[development] Creating multiple login blocks with, different validation rules.

[Alex Bronstein]

 > and if I do a form_set_error(), because the elements are the same 
name the red error border appears on both, but hey I can live with that.

For anyone what can't live with that, you may be interested in 
http://drupal.org/node/799356.


Anth wrote:
> Hi,
>
> Thanks for the tips everyone. Worked it out, will describe what I 
> ended up doing in case it's useful to anyone.
>
> Nancy and Earnie, I was using MultiBlock and the core of the problem 
> for me was that they *don't* change the $form_id so there is nothing 
> to differentiate them. Alex, yep, I'd started to look at hook_forms so 
> your tip was a good kick in the right direction. Lee, by the time I 
> got your email I'd worked it out :)
>
> So as an example, I had to throw away MultiBlock and generate the 
> blocks on my own but it was pretty easy to do. My application is a 
> timesheet application and there is a role called 'candidate' that 
> needed a separate login. The only real problems I had after getting 
> the hang of all that is for some reason I had to shift my validation 
> function into the first slot (see comments in hook_form_alter) to get 
> it to fire, and if I do a form_set_error(), because the elements are 
> the same name the red error border appears on both, but hey I can live 
> with that.
>
> in my hook_block:
>
> case 'view':
> $block['subject'] = 'Candidate Login';
> $block['content'] = drupal_get_form('candidate_login_block');
> return $block;
>
> Now because 'candidate_login_block' doesn't exist as a function that 
> can be called by drupal_get_form I want drupal_get_form to be called 
> as drupal_get_form('user_login_block') and to make this happen I set 
> up a hook_forms (note, not hook_form) as below:
>
> function timesheet_forms($form_id, $args) {
> $forms['candidate_login_block']['callback'] = 'user_login_block';
> return $forms;
> }
>
> This all means that in my hook_form_alter I can do:
>
> switch($form_id) {
> case 'candidate_login_block':
> // $form['#validate'][] = '_timesheet_candidate_login_validate';
> // The line above doesn't seem to result in my validation function 
> getting called so had to use the form below.
> array_unshift($form['#validate'], '_timesheet_candidate_login_validate');
> break;
>
> In my function _timesheet_candidate_login_validate I can do whatever I 
> want to invalidate the form (I called user_load with the entered field 
> and checked its roles). Done.
>
> Thanks,
> Anthony.
>
> On 14/05/2010 3:37 PM, Lee Rowlands wrote:
>>
>> For a decent Hook_forms example look to ubercart’s uc_product, it 
>> uses hook_forms to register the ‘add to cart’ forms : 
>> http://api.lullabot.com/uc_product_forms
>>
>> *>* I think the answer about using hook_forms is the way to go, but 
>> last I looked the API docs were really bad on that hook.
>>