#29144: `DjangoTranslation.merge` loses catalog fallbacks -------------------------------------+------------------------------------- Reporter: Patryk Zawadzki | Owner: Patryk | Zawadzki Type: Bug | Status: assigned Component: | Version: 2.0 Internationalization | Severity: Normal | Resolution: Keywords: | Triage Stage: | Unreviewed Has patch: 1 | Needs documentation: 0 Needs tests: 0 | Patch needs improvement: 0 Easy pickings: 0 | UI/UX: 0 -------------------------------------+-------------------------------------
Comment (by Matt Westcott): Very happy to see this being addressed! (We were bitten by this on Wagtail... https://github.com/wagtail/wagtail/issues/3600 ) When I looked into this some time ago, I think I stumbled at the point of making Django's precedence rules behave correctly with gettext's: to be totally correct, I believe it should apply all of Django's translation- finding rules (LOCALE_PATHS in sequence, then INSTALLED_APPS in sequence, then Django's own) for the most specific locale (`de_DE.ISO8859-1`), followed by the same sequence of rules for the next locale (`de_DE`), and so on. In the case of the current PR, I suspect that there are some possible setups where this ordering isn't strictly followed, but as far as I can see, this only arises when there are three or more locale identifiers in play. (The primary catalog is built up with a `dict.update`, as per Django's existing code, but the fallbacks are added to the end of the chain - as per the gettext implementation of `add_fallback`. So, after it's finished pulling in all the translations, the final order of precedence will be all of the `de_DE.ISO8859-1` translations, followed by `de_DE` and `de.ISO8859-1` and `de` for each app - rather than all of the `de_DE.ISO8859-1` translations, followed by all of the `de_DE` translations, followed by all of the `de.ISO8859-1` translations...). Obviously, this is an incredibly obscure and minor point relative to the issue being fixed here (and doing it 100% correctly probably requires replicating or monkeypatching gettext internals), so I'm happy for this to be accepted as-is. I'm only raising this as a gotcha in case a more alert reviewer notices a more severe side-effect :-) -- Ticket URL: <https://code.djangoproject.com/ticket/29144#comment:2> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To post to this group, send email to django-updates@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/064.0838c63649be0c8c19eedaef0535adbf%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.