Column fallback to original value every time there's no translation present

[benoror]

I stumbled upon ColumnFallback (#512 (comment)) which mostly meets our needs, except for one small tangent:

Expected Behavior

TL;DR; Wondering if there's a clean way to default to column value every time there's a missing translation, including for I18n.default_locale.

Full Context:

At my project we currently have a huge set of tables with content that hasn't been translated, we would like to have a default_locale and other available languages but we're having second thoughts of the redundancy of copying over / regenerating the very same content all over again to the translation tables, hence we would like to default to the original value always, unless there's an explicit translation present, independently of the locale (as said before, even default_locale)

Actual Behavior

column_fallback true

It always fallbacks to looking at the translated value except for default_locale

Possible Fix

A) Workaround

Possibly using a Proc for the plugin value with custom logic?

B) Code feature (if ever gets contemplated):

In the original implementation I suppose the change would be somewhere around here:

mobility/lib/mobility/plugins/active_record/column_fallback.rb

Line 29 in 7cbca64

locale == I18n.default_locale ? model.read_attribute(attribute) : super

...to always call super?

I haven't dig into the newer implementation tho

[benoror]

OK easiest fix for A) is as simple as:

    column_fallback ->(locale) {
      I18n.available_locales
    }

this is simple enough that might not merit a full blown feature.

closing it now

[benoror]

I am so dumb, that effectively disables Mobility all together 🙈

Going back to square one, wondering if there's a way to check wether the translation exists or not within that Proc 🤔

[mclaros]

@benoror I'm not sure I understand your question, but I'm pretty sure that lambda needs to return a boolean. A truthy result would tell Mobility to go ahead and fallback to the original column.

For example, I have a use case where I want Mobility to always fallback for English locales, regardless of region, so here's what I set:

# NOTE: Prior to Mobility, all table column values have been in English, without
# regional differences. We want the Mobility to ignore handling 'en' content as
# translations and instead read/write to the original columns.
column_fallback -> (locale) { locale.to_s.starts_with?('en') }