Drupal 7: Warning: array_flip() [function.array-flip]: Can only flip STRING and INTEGER values! [#1870610]

Background:

I have content type called 'products'. There is a view that filters and displays 'products'. When clicking on a specific 'products', we are taken to it's corresponding content page. This page utilizes one display from the 'products-view' (uses contextual filters) and another from a 'application-view' - both as blocks on the side. The output on the content page (to the right of the two blocks) is generated from a custom node.tpl file, which just displays the body field of the content 'products'.

I am using xampp 1.7.7:

Apache/2.2.21 (Win32)
mod_ssl/2.2.21
OpenSSL/1.0.0e
PHP/5.3.8 mod_perl/2.0.4 Perl/v5.10.1
MySQL client version: mysqlnd 5.0.8-dev - 20102224 - $Revision: 310735 $

I've also have done a major upgrade - from Drupal 6 to Drupal 7 (see my second attached file)

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My error:

The following dpm() error (warning) is displayed on a specific 'products' page.

Warning: array_flip() [function.array-flip]: Can only flip STRING and INTEGER values! in DrupalDefaultEntityController->load() (line 179 of C:\mamp\public_html\test\includes\entity.inc).

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Definition:

array_flip — Exchanges all keys with their associated values in an array

Short conclusion: Values of arrays need to either be 'string', or 'integer' type, otherwise, array_flip cannot perform.

Source: http://php.net/manual/en/function.array-flip.php

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Debugging

I'm using XDebug and NetBeans to debug. I opened 'entity.inc', and placed a 'breakpoint' at the lines:

$passed_ids = !empty($ids) ? array_flip($ids) : FALSE;

After beginning the 'Debug Project' (pressing 'F5'). I pressed 'Continue' on the NetBeans tool bar to succeed each iteration (see attached file)

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Original post on drupal.org forum: https://drupal.org/node/1868754#comment-6861560

Comment	File	Size	Author
#1	module-list.txt	8.76 KB	jmm42
	backtrace.txt	13.42 KB	jmm42

Comments

Comment #1

jmm42 commented 19 December 2012 at 20:56

Status	File	Size
new	module-list.txt	8.76 KB

Comment #1.0

jmm42 commented 19 December 2012 at 20:56

Issue summary:

View changes

Webserver information

Comment #2

catch

he/him

English

commented 19 December 2012 at 21:18

Category:	bug	» support
Status:	Active	» Postponed (maintainer needs more info)

This happens if invalid data gets passed to entity_load(). It's not a bug in that function (and hence not a core bug), it means it was passed bad data.

Rather than posting every backtrace from entity_load(), you'd be better off adding some debug from when the array is invalid then trying to work out where that came from (usually it's a NULL or FALSE as the array value).

Comment #3

jmm42 commented 19 December 2012 at 22:02

array_flip() expects data to be either string or integer. But, as we can see from 'iteration 5' of the backtrace, we have an array value instead of string or integer. This causes array_flip() to choke.

Fifth Iteration

Variables:
ids: array[1]
[0] array[10]
[filename] string "core.jpg"
[filepath] string "sites/default/files/imagefield_default_images/core.jpg"
[filemime] string "image/jpeg"
[source] string "default_image_upload"
[destination] string "sites/default/files/imagefield_default_images/core.jpg"
[filesize] integer "5620"
[uid] string "1"
[status] integer 1

How do I add a debug if array_flip() takes a bad value, in our case, an array (as shown above)?
[timestamp] integer 1340815115
[fid] boolean 0

Comment #4

catch

he/him

English

commented 19 December 2012 at 22:12

Oh that'll do, I couldn't see it just scanning through. Looks like #850946: Warning after enabling Insert: Warning: array_flip(): Can only flip STRING and INTEGER values! or similar.

Comment #5

jmm42 commented 19 December 2012 at 22:24

Do you think the error is being generated because my entity uses an image field - and, hence why you claim it to be similar to the link you provided?

Comment #6

jmm42 commented 19 December 2012 at 22:35

I'm looking at my new upgraded Drupal 7 '[site:name]/admin/modules', and it still has submodules stuck in Drupal 6 - which used to be part of CCK:

Email
FileField
FileField Meta
ImageField

I am not able to uninstall these submodules, nor delete them from the directory:

[site:name]/sites/all/modules

since CCK is now part of core. I needed CCK to complete upgrade paths from D6 to D7 during my upgrade. Do you think this may be the issue? If so, how do I remove these submodules, which I cannot uninstall and no located in the modules directory: '[site:name]/admin/modules'?