[OSM-dev] relations refering to deleted objects

[Richard Fairhurst]

Mitja Kleider wrote:
> That tag is old, the changeset is tagged 
> created_by = Potlatch 1.4 (live de)

Ah, sorry.

I think you're misreading how the relation integrity checks work. The API
only checks whether an entity is still visible when the entity is _added_ to
a relation. For performance reasons, it does not check the entities formerly
in the relation. It assumes that they're ok, which in the case of historic
(pre-integrity check) data may not be the case. See preconditions_ok? in
app/models/relation.rb in the Rails port for the code.

cheers
Richard
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