Undefined index: 0 in user_node_load() ...

By GhosThit on 10 Jan 2013 at 18:22 UTC

Greetings,
I am getting this Error message on only one of my Drupal 7.18 pages.

Error

    Notice: Undefined index: 0 in user_node_load() (line 3586 of /brain/modules/user/user.module).
    Notice: Trying to get property of non-object in user_node_load() (line 3586 of /brain/modules/user/user.module).
    Notice: Undefined index: 0 in user_node_load() (line 3587 of /brain/modules/user/user.module).
    Notice: Trying to get property of non-object in user_node_load() (line 3587 of /brain/modules/user/user.module).
    Notice: Undefined index: 0 in user_node_load() (line 3588 of /brain/modules/user/user.module).
    Notice: Trying to get property of non-object in user_node_load() (line 3588 of /brain/modules/user/user.module).

I look into user.module to reference line # 3586, 3587 and 3588 but am not really great at reading the code and understanding what to do next.

user.module

3571 	/**
3572 * Implements hook_node_load().
3573 */
3574 function user_node_load($nodes, $types) {
3575   // Build an array of all uids for node authors, keyed by nid.
3576   $uids = array();
3577   foreach ($nodes as $nid => $node) {
3578     $uids[$nid] = $node->uid;
3579   }
3580 
3581    // Fetch name, picture, and data for these users.
3582   $user_fields = db_query("SELECT uid, name, picture, data FROM {users} WHERE uid IN (:uids)", array(':uids' => $uids))->fetchAllAssoc('uid');
3583 
3584   // Add these values back into the node objects.
3585   foreach ($uids as $nid => $uid) {
3586     $nodes[$nid]->name = $user_fields[$uid]->name;
3587     $nodes[$nid]->picture = $user_fields[$uid]->picture;
3588     $nodes[$nid]->data = $user_fields[$uid]->data;
3589   }
3590  }

Any tips on troubleshooting this would be greatly appreciated.
Thanks

Comments

=-=

VM commented 10 January 2013 at 18:46

you're getting it on only 1 of your drupal pages. which page? does it have any custom php code? what version of php is in use?

Has the site ever been updated? did you run update.php?

in the user table of the database do you have user 0?

I have a similar

galch24 commented 16 January 2013 at 05:16

I have a similar problem.

PHP 5.3.3-7+squeeze14
Drupal 7.18
views 7.x-3.5

The problem appeared on the output views page. That views display does not contain php code. It is a simple table with fields of the nodes, filter by node type.
Also that problem appeared on the admin/content page.

There is the text of the alarm messages:

Notice: Undefined index: 0 in function user_node_load() (line 3586 in file /modules/user/user.module).
Notice: Trying to get property of non-object in function user_node_load() (line 3586 in file /modules/user/user.module).
Notice: Undefined index: 0 in function user_node_load() (line 3587 in file /modules/user/user.module).
Notice: Trying to get property of non-object in function user_node_load() (line 3587 in file /modules/user/user.module).
Notice: Undefined index: 0 in function user_node_load() (line 3588 in file /modules/user/user.module).
Notice: Trying to get property of non-object in function user_node_load() (line 3588 in file /modules/user/user.module).
Notice: Undefined index: 0 in function user_node_load() (line 3586 in file /modules/user/user.module).
Notice: Trying to get property of non-object in function user_node_load() (line 3586 in file /modules/user/user.module).
Notice: Undefined index: 0 in function user_node_load() (line 3587 in file /modules/user/user.module).
Notice: Trying to get property of non-object in function user_node_load() (line 3587 in file /modules/user/user.module).
Notice: Undefined index: 0 in function user_node_load() (line 3588 in file /modules/user/user.module).
Notice: Trying to get property of non-object in function user_node_load() (line 3588 in file /modules/user/user.module).

...

=-=

VM commented 16 January 2013 at 12:29

the questions in http://drupal.org/node/1885428#comment-6925404 still apply

Resolved

GhosThit commented 18 January 2013 at 17:33

For now this issue has been resolved for me. The node the page was coming up on was a test-node anyway, so I just scrapped the node and created a new one. The error was also coming up on any 'Edit User Profile' page but is not anymore so.. o_O I dunno.

Missing user 0

albertomota commented 4 June 2014 at 23:46

Just for future reference, Drupal seems to need to have a user with ID 0 on the database; I had accidentally removed it and got these error messages.

Once I added the user back again the messages were gone.

Missing user 0 - Thank you, worked!

Mugé commented 20 April 2017 at 14:00

Worked like a charm. I had no password for the user, so I deleted it. The long pink Error gives me the creeps with Drupal each and every time.

I recreated a user through admin panel
> People > Add User.
> Went into phpMyAdmin through the host
> Changed the created users ID to 0 (zero)
> Worked

Thank you very much for your help.

Worked for me as well

YuvalBH commented 11 July 2017 at 10:40

what a silly bug...why they don't solve it ??

I know this is an old issue, but found a solution

4paws commented 19 April 2016 at 20:17

This happened when I exported my content to another installation (using the module "Data export import") and viewed the content - the new install was looking for the same user id that created the content on the original site. I added a new user and changed the id to the same number (in my case it was "Notice: Undefined index: 10 in user_node_load..."), and it worked.

i'll need to work with our database manager for that

are you saying that i/we...

1. login to linux/ubuntu/MySql

2. access the respective site

3. access the users table

4. take a look - if there is no user 0, thats most likely the problem

Then what? manual add a user 0 to the table, which must be done with cmd line commands

and will it say anonymous in the user table (i doubt it)

=-=

VM commented 11 November 2022 at 14:11

no idea if its 'most lilkey' your problem. Just know the UID 0 should be in the user table. Suggest reviewing an install without the issue and compare.