Cannot use object type stdClass as array in classes/statistics/MetricsDAO.inc.php

Software Support
1

Hi
I’m using OJS version 3.1.2-1
When generating a custom statistics report I get a warning then an error see error log below. The result is just a blank page with a 500 error.
If this is a permission error which directory would this be writing too? It already has write permissions to the cache directory so I’m a bit confused.

[Wed Jan 15 12:14:50.437308 2020] [php7:warn] PHP Warning: file_put_contents(cache/fc-pluginSettings-0-defaultthemeplugin.php): failed to open stream: Permission denied in lib/pkp/classes/cache/FileCache.inc.php on line 90

PHP Fatal error: Uncaught Error: Cannot use object of type stdClass as array in classes/statistics/MetricsDAO.inc.php:34
Stack trace:
#0 plugins/generic/usageStats/PKPUsageStatsReportPlugin.inc.php(84): MetricsDAO->getMetrics(‘ojs::counter’, Array, Object(stdClass), Array, NULL)
#1 plugins/generic/usageStats/OJSUsageStatsReportPlugin.inc.php(32): PKPUsageStatsReportPlugin->getMetrics(‘ojs::counter’, Array, Object(stdClass), Array, NULL)
#2 /lib/pkp/pages/management/PKPToolsHandler.inc.php(208): OJSUsageStatsReportPlugin->getMetrics(‘ojs::counter’, Array, Object(stdClass), Array)
#3 /lib/pkp/pages/management/PKPToolsHandler.inc.php(64): PKPToolsHandler->generateReport(Array, Object(Request))
#4 /lib/pkp/classes/core/PKPRouter.inc.php(390): PKPToolsHandler->tools(Array, Object(Request))
#5 /lib/pkp in /classes/statistics/MetricsDAO.inc.php on line 34, referer: /management/tools/reportGenerator

2

Just flagging this! Our custom reports are failing for all of our journals - we’re not sure if this started with our upgrade to 3.1.2-1, but it’s consistent across all of our journals. Other stats reports are still working, but custom reports just generate a 500 error. jhennig (above) captured some error messages from the log, but we need help decoding them and trying to id the problem.

Thanks for any help anyone can provide!

3

Hi all,

I suspect you need to apply pkp/pkp-lib#5302 Cast stdClass to array to avoid warnings · pkp/pkp-lib@8486017 · GitHub to resolve this. (Please check to see if the patch will apply cleanly e.g. using the --dry-run option to the patch tool before you actually apply it.)

Note that this is already included in OJS since version 3.1.2-3, so upgrading is also an option.

Regards,
Alec Smecher
Public Knowledge Project Team

4

Thanks @asmecher - we’ll give that a try and see if it resolves the issue!

1 Like
5

You may also need this one as well:

https://github.com/pkp/pkp-lib/commit/103eeed2fc9cfb71aa7d02bcc683e542f6a2a1c4

If you run custom reports with date ranges.

Cheers,
Jason

1 Like