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Fix type mismatch between what is returned by getLinkList (list of arrays that contains non-serializable TitleValue) and what is expected by ParserOutput.#325

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Universal-Omega merged 1 commit intoUniversal-Omega:masterfrom
Wikia:fix-types-mismatch
Mar 25, 2025
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Fix type mismatch between what is returned by getLinkList (list of arrays that contains non-serializable TitleValue) and what is expected by ParserOutput.#325
Universal-Omega merged 1 commit intoUniversal-Omega:masterfrom
Wikia:fix-types-mismatch

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@adpaste adpaste commented Mar 20, 2025

The new version of DPL is causing MediaWiki to log Unable to serialize JSON exceptions on some of the pages when ParserCache is trying to serialize ParserOutput to JSON.

This is caused by the fact that the new getLinkList is not a 1:1 replacement for various deprecated getters in ParserOutput, as it returns a different type of data. And we shouldn't assign that to the internal fields of ParserOutput.

For now, I have replaced it with direct field access, as I currently see no other viable solution to resolve this issue.

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// we can remove the templates by save/restore
if ( $reset['templates'] ?? false ) {
$saveTemplates = $parserOutput->getLinkList( ParserOutputLinkTypes::TEMPLATE );
$saveTemplates = $parserOutput->mTemplates;
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This will only mean they can't be accessed at all in newer MediaWiki because these are private in ParserOutput now: https://github.com/wikimedia/mediawiki/blob/46ac6adf8581ebdfd1a5225aaafe5684b140c25d/includes/parser/ParserOutput.php#L174

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Yes, these fields are private, but the __get() and __set() methods are still available in ParserOutput.

They are currently used here: DynamicPageList3 Hooks.php, line 606.

This should fix the issue for now. However, there will be problems when these deprecated methods are removed, but I don't see any alternatives.

…arrays that contains non-serializable TitleValue) and what is expected by ParserOutput.
@adpaste adpaste force-pushed the fix-types-mismatch branch from 52af4aa to 882e76c Compare March 25, 2025 11:21
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codecov-commenter commented Mar 25, 2025

Codecov Report

Attention: Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.

Project coverage is 12.87%. Comparing base (ea3c2f9) to head (882e76c).

Files with missing lines Patch % Lines
includes/Hooks.php 0.00% 6 Missing ⚠️
includes/Parse.php 0.00% 2 Missing ⚠️
Additional details and impacted files
@@             Coverage Diff              @@
##             master     #325      +/-   ##
============================================
+ Coverage     10.77%   12.87%   +2.09%     
- Complexity     1569     1576       +7     
============================================
  Files            23       23              
  Lines          4259     4776     +517     
============================================
+ Hits            459      615     +156     
- Misses         3800     4161     +361     

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@Universal-Omega Universal-Omega merged commit 5f439c2 into Universal-Omega:master Mar 25, 2025
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3 participants