form-validation depending on a checkbox

sl3dg3hamm3r

Posted: 04 July 2009 11:27 AM

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Lab Assistant

Total Posts: 263

Joined 07-31-2008

hey there

I’m stuck with a common problem, I guess…

I have a form, where a user needs to select from certain drop-downs. Nothing fancy so far, simple form-validation.
Additionally, I have a checkbox, from which further form-validation would depend. E.g. “alternative delivery address” - if checked, the following fields are mandatory, if not, then not.

I couldn’t come up with a smart solution so far. The only thing I can think of is for each address-field (name, street, city…) to define a callback. In each callback, I would check if the checkbox is marked, and then do the rest of the check.
This would result in many small callbacks, not so nice I’d say… could somebody think of a smarter solution?

Thx for any tipps!
Oliver

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Haloperidol

Posted: 04 July 2009 03:21 PM

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Total Posts: 18

Joined 07-03-2009

maybe:

...
   // all the validations you want to run by default
   $this->form_validation->set_rules('email', 'E-mail', 'trim|required|valid_email');

   if (isset($this->input->post('checkbox_name')) && $this->input->post('checkbox_name') == 'on')
   {
      $this->form_validation->set_rules('other_variables', 'blablabla', 'trim|required');
   }

   if ($this->form_validation->run() === TRUE) {
... 

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sl3dg3hamm3r

Posted: 05 July 2009 05:04 AM

[ Ignore ] [ # 2 ]

Lab Assistant

Total Posts: 263

Joined 07-31-2008

I do store the rules in rule-groups in an external file, therefore I call them like


if ($this->form_validation->run('signup') == FALSE) { ...

Unfortunately, I can’t chain/cascade different groups according to the manual I think, which would come real handy in here. Would be nice as an additional feature…

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Haloperidol

Posted: 05 July 2009 11:38 PM

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Summer Student

Total Posts: 18

Joined 07-03-2009

then maybe

if (isset($this->input->post('checkbox_name')) && $this->input->post('checkbox_name') == 'on')
   {
      if ($this->form_validation->run('validation_if_checkbox_is_off') == FALSE || $this->form_validation->run('rest_of_validation_if_checkbox_is_on') == FALSE)
      { 
         ...
      }
   } else {
      if ($this->form_validation->run('validation_if_checkbox_is_off') == FALSE)
      { 
         ...
      }
   } 

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sl3dg3hamm3r

Posted: 06 July 2009 02:25 AM

[ Ignore ] [ # 4 ]

Lab Assistant

Total Posts: 263

Joined 07-31-2008

yeah, this would work. it results in redundant rules in the external file, though. But might be still better than many small callbacks, I guess…

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