[zope2-tracker] [Bug 815469] [NEW] ZCatalog 2.13.12 doesn't preserve relevance in search results

[Ross Patterson]

Public bug reported:

The change log for ZCatalog 2.13.12 says:

"Replaced `weightedIntersection` and `weightedUnion` calls with their
non-weighted version, as we didn't pass in weights."

But the BTrees.Interfaces documents:

"def weightedIntersection(c1, c2, weight1=1, weight2=1)"

Meaning that by default, both results sets are given equal weight.  IOW,
the wieghts provided by _apply_index still have an effect when weight1
and weight2 are not provided.  I have tests asserting relevance in
search results order that pass under previous versions but fail under
this version.  Please restore the use of weightedIntersection.

** Affects: zope2
     Importance: Undecided
         Status: New

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Title:
  ZCatalog 2.13.12 doesn't preserve relevance in search results

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