Problem/Motivation
Generically, the issue seems to be no graceful failure when form builder expects an array and gets a string.
Steps to Reproduce: method 1
- Create a page view for Content with url: /test-filter-grouped-id
- Add a Content ID filter
- Select Expose this filter to visitors, to allow them to change it
- Select Grouped filters, see my
screenshot →
- Select Allow multiple selections
- In the group table, add Group 1 is equal to 1
- In the group table, add Group 2 is equal to 2
- In the group table, add Group 3 is equal to 3
- Save view
- Goto page /test-filter-grouped-id?nid=1 the issue will happen
Steps to Reproduce: method 2
- Create a view.
- Add a filter (e.g. a taxonomy with filter identifier "tid"), make it exposed; configure the filter to "Allow multiple selections"
- Make a page display (e.g. "/test_view") to allow easy access to the filter query params. Save and navigate to the page.
- Use the exposed filter and note that the URL becomes something like "test_view?tid[N]=N" where N is the id of your taxonomy term.
- Change the query parameter to be something like "?tid=foo".
Note that you get a fatal error ""
This error is identical to that mentioned in , summarized here:
When Layout builder is active and I try to save a Content type "The website encountered an unexpected error. Please try again later." turns up and I have the below errors. What could this be?
PHP 7.2.13-1+0~20181207100540.13+stretch~1.gbpf57305
DB 5.5.5-10.1.37-MariaDB-0+deb9u1
Error: Cannot create references to/from string offsets i Drupal\Component\Utility\NestedArray::setValue() (rad 155 av /web/core/lib/Drupal/Component/Utility/NestedArray.php)... [rest of stack trace omitted]
Note that the patches offered below (with the exception of the debug patch) are essentially identical and differ only in the line number in core/lib/Drupal/Core/Form/FormBuilder.php where the change is applied.
The patch has worked for me (D9.5.9, PHP8.1) with custom views - again, with a different line number.
Proposed resolution
Modify core/lib/Drupal/Core/Form/FormBuilder.php:1242
Before:
NestedArray::setValue($form_state->getUserInput(), $element['#parents'], NULL);
After:
NestedArray::setValue($form_state->getUserInput(), $element['#parents'], NULL, TRUE);
Modify core/modules/views/src/Plugin/views/filter/NumericFilter.php:448
Before:
case 1:
if ($value['value'] === '') {
return FALSE;
}
After:
case 1:
if (isset($value['value']) && $value['value'] === '') {
return FALSE;
}