Bug: Error exporting Computer to PDF when OCS Inventory NG is enabled (GLPI 11

[jairo9904-prog]

Description

When trying to export a Computer to PDF using the PDF plugin, an error occurs:

"Unexpected error occurred"

This only happens when the OCS Inventory NG plugin is enabled.

If the plugin is disabled, PDF export works correctly.

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Environment

• GLPI version: 11.0.5
• PDF plugin: 4.1.2
• OCS Inventory NG plugin: (your version here)
• PHP: >= 8.2

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Steps to reproduce

1. Enable OCS Inventory NG plugin
2. Go to Assets → Computers
3. Open any computer (even a newly created one)
4. Click "Print to PDF"

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Expected behavior

PDF should be generated correctly.

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Actual behavior

Error message:

"Unexpected error occurred"

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Logs

[2026-03-18] glpi.CRITICAL: Uncaught PHP Exception:
Attempted to call an undefined method named "getID"
of class "PluginPdfComputer"
at Ocslink.php line 1015
Backtrace:
./marketplace/ocsinventoryng/src/Ocslink.php:1015
./marketplace/ocsinventoryng/src/Ocslink.php:885
./marketplace/pdf/inc/common.class.php:54
./marketplace/pdf/inc/computer.class.php:44

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Additional information

• The issue only affects Computers
• Monitors and Tickets export correctly
• Happens even with newly created computers
• Disabling OCS plugin resolves the issue

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Possible cause

OCS plugin assumes that the item object has method getID(), but when exporting PDF, the object is PluginPdfComputer, which does not implement that method.

[grillodemetal]

I found the root cause of the issue and applied a workaround that fixed PDF generation for OCS imported computers.

The problem occurs because getOCSServerForItem() assumes every CommonGLPI object implements getID().

However, during PDF generation the PDF plugin passes a virtual object of type:

PluginPdfComputer

which does not implement getID(), causing:

Attempted to call an undefined method named "getID" of class "PluginPdfComputer"

I fixed it by adding a defensive validation inside:

marketplace/ocsinventoryng/src/Ocslink.php

Modified function:

public static function getOCSServerForItem(CommonGLPI $item)

Added:

if (!method_exists($item, 'getID')) {
    return 0;
}

After applying the patch:

• PDF generation works correctly
• No crash with OCS imported computers
• No impact on OCS synchronization

Ocslink.php