User can't register more than once?

This is uncanny, I came here to post the same issue, I can confirm bug exists.

Further the following option is checked off for the product:

"If selected, users can register for more than one slot for this event."

I'm interested in this as well. Also wondering if 1 person registers a team, could they have some sort of control over the accounts they purchased?

This is sort of similar to a problem I have had... parents registering their children for activities at an event. For this, I made the children's names and other details subforms of the registration, which worked, but then each registration counted as one slot and it made some aspects of rendering the result difficult.

It would be nice to track using the slot system the children (but not the parent): in my case all children are separate, not "bundled", and parents don't count: they don't attend and are only involved as guardians.

@rivimey: did that result in accounts for each of the children? And did the parent, as the buyer, have access to those accounts?

@arphanus: as people were registering without having to create Drupal accounts, they were doing do anonymously as far as registration was concerned, and consequently for privacy's sake, nobody but the site owners could see the details. The reg form was filled in by the parent and the children's names were added as data.

I would have preferred a "sleeker" solution but am not even sure what it would look like. The thing I didn't want was to have to create a whole load of account registrations before starting, which would have presented a user-barrier to a largely non-tech audience.

I would agree with comment #6 conclusion.

Exact same problem here. Either the system should accept multiple registrations for each event (the options in the registration settings seem to suggest that this should already be possible), or it should show an error message telling they can't register more than once. It definitely shouldn't end with a fatal error!

Personally, I can't see any good reason why the table needs rows to be unique in the way thats its set up now.

Temporary workaround to redirect users to update their existing registration if it already exists.

modulename_init() {

  global $user;

  // Redirect users from node/%/register to register/%/edit
  if ($user->uid && arg(2) == 'register' && arg(0) == 'node') {
    $nid = arg(1);
    $node = node_load(arg(1));
    if ($node && $node->field_registration['und'][0]['registration_type'] == 'volunteer') {

      $registrations = registration_load_multiple(false, array('type' => 'volunteer', 'author_uid' => $user->uid, 'user_uid' => $user->uid, 'entity_id' => $nid));

      foreach ($registrations as $key => $registration) {
        if ($registration->registration_id > 0) {
          drupal_set_message(t('You are already registered.  You may update your registration below.'));
          header("Location: /registration/" . $registration->registration_id . '/edit?destination=node/'.$nid);
          exit();
        }
      } 
    }
  }
  // End register redirect

}

This is crossing paths with #1881212: registration_is_registered() should be smart about registration states

The unique constraint on user registrations was removed in 521e1b99c82596857b97b241855e919ac490103a. We also altered how registration_is_registered() works as discussed in #1881212: registration_is_registered() should be smart about registration states.

Still getting
Email addresses must be unique for each registrant. Error
I updated today to the latest release. I did not test the dev version since it is only one day newer than the stable release.

I just realized this was posted to the dev version so I upgraded, I'm still getting the error.

I also received the following error the first attempt at updating:

An AJAX HTTP error occurred. HTTP Result Code: 200 Debugging information follows. Path: http://worcesterfencing.com/update.php?op=selection&token=XMQseioTigJFhN... StatusText: OK ResponseText: Fatal error: require_once() [function.require]: Failed opening required '/home/worfence/public_html/sites/all/modules/registration/includes/registration.entity.inc' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/worfence/public_html/includes/bootstrap.inc on line 3088

I have just upgraded the latest release of this module and am now getting this error when I checkout and am presented with the registration forms.

You cannot register yourself for the same item more than once.
Notice: Undefined property: Registration::$mail in commerce_registration_information_checkout_form() (line 74 of /var/www/vhosts/arduino-mega.com/simoncarr.co.uk/srrotary/sites/all/modules/commerce_registration/includes/commerce_registration.checkout_pane.inc).
Notice: Undefined property: Registration::$mail in commerce_registration_information_checkout_form() (line 74 of /var/www/vhosts/arduino-mega.com/simoncarr.co.uk/srrotary/sites/all/modules/commerce_registration/includes/commerce_registration.checkout_pane.inc).

As you can see as well as the error I still get the "You cannot register yourself for the same item more than once." error. I have also carried out the instruction in #2 (removed the unique index of entity_id_entity_type_user).

I have to go live with this site at the end of February so any help is much appreciated.

Just to let you know that I also got an error when upgrading the registration module which prevented update.php from running. I ran manually afterwards and that sorted out the problem.

User can't register more than once? is still a problem however. I am not sure from reading the above posts if this issue has been fixed or not?

Could someone clarify what I need to do fix the error.

Thanks

Just reading the above posts again and it looks as though the developers are trying the fix the problem that once a user has registered for an event once that they should then be able to register again at a later date.

My problem however is
That if I add 3 registrations to the cart and then checkout, I am presented with 3 registration forms as I would expect. If I choose Myself in more than one of them I get the User can't register more than once error. If I try to register for another person and use the same email address more than once I get the Duplicate email address error.

Can you confirm if there is a fix available this issue?

Do I delete this completely or just change it from Unique to Index?

Could someone tell me which file holds the code that prevents the same user registering twice. I have now upgraded to the Dev version and deleted the unique index as described in #2 but I still cant regisetr the same person twice.

My plan is patch the code myself and see if I can get this working.

Thanks
Simon

I believe all the issues posted after #11 are related to Commerce Registration. This is an entirely different project with different maintainers, so please discuss related issues there. This thread is solely about changes to Entity Registration allowing the same user to register more than once, which, from everything we can tell, now works as designed.

I believe there is still an issue with this. Whilst the unique constraint has been removed, the registration_access_people() function still checks to ensure that a user is not already registered when determining if they have the permission to register for an event. The attached patch updates this so that it considered the ' Allow multiple registrations' option when determining wether to restrict based on wether the user is registered or not.

The multiple_registrations setting is currently intended to allow a user to register for multiple slots with one registration. Probably makes sense to not mix that logic with the ability to create multiple registrations.

Could be split out into two settings - allow user to register for multiple slots and allow user to create multiple registrations.

Updated patch introduces a new setting to allow users to register for a particular more than once.

mrfelton,
tried your patch. Thanks.
I can see the tab for registering again now. But when I try to register again I get the message "You are already registered for this event."
Tried all combinations in register-settings of the entity...

Btw: as user 1 I never had restrictions in registering more than once.

mrfelton,
Same here I tried your patch, I get the extra option but when I try to register twice for an event I get an error message.
Is there something else I have to do in order to make this work, maybe I missed something.
Thanks for any support on this, if I can help let me know.

Missed one bit. Patch updated. Note that if you are using this in conjunction with commerce registration, you need to patch that too as it does its own checks to see if a user is already registered. See #1974546: User can't register more than once for corresponding patch,

Thanks mrfelton, it´s working now.
I´m actually not using commerce registration but intend to soon.

Again thanks!

Thank you for this. Tested and I hope it gets in.

A variation of the patch from #29 committed in f7054046499cf0e5f86481e4bf1ddb69327d9051. Thanks!