Improve getDbIndex when index is undefined

[belgattitude]

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[changeset-bot]

🦋 Changeset detected

Latest commit: ea6c8f2

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@soluble/cache-ioredis	Patch

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[qlty-cloud-legacy]

Code Climate has analyzed commit ea6c8f2 and detected 0 issues on this pull request.

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[codecov]

Codecov Report

Merging #85 (ea6c8f2) into main (ca4aca2) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #85   +/-   ##
=======================================
  Coverage   93.63%   93.63%           
=======================================
  Files          36       36           
  Lines         644      644           
  Branches      176      176           
=======================================
  Hits          603      603           
  Misses         41       41           

Flag	Coverage Δ
cache_interop_unit	59.74% <ø> (ø)
cache_ioredis_unit	49.20% <100.00%> (ø)
cache_redis_unit	45.23% <ø> (ø)
dsn_parser_unit	100.00% <ø> (ø)
e2e	85.61% <100.00%> (ø)

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Impacted Files	Coverage Δ
packages/cache-ioredis/src/ioredis-dsn.util.ts	100.00% <100.00%> (ø)