How to Work with Pseudo-fields in Drupal 7
https://www.zyxware.com/sites/default/files/styles/user_image/public/pictures/zyxlogo.png?itok=J9t-ZEoU
BY webmaster
1 year ago
Drupal-Technical
0 comments comment

What are pseudo-fields?

Pseudo field is a field that you can add to any content entity type. For example, you can add a pseudo-field to nodes, taxonomy terms, users, paragraphs, etc. You can hide this field in the UI, but you cannot change it's value, because the content of this field is generated via the code.

How to manage Pseudo fields?

You're already familiar with the "Manage Fields" and "Manage Display" options provided in Structure > Content Types under the Drupal Admin part of a site. Manage Fields allows you to define Fields and order them by how they should appear in an edit or create form, while Manage Display allows you to order the fields per view mode, like Teaser or Full page view.

But you may have also noticed some non-editable fields appear in Manage Display such as the node title or URL redirects. Content editors can hide or show this field in display settings of the entity, but the value of this field can’t be changed from the user interface. This type of field is called ‘Pseudo Field’.

Scope of this field

This is useful for modules that manage their own data attached to an entity or if you want to expose another modules property via Fields UI. These pseudo fields are typically used to expose entity properties that are not managed by "Manage Fields". So, by using pseudo fields, you get all the benefits that other fields created from the UI have, like drag and drop functionality to control visibility and position, but at the same time you can dynamically generate its content.

Pseudo field's value can be any renderable array, means that you can return whatever you want like view, form, block or even another entity.

Implementation

To attach a pseudo field, you need to implement only two hooks. The following is a simple example showing how to add an extra field to the Field UI and provides an example of one way of inserting the field onto a node.


/**
 * Implements hook_field_extra_fields().
 */
function example_field_extra_fields() {
  $extra['node']['article']['display']['field_extra_field'] = array(
    'label' => t('Pseudo field label'),
    'description' => t(‘Pseudo field description.'),
    'weight' => 0,
  );
  return $extra;
}

/**
 * Implements hook_node_view().
 */
function example_node_view($node, $view_mode, $langcode) {
  if ($view_mode === 'full' && $node->type === 'article') {
    $node->content['field_extra_field'] = array(
     '#markup' => '<p> This is inserted unless hidden in the field UI.</p>’,
    );
  }
}

Here I attached a pseudo field named 'field_extra_field' to the Article entity and you can test this easily. Just paste the code in your .module file, flush all caches and go to the following page: "admin/structure/types/manage/article/display" where you can see your new field.


RELATED ARTICLE

/themes/custom/zyxpro_light/images/placeholder.png
close

on 01st January 2008 / by webmaster
We have added a few new modules to our site recently. Drupal Technical StumbleThis Leave a reply Your email address will not be published. Required fields are marked * Sean (not verified) access_time 25 Nov 2020 - 03:15 Hi there, I uploaded the files, enabled the modules to use SU, and now I see the link, but there is no icon... How can I fix this? Thanks, Sean webmaster access_time 25 Nov 2020 - 03:15 In reply to Icon doesn&#039;t show by Sean (not verified) What do you see when you view the source? Search for stumblethis_button and you should be able to see the code for the image and the URL. Then you should be able to troubleshoot from there. Juicy Couture Addict (not verified) access_time 25 Nov 2020 - 03:15 thanks for the post. would love to hear more of you. by the way, drupal's really popular nowadays as it has easy and fast features. you agree with me? thanks. Add new comment
/themes/custom/zyxpro_light/images/placeholder.png
close

on 16th January 2008 / by webmaster
Most webmasters do not realize this, but a lot of the content on lot of websites can be accessed from multiple URLs. A simple example would be where www.example.com and example.com leads to the same page. This is a fatal mistake in Search Engine Optimization and search engines penalize you for duplicate content. The correct configuration would be where the above two urls will lead you to the same page but example.com will redirect you to www.example.com with a 301 (Moved permanently) status which will not result in search engines penalizing the page. It is very easy to configure 301 redirects using Apache .htaccess file and the process is the same for a Drupal installation also. Drupal Technical Apache htaccess SEO Leave a reply Your email address will not be published. Required fields are marked * Anonymous (not verified) access_time 25 Nov 2020 - 03:15 Hello. I'm trying to make example.com show as www.example.com, and I'm running into difficulties. I'm on Apache 2.0 and using the following lines in my httpd.conf file: RewriteEngine on RewriteCond %{HTTP_HOST} ^xxxxxxxxxx\.com$ [NC] RewriteRule ^(.*)$ http://www.xxxxxxxxxx.com/$1 [L,R=301] When I go to http://xxxxxxxxxx.com, I get http://www.xxxxxxxxxx.com (as expected). However, when I go to http://xxxxxxxxxx.com/node/1 (it's a Drupal site), I get a 404 thrown and the URL changes to xxxxxxxxxx.com/var/www/drupal/node/1. Same thing with www.xxxxxxxxxx.com/node/1. Any suggestions? I want to run without Drupal's .htaccess file (instead incorporating these calls into my httpd.conf file). webmaster access_time 25 Nov 2020 - 03:15 In reply to Rewrite including filesystem path by Anonymous (not verified) I think the problem is with the base path which results in the redirection to /var/www/ part. The best approach I would think is to start with drupal htaccess and then strip out parts and move to httpd SNVC (not verified) access_time 25 Nov 2020 - 03:15 This is definitely a good guide. Thanks for this. wellyson access_time 25 Nov 2020 - 03:15 This is really nice and helpful. Add new comment
/themes/custom/zyxpro_light/images/placeholder.png
close

on 08th February 2008 / by webmaster
Attachment Size slashdotit.tar.gz 173.55 KB Similar to the StumbleThis module that we had created earlier we have created another bookmarking Drupal Technical Slashdotit Leave a reply Your email address will not be published. Required fields are marked * Shlomi Fish (not verified) access_time 25 Nov 2020 - 03:15 Hi! I'm interested in this module, but Drupal 6.2 complains that it's incompatible with it. Can you please update it or tell me how? Regards, Shlomi Fish shlomifish.org webmaster access_time 25 Nov 2020 - 03:15 In reply to Can you update it for Drupal-6.x? by Shlomi Fish (not verified) Sure we are working on this currently and will post an update soon. Also we will post this module on www.drupal.org as well Cheers Anoop John Team Zyxware Anonymous (not verified) access_time 25 Nov 2020 - 03:15 Hello! Nice Article very interesting, thanks Add new comment
Leave a reply
Your email address will not be published. Required fields are marked *

Filtered HTML

  • Web page addresses and email addresses turn into links automatically.
  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <blockquote cite> <code> <ul type> <ol start type='1 A I'> <li> <dl> <dt> <dd> <h2 id='jump-*'> <h3 id> <h4 id> <h5 id> <h6 id>
  • Lines and paragraphs break automatically.
The content of this field is kept private and will not be shown publicly.
CAPTCHA This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.