Is it possible to update an entry’s Users field from the front-end? If so, how would you go about it?

The situation is this: training events are created and then posted for members to bid on for a limited number of spots. Logged in members review the available events and add their name (would use their ID) to each event of interest. Admins then manually chose a select few from all submissions.

I know I can do this by adding their IDs to a text field in the event section, and then using Split to create an array, but the Users field approach is much more elegant and offers more flexibility.

1 Answer 1


You would need to do this with a plugin that provides a custom controller, which looks at the post data and modifies the entries’ Users fields accordingly.

The controller action would look something like this:


$entryIds = craft()->request->getPost('entries');

if ($entryIds && is_array($entryIds))
    // Get the current user's ID
    $currentUserId = craft()->userSession->getUser()->id;

    // Fetch the entries
    $criteria = craft()->elements->getCriteria(ElementType::Entry);
    $criteria->id = $entryIds;
    $entries = $criteria->find();

    foreach ($entries as $entry)
        // Update the Users field value with the current user's ID
        $userIds = $entry->myUsersField->ids();
        $userIds[] = $currentUserId;

            'myUsersField' => $userIds;

  • Thanks for the reply, Brandon. What I meant was a "Users field type", not a field in a user's profile. What I am trying to do is update a Users field in a channel entry, with a front end form that would add a logged in user's ID to a specific channel entry, via a Users field.
    – Roi Agneta
    Commented Apr 4, 2016 at 15:09
  • @RoiAgneta Ah sorry, misunderstood. I just updated my answer :) Commented Apr 4, 2016 at 23:00

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