[Bug] Fix empty map serialization behaviour
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Description

The problem is outlined here:
https://lists.wikimedia.org/pipermail/wikidata-tech/2014-September/000575.html

Place where a serializer maybe can be told to differentiate for json output: extensions/Wikibase.git/repo/includes/api/ApiHelperFactory.php getSerializerFactory()

Version: unspecified
Severity: major
Whiteboard: u=dev c=backend p=3

Details

Reference: bz71349

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Status	Assigned	Task
		· · ·
Open	None	T88991 improve Wikidata dumps [tracking]
Invalid	None	T109969 Wikidata breaking API changes (tracking)
Resolved	JanZerebecki	T73349 [Bug] Fix empty map serialization behaviour
Resolved	Addshore	T64188 Replace old serialization code in lib with datamodel serialization
Resolved	None	T72606 Add ability to output objects instead of arrays for maps in WikibaseDataModelSerialization to not confuse them with lists when they are empty
		· · ·

Event Timeline

• bzimport raised the priority of this task from to High.Nov 22 2014, 4:00 AM

• bzimport added a project: MediaWiki-extensions-WikibaseRepository.

• bzimport set Reference to bz71349.

• bzimport added a subscriber: Unknown Object (MLST).

JanZerebecki created this task.Sep 26 2014, 10:14 AM

Bug 71458 has been marked as a duplicate of this bug. ***

Lydia_Pintscher added a project: Wikidata.Dec 1 2014, 2:29 PM

Lydia_Pintscher removed a subscriber: Unknown Object (MLST).

Lydia_Pintscher removed a subscriber: Unknown Object (MLST).Dec 1 2014, 2:31 PM

As reported in https://lists.wikimedia.org/pipermail/wikidata-l/2015-January/005325.html https://www.wikidata.org/wiki/Special:EntityData/Q4383128.json has a "snaks":[] instead of a "snaks":{} .

Jimkont subscribed.Feb 28 2015, 7:43 AM

JanZerebecki mentioned this in T91117: [Bug] Empty JSON maps are serialized as empty lists in XML dumps.Mar 2 2015, 5:03 PM

Liuxinyu970226 subscribed.Mar 4 2015, 1:49 PM

Tobi_WMDE_SW added a parent task: T88991: improve Wikidata dumps [tracking].Mar 11 2015, 1:45 PM

Tobi_WMDE_SW added a project: Wikibase-DataModel-Serialization.

Tobi_WMDE_SW set Security to None.

Ricordisamoa subscribed.Mar 11 2015, 2:32 PM

Related problem in the mediawiki API output: T12887

Lydia_Pintscher mentioned this in T92962: Find further breaking (API) changes that could be rolled out together with T56085.Jun 30 2015, 4:14 PM

JeroenDeDauw closed subtask T64188: Replace old serialization code in lib with datamodel serialization as Resolved.Aug 5 2015, 5:12 AM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptAug 5 2015, 5:12 AM

Addshore renamed this task from Fix empty map serialization behaviour to [Bug] Fix empty map serialization behaviour.Aug 21 2015, 1:00 PM

*goes to check if this still happens or not* ....

Addshore added a parent task: T109969: Wikidata breaking API changes (tracking).Aug 23 2015, 9:34 AM

It seems that the Web API for wbeditentities is also returning empty lists when creating new items (at least on test.wikidata.org). Is this the same bug or a different component?