Search plugin fallback language cannot be set

[cbratschi]

Describe the Bug

Currently the search plugin indexes all languages and uses the default locale as fallback language. In case a language is missing we don't want to have an entry in the search for that locale at all.

payload/packages/plugin-search/src/utilities/syncDocAsSearchIndex.ts

Line 31 in c658022

docToSyncWith = await payload.findByID({

Proposed change: allow a fallback language in the plugin's settings and in case of 'none' skip any missing locales (i.e. do not create or update them).

Link to the code that reproduces this issue

https://github.com/cbratschi/payload

Reproduction Steps

Use Payload with a couple of locales. Use the search plugin. All locales are populated in the database.

Which area(s) are affected? (Select all that apply)

plugin: search

Environment Info

Binaries:
  Node: 22.12.0
  npm: 10.9.0
  Yarn: 1.22.22
  pnpm: N/A
Relevant Packages:
  payload: 3.13.0
Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 24.1.0: Thu Oct 10 21:05:23 PDT 2024; root:xnu-11215.41.3~2/RELEASE_ARM64_T6031
  Available memory (MB): 65536
  Available CPU cores: 16