Fatal error: Cannot access empty property

+1 on that for me to but with a slight variation.

I have a role called Author and they get the following error:

user warning: Unknown column 'n.nid' in 'on clause' query: SELECT parent_nid, collapsed FROM draggableviews_collapsed INNER JOIN node_access na ON na.nid = n.nid WHERE (na.grant_view >= 1 AND ((na.gid = 0 AND na.realm = 'all') OR (na.gid = 2 AND na.realm = 'node_privacy_byrole_role') OR (na.gid = 4 AND na.realm = 'node_privacy_byrole_role') OR (na.gid = 9 AND na.realm = 'node_privacy_byrole_user') OR (na.gid = 2 AND na.realm = 'term_access') OR (na.gid = 4 AND na.realm = 'term_access'))) AND ( uid = 9) in /home/foobar/public_html/drupal/sites/all/modules/draggableviews/draggableviews_theme.inc on line 321.

Drag and drop does not work for any users in that role, despite being given the permission. I have already removed and uninstalled and reinstalled the module which fixed problems I had for Admin but now this.

Administrator originally could drag and drop without problems but now it doesnt work for them either! If I create a new user with the Admin role then they get the error as above:

Fatal error: Cannot access empty property in \sites\all\modules\draggableviews\draggableviews.inc on line 173

It all used to work perfectly before the changes to Views API, etc. So I presume it's something simple somewhere (hope!)

I am happy to donate/sponsor this module if this helps get a resolution faster :)

Seems to be permissions based issues somehow?

Unsure if it is relevant but the draggableviews_collapsed table has zero rows in my database. Looking at the code that causes the problem it seems like that needs to be different somehow?

PART SOLVED: I have resolved all of these problems except for the Cannot access empty property error.

1. I had the Weight field hidden from the view which was preventing everyone from dragging and dropping. I un-hid this.

2. I had to enable the permission: Administer Nodes

Once I did this I was able to drag and drop as the site Admin and as Author. However if I made another member an Admin they still get the Fatal error above.

Sorry for the diversion but others may find my experiences helpful with solving their problems.

Try this:
I released a development version at http://ftp.drupal.org/files/projects/draggableviews-6.x-3.x-dev.tar.gz

I changed the "administer nodes" permission to "Allow reordering" permission. Now all user with "Allow reordering" checked should be able to drag nodes.

I think the user warning: Unknown column 'n.nid' in 'on clause' query: SELECT parent_nid, colla... was caused by the nodeaccess module on your system i unintentionally invoked. I fixed it now. Thanks for reporting this.

Since I was not able to reproduce the Fatal error: Cannot access empty property in \sites\all\modules\draggableviews\draggableviews.inc on line 173 I added some debug code that should output important information for the next time the error occurs - hope so :)

Mmm.. there must be some modules that constrict views or cck access.

At the moment I can't do anything, because I still couldn't reproduce the error. But I really would like to :)

May you send me a list of all installed modules on your system?

greetings,
sevi

Conclusion:
Content Permissions module is likely to cause errors that need to be searched for all night long.

This will be written in documentation with fat latters :)

#7 did the trick for me aswell. Two thumbs up, watch your CCK field permissions. :)

Thx mate this worked like a charm

Simply just uninstalling and re-draggableviews did the trick for me after i spend 4 hours on this :)

Content Permissions was the real problem (in my stack).
Thanks dydecker.