site breaking error on upgrade to Date 2.0 from rc6

It looks as if this already being discussed at #302498: Event repeats in Views when date has multiple dates.

I have found the same error and am starting to suspect a theme-related problem.

I am running Calendar, date, views, etc all the latest release versions for Drupal 6.10. Also running php 5.2.6

When upgraded calendar/date/views to the latest versions today I experienced a fatal error so restored to previous versions and re-installed one by one. So I was able to reduce the problem to the date module.

But I discovered that everything worked fine in the Garland Theme and would only break when I went back to my site's theme (Acquia Marina). Curious, I reverted to the old Date, ran update.php, re-installed date 6x2.0, update.php and tried all the other themes on my system (all are Drupal core themes). They all work, that is I do not get the error. It's not until I activate Acequia Marina that I get the error:
Cannot access empty property in /foo/sites/all/modules/date/date/date_handler_field_multiple.inc on line 127

I hope that is helpful in sorting this out, I don't even know where to begin to look.

My question would be - could this still be considered a date problem or is it a problem with the contributed theme?
Thank you

As far as I can tell, it's not a duplicate - thnx

This is interesting information, but the Garland theme is used during the upgrade, so messages that happen on upgrade should not be affected by the theme. But maybe you are seeing this message somewhere else? It's hard to tell. If you can create a reproduceable situation I can try to debug it. That means you need to be able to do a clean install, set the theme to the Acquia theme, create a date field (I need to know exactly what the field settings are -- kind of field, granularity, timezone options, etc), and then tell me where you see the error message.

I tried just switching to that theme and don't see this error anywhere, so I need more info.

I am also seeing this error on a site that was updated from 6.x-2.0-rc6 to 6.x-2.0.

Some additional observed behavior:

With the Date Repeat API module enabled, when I click "create content", I immediately get the error:

Fatal error: Cannot access empty property in .../sites/all/modules/date/date/date_handler_field_multiple.inc on line 127

If I then disable the Date Repeat API module, this error does not occur, but, the CCK Time field for my Event content_type is not visible. Next, viewing the "Manage fields" screen for the Event content_type I see the following messages:

This content type has inactive fields. Inactive fields are not included in lists of available fields until their modules are enabled.


Time (field_time) is an inactive Datetime field that uses a date_popup_repeat widget.

Since I only have a few test events setup, next I'll try Uninstalling/reinstalling the Date module. Please let me know if there is any specific troubleshooting that you would like for me to perform.

BTW, I'm using the Colorfulness Theme (6.x-5.1).

In an attempt at troubleshooting, I preformed a complete uninstall of the Calendar & Date modules, downloaded fresh copies of 6.x-2.0 from Drupal.org and reinstalled. Behavior is the same as documented in #5 above.

An export of my Event content_type is attached.

Karen, please let me know if there is any specific troubleshooting that you would like for me to perform.

With the Date Repeat API module enabled, the error also occurs when I go to a calendar display (e.g. http://example.com/calendar) or attempt to display a page containing a calender block. With the Date Repeat API module disabled, these errors does not occur. FYI.

Problem also occurs with Garland theme.
Problem also occurs with Date version = "6.x-2.x-dev" datestamp = "1235952291".

I'm having the same problem. However a virgin install (drupal 6.10 and the latest non-dev cck, date, views) does not show the symptom.

The line in question (127) is this

$node->nid = $values->{$this->aliases['nid']};

I cloned my broken system and added a print_r($node) just above the line in question in render()

stdClass Object
(
    [nid] => 4155
    [image_attach_iid] => 
    [node_vid] => 4468
    
{snip}

and the same print_r for $this->aliases

Array
(
    [vid] => node_vid
    [type] => node_type
)

So there is no $this->aliases['nid'] which is what's causing the Fatal error and the variable it's trying to set $node->nid is all ready set anyway (cloned from $values->nid)

I'm still digging to find out why this is different form a virgin install but I have a ton of modules installed.

I think I figured it out - I have both the value and the value2 (ie the end date) referenced in my view. If I just reference the start date it works with views outputting a date with a time range (eg "3 Mar 2009 1pm-3pm"). Strike that - I forgot I had some code commented out

If I uncheck group multiple values it works if I check it (including on my virgin test system) I get the error.

Confirmed. Deselection of "Group multiple values" for Configure field Content: - value on my Views configuration screen (/admin/build/views/edit/upcoming_events) results in the error no long occurring.

Hopefully this is enough to point our hard working code mavens in the right direction!

So, TallDavid, just trying to understand: you revert to a pre Date2.0 installation, deselect to "group multiple values" in your view, then proceed to upgrade to Date2.0?
Thanks - ToddV (from #2 above)

Todd,
no, using Date 6.x-2.0, I deselect "Group multiple values" in the view, and the problem no longer occurs.

I concur that the issue is no longer occurring when "Group Multiple Values" is not selected in any of my calendars. But I'm not sure if the fact that it's not happening has a cause/result relationship or if something else changed...

So to elaborate on what I did to apparently fix this error:
I have three different calender views, each with multiple displays. Only one display in each view has a field with a type that allows the toggling of the setting to "group multiple values". It's a CCK date field. So before upgrading to the latest Date I made sure that "group multiple values" was deselected in each of these displays. Update.php gives an error on the first run-through but running it a second time seems to get everything shipshape.
Thank you!
TV

Upgrade to the latest version of CCK. Pretty sure that is the source of the problem.