https://bugzilla.wikimedia.org/show_bug.cgi?id=73496
Bug ID: 73496
Summary: Support new Entity types
Product: MediaWiki extensions
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: WikidataRepo
Assignee: wikidata-b...@lists.wikimedia.org
Reporter: jeroen_ded...@yahoo.com
CC: wikidata-b...@lists.wikimedia.org
Web browser: ---
Mobile Platform: ---
This is a bug to track the issues in Wikibase Repository that prevent it from
working with new types of Entities, and thus the blockers for commons, advanced
queries, etc.
The two main issues are:
1. Bad assumptions about Entities. For instance that they all have statements,
or all have a fingerprint.
2. OCP violations: code that handles entities in a way that requires specific
handling for different types, without providing an extension mechanism.
These can typically be found together.
Related emails:
* https://lists.wikimedia.org/pipermail/wikidata-tech/2014-August/000546.html
* https://lists.wikimedia.org/pipermail/wikidata-tech/2014-August/000545.html &
https://lists.wikimedia.org/pipermail/wikidata-tech/2014-August/000546.html
Wikibase DataModel and Wikibase QueryEngine contained several instances of
these problems as well. Since those have all been fixed some time ago, there
are plently of examples of how this can be done.
To spot code making one of the described mistakes, you can look for:
* code type hinting against Entity
* code using deprecated methods of Entity
* classes that have a name starting with "Entity" and have checks like "if is
item"
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