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Ensure that Wikibase data access to MediaInfo on file description pages works with MCR
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Description

Wikibase provides data access to entities via parser functions and Lua functions. That access mechanism needs to work to access MediaInfo entities stored file description pages using MCR. That is, the wikitext slot has to be able to access the MediaInfo entity stored in the mediainfo slot of the same page.

Note:

  • this is not a requirement for the MVP rollout, since that only covers multilingual captions, not full functionality for statements.
  • this should "just work", since data access is implemented via an EntityLookup, and no knowledge about SlotRecords or Content objects is needed outside the Entity(Revision)Lookup implementation (see T194729).
  • since there is no plan to support atomic edits across the wikitext and mediainfo slots, rendering of the wikitext can always be based on the stored version of the entity. So no access mechanism is needed for unsaved data, which would be needed for full cross-slot transclusion support (T187935).
  • however, the wikitext (main) slot needs to be re-rendered when structured data changes (subject to usage tracking), which in turn may be tricky because of replication lag: if the re-rendering is triggered before the data is available on all replicas, the old version of the data will be used for the new rendering. This needs to be avoided somehow.

Event Timeline

daniel created this task.May 15 2018, 8:43 AM
Restricted Application added a project: Wikidata. · View Herald TranscriptMay 15 2018, 8:43 AM
Restricted Application added a subscriber: Aklapper. · View Herald Transcript
daniel added a subscriber: Cparle.May 15 2018, 8:43 AM
Vvjjkkii renamed this task from Ensure that Wikibase data access to MediaInfo on file description pages works with MCR to 5xcaaaaaaa.Jul 1 2018, 1:09 AM
Vvjjkkii triaged this task as High priority.
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Vvjjkkii removed a subscriber: Aklapper.
CommunityTechBot renamed this task from 5xcaaaaaaa to Ensure that Wikibase data access to MediaInfo on file description pages works with MCR .Jul 2 2018, 4:10 PM
CommunityTechBot raised the priority of this task from High to Needs Triage.
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