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+--- Thread: Form_validation confirm one of two items completed (/showthread.php?tid=29031)
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Form_validation confirm one of two items completed - El Forum - 03-28-2010
[eluser]gscharlemann[/eluser]
Hi
I'm not sure how to accomplish the following with form_validation. I have two fields, the first is a text field called new_type the second field is a drop down called existing_type.
here's the view:
Code:
...
<input type="text" name="new_type" value="" /><br/>
<select name="existing_type">
<option value="new">New Type</option>
<option value="type1">Type 1</option>
...
</select>The rules are: if new_type is empty then something other than the option "new" must be selected in the "existing_type" dropdown (otherwise the form throws an error). And vice versa - If "new_type" is not empty and something other than "new" is selected in the "existing_type" dropdown, the form throws an error.
I don't need to check a DB to do this validation, just need to compare the two inputs. Is there a way to do this with form_validation class?
Thanks for any help.
Form_validation confirm one of two items completed - El Forum - 03-28-2010
[eluser]Tominator[/eluser]
I think this is absolutly simple:
Code:
if( !Empty($this->input->post('new_type')) && Empty($this->input->post('existing_type')) )
{
correct
}
elseif( Empty($this->input->post('new_type')) && !Empty($this->input->post('existing_type')) )
{
correct
}
else
{
incorrect
}Form_validation confirm one of two items completed - El Forum - 03-28-2010
[eluser]gscharlemann[/eluser]
I can do it that way, but I was hoping to leverage the form_validation class:
Code:
$this->form_validation->set_rules('new_type', 'New Type', 'xss_clean');
$this->form_validation->set_rules('existing_type', 'Existing Type', 'if_empty_new_type_required|xss_clean');Make sense?
Form_validation confirm one of two items completed - El Forum - 03-28-2010
[eluser]Tominator[/eluser]
Oh, I see. I'm very sorry. It's my mistake, because I am not very well on form_validation class and I was thinking, that you want "basic" answer.
I am going to learn it
Form_validation confirm one of two items completed - El Forum - 03-28-2010
[eluser]flaky[/eluser]
create a callback function (read the user guide)
Code:
public function if_empty_new_type_required(){
if( !Empty($this->input->post('new_type')) && Empty($this->input->post('existing_type')) )
{
return true;
}
elseif( Empty($this->input->post('new_type')) && !Empty($this->input->post('existing_type')) )
{
return true;
}
else
{
//set here the error message
return false;
}
}then in the set_rules section
Code:
$this->form_validation->set_rules('new_type', 'New Type', 'xss_clean');
$this->form_validation->set_rules('existing_type', 'Existing Type', 'if_empty_new_type_required_callback|xss_clean');Form_validation confirm one of two items completed - El Forum - 03-28-2010
[eluser]gscharlemann[/eluser]
Thanks flaky
Where does the callback function usually go? In the controller that is processing the form or elsewhere?
Form_validation confirm one of two items completed - El Forum - 03-28-2010
[eluser]theshiftexchange[/eluser]
[quote author="gscharlemann" date="1269836674"]Thanks flaky
Where does the callback function usually go? In the controller that is processing the form or elsewhere?[/quote]
In the controller where you are doing the form processing
Form_validation confirm one of two items completed - El Forum - 03-28-2010
[eluser]gscharlemann[/eluser]
I added a callback
Code:
$this->form_validation->set_rules('new_type', 'New Type', 'validate_existing_or_new_callback|xss_clean');
$this->form_validation->set_rules('existing_type', 'Existing Type', 'xss_clean');Code:
public function validate_existing_or_new()
{
if(!empty($this->input->post('new_type')) AND empty($this->input->post('existing_type')))
{
return TRUE;
}
else if(empty($this->input->post('new_type')) AND !empty($this->input->post('existing_type')))
{
return TRUE;
}
else
{
$this->form_validation->set_message('validate_existing_or_new', 'Choose new or existing, not both.');
return FALSE;
}
}I'm getting the following error:
Can't use method return value in write context
and it refers to this line:
Code:
if(!empty($this->input->post('new_type')) AND empty($this->input->post('existing_type')))Any ideas? Thanks
Form_validation confirm one of two items completed - El Forum - 03-28-2010
[eluser]suba[/eluser]
Hi,
$this->form_validation->set_rules('new_type', 'New Type', 'callback_check_old|xss_clean');
$this->form_validation->set_rules('existing_type', 'Existing Type', 'callback_check_new|xss_clean');
You must uses callback_ as a prefix of function name.
then
function check_old()
{
statement.........
}
function check_new()
{
statement..........
}
In function don't use callback_ name.
Those validation function , you can use in controller.
Form_validation confirm one of two items completed - El Forum - 03-29-2010
[eluser]flaky[/eluser]
sorry for my little typo
