is selected or not.
Best Regards
Kamal
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