This example displays three user custom fields, fielda, fieldb and fieldc.  It uses the PHP function array_column() and therefore it does not need a foreach loop.

use Joomla\CMS\Factory;
use Joomla\Component\Fields\Administrator\Helper\FieldsHelper;
$customFields = FieldsHelper::getFields('com_users.user', Factory::getUser(), true);
$values = array_column($customFields, 'value', 'name');
// echo 'values = ' . print_r($values, true);
echo 'fielda = ' . $values['fielda'] . ' fieldb = ' . $values['fieldb'] . ' fieldc = ' . $values['fieldc'];

Details

Written by: Toivo Talikka

Category: Joomla

Published: 08 January 2023

Hits: 23404

You may have seen the error message "JUser: :_load: Unable to load user" and wondered if it would be possible to easily update all articles that display an error after the author or editor of the article has been deleted from the system on purpose or by accident.  The alternative, manual editing and updating each article, even though easy, can be boring and subject to mistakes, and it can take longer than expected.

If you have the numeric id of another user, who is going to replace the author or modifier of the article, the updates can be done through a SQL query.

Run the attached SQL statement first in a test environment, for example a cloned copy of  the website, hosted on your workstation, using a bundle like Wampserver from https://wampserver.com/en.  Make a backup of the content table before the test, in case something goes wrong.

The attached SQL script replaces the author of all articles created by the deleted original user, whose name and other details cannot be found from the users table in the database.  The first SQL statement sets the user id of the new author.  After that a CREATE statement creates a temporary table  so that the article ids can be stored by the subsequent query, which finds all the articles where the author has been deleted and adds the article id to a temporary table. 

The same pattern can be used to update the column 'modified_by'. Replace 'ep28r' with your own table prefix.

SET @author = 181;
DROP TEMPORARY TABLE IF EXISTS deleted_users;
CREATE TEMPORARY TABLE deleted_users (
`id` int(10) unsigned NOT NULL, PRIMARY KEY (`id`)
)
SELECT c.id FROM ep28r_content c
LEFT JOIN ep28r_users u ON c.created_by = u.id
WHERE u.id IS NULL;
UPDATE ep28r_content c SET c.created_by = @author
WHERE c.id IN(SELECT d.id FROM deleted_users d);

Details

Written by: Toivo Talikka

Category: Joomla

Published: 12 January 2020

Hits: 41747

If listing users with custom fields is a one-off requirement or only super users need to do that task from time to time, registered users and the contents of their custom fields can be listed by a custom query using phpMyAdmin or a similar MySQL client.

The following example creates temporary tables before generating the list. The query assumes that there are three custom fields, field4, field5 and field6, where the field ids are 4, 5 and 6. Replace 'epr28r' with your own table prefix.

CREATE TEMPORARY TABLE IF NOT EXISTS `ep28r_registered`
SELECT u.id, u.name, u.email FROM ep28r_users u
INNER JOIN ep28r_user_usergroup_map m ON u.id = m.user_id
WHERE m.group_id = 2 AND u.block = 0;

CREATE TEMPORARY TABLE IF NOT EXISTS `ep28r_work4`
SELECT u.id, v.value AS field4 FROM ep28r_registered r
LEFT JOIN ep28r_fields_values v ON r.id = v.item_id
INNER JOIN ep28r_fields f ON f.id = v.field_id
WHERE f.id = 4;

CREATE TEMPORARY TABLE IF NOT EXISTS `ep28r_work5`
SELECT u.id, v.value AS field5 FROM ep28r_registered r
LEFT JOIN ep28r_fields_values v ON r.id = v.item_id
INNER JOIN ep28r_fields f ON f.id = v.field_id
WHERE f.id = 5;

CREATE TEMPORARY TABLE IF NOT EXISTS `ep28r_work6`
SELECT u.id, v.value AS field6 FROM ep28r_registered r
LEFT JOIN ep28r_fields_values v ON r.id = v.item_id
INNER JOIN ep28r_fields f ON f.id = v.field_id
WHERE f.id = 6;

SELECT r.id, r.name, r.email, w4.field4, w5.field5, w6.field6 FROM `ep28r_registered` r
INNER JOIN `ep28r_work4` w4 ON r.id = w4.id
INNER JOIN `ep28r_work5` w5 ON r.id = w5.id
INNER JOIN `ep28r_work6` w6 ON r.id = w6.id;

Details

Written by: Toivo Talikka

Category: Joomla

Published: 01 January 2020

Hits: 5116