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A fatal error without any of your code in the backtrace: check your form_alter

Fatal error: Cannot use string offset as an array in /home/ben/code/pdonline/drupal/includes/ on line 976
Call Stack
# Time Memory Function Location
1 0.0019 64260 {main}( ) ../index.php:0
2 2.7990 23389320 menu_execute_active_handler( ) ../index.php:18
3 2.8490 23579028 call_user_func_array ( ) ../
4 2.8490 23579192 node_add( ) ../
5 2.8490 23580296 drupal_get_form( ) ../
6 3.3649 29258140 drupal_process_form( ) ../
7 3.3649 29261700 form_builder( ) ../
8 3.4317 29930884 form_builder( ) ../
9 3.4397 29985960 form_builder( ) ../
10 3.4399 29986204 form_builder( ) ../
11 3.4400 29986712 form_builder( ) ../
12 3.4401 29988276 form_builder( ) ../
13 3.4402 29988988 _form_builder_handle_input_element( ) ../

I managed to cause this in an implementation of hook_form_alter (not in any of the files listed in the backtrace) simply by using an array path that doesn't exist.

$form['field_author']['widget']['default_value'][0]['uid'] = $user->uid;

Needed another zero. (Well, the whole path was whack. The below does work, and in a an appropriate hook_form_alter will automatically set the Agaric made a module out of this– a bit overkill, and assuming any time a userreference field is named "author" it should default to the current user as an author.)

$form['field_author'][0]['#default_value']['uid'] = $user->uid;

Don't know if it will ever be committed, but if you want it ask for the author_field module! We'll know you read past a giant error message to find out about it.


Searched words: 
bad array in form alter causes error deep in Drupal form code field_author make current visitor username the pre-fill in userreference field used for authors


Can get a similar error

forgetting to put # in your element definitions.

    $form['agaricexample'] = array(
      '#type' => 'markup',
      '#value' => t('Nothing much to say'),

It's leaving out the pound symbol before type or value that will cause the errors.

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