Issue: Cannot use a scalar value as an array

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September 3, 2016 9:48 PM

Alfa1

Distinguished Member

Cannot use a scalar value as an array

XF forum fails:

Code:

An exception occurred: Cannot use a scalar value as an array in /vault/core/model/permissions/vw.php on line 678
1.	XenForo_Application::handlePhpError() in /vault/core/model/permissions/vw.php at line 678
2.	vw_Permissions_Model->process_flatten() in /vault/core/model/permissions/vw.php at line 406
3.	vw_Permissions_Model->process() in /vault/core/model/permissions/vw.php at line 137
4.	vw_Permissions_Model->get() in /vault/core/model/ui/tab/area/vw.php at line 30
5.	vw_UI_Tab_Area_Model->can_main_tab() in /vault/core/model/ui/tab/vw.php at line 58
6.	vw_UI_Tab_Model->check() in /vault/core/model/area/vw.php at line 64
7.	vw_Area_Model->get_visible_areas() in /vault/core/model/plugins/forum/vw.php at line 268
8.	vw_Plugins_Forum_Model->statistics_block() in vw/XenForo/ViewPublic/Forum/List.php at line 29
9.	vw_XenForo_ViewPublic_Forum_List->renderHtml() in NFLJ/AMS/XenForo/ViewPublic/Forum/List.php at line 9
10.	NFLJ_AMS_XenForo_ViewPublic_Forum_List->renderHtml() in CTA/FeaturedThreads/ViewPublic/Forum/List.php at line 7
11.	CTA_FeaturedThreads_ViewPublic_Forum_List->renderHtml() in XenForo/ViewRenderer/Abstract.php at line 227
12.	XenForo_ViewRenderer_Abstract->renderViewObject() in XenForo/ViewRenderer/HtmlPublic.php at line 71
13.	XenForo_ViewRenderer_HtmlPublic->renderView() in XenForo/FrontController.php at line 606
14.	XenForo_FrontController->renderView() in XenForo/FrontController.php at line 158
15.	XenForo_FrontController->run() in /index.php at line 13
16.	array(3) {
17.	  ["url"] => string(47) "https://site.com/forums/"
18.	  ["_GET"] => array(0) {
19.	  }
20.	  ["_POST"] => array(0) {
21.	  }
22.	}

Issue Details

Issue Number 4713

Issue Type Bug

Project VaultWiki 4.x Series

Category Headers / Wiki Blocks

Status Fixed

Priority 2 - Fatal / Database Errors

Affected Version 4.0.13

Fixed Version 4.0.14

Milestone (none)

Software DependencyXenForo 1.x

License TypePaid

Users able to reproduce bug 0

Users unable to reproduce bug 0

Attachments 0

Assigned Users (none)

Tags (none)

September 4, 2016 9:37 AM
pegasus

VaultWiki Team
I think this will happen if, even after all permissions are inherited to the current user, the user still has no permissions defined at all (not even saved as "No") for Sidebar Blocks. I believe this would occur if all sidebar blocks in the admin panel are deleted and there are currently none.

In vault/core/model/permissions/vw.php, find:

Code:

protected function process_flatten() { $permissions = array(); foreach ($this->output AS $field => $values) {

After it, add:

Code:

$tmp = null;
Reply
September 4, 2016 12:26 PM

Alfa1

Distinguished Member

Thank you!

Reply
September 17, 2016 12:50 PM

pegasus

VaultWiki Team

In all cases, the user must be in a group that has Attachment Permissions. Given that, there are several ways this can happen:
- An improper upgrade from < 4.0.1, OR
- An improper installation, OR
- In the Lite version, the user was only a member of non-Administrator groups that never had their Sidebar Permissions changed from the default values, but whose permissions of any other type were changed, and then the Lite version was upgraded to the full version, OR
- The user is only a member of groups that were created after all VaultWiki blocks were created and was never explicitly granted Sidebar Permissions, OR
- The user is a member of a group that was explicitly denied all Sidebar Permissions at some point, even if they were later given Sidebar Permissions again, OR
- The user is a member of a group that was given a Never value for any single Sidebar Permission, OR
- The user is a member of a group that was given a Never value for any single permission of a type other than Book, Category, Feed, Redirect, and a Never value for any single Attachment Permission.

There may be other situations, but these are the ones I've been able to rationalize so far. I wanted to make sure that this error was not caused by any missing or invalid data, and that the above edit is all that is needed to correct the issue. Aside from improper install/upgrade above, while some of the cases might suggest behavior inconsistencies that should be addressed, none of the cases suggest any data problems, so no further attention to this issue is needed at this time.

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Issue: Cannot use a scalar value as an array

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