How do I set the locale if I don't have a param?

[tkhobbes]

For now I am setting a default locale (de) in my application.rb, as I am not yet sure how I will implement locales and locale switching in my app.
This works as expected everywhere in my app, i. e. the de locales are used everywhere.
I am loading two locales for pagy, via config/initializers/pagy.rb:

Pagy::I18n.load({ locale: 'en' }, { locale: 'de' })

When I use a URL like localhost:3000?locale=de and the following code, pagy i18n behaves as expected:
before_action { @pagy_locale = params[:locale] }

But now I want to do something like this - however that is not working (pagy shows en, which is the first loaded locale, i. e. it doesn't recognize that it should use de):
before_action { @pagy_locale = params[:locale] || I18n.default_locale }

When I log @pagy_locale, it correctly seems to be set to "de" - why isn't pagy picking that up?

What am I missing?

[ddnexus]

Not sure I get your problem. Could you explain it explicitly?

If I have to guess... maybe the following sentence from the doc may be considered:

If the @pagy_locale is nil or missing pagy will serve the first locale you set in the configuration.

[tkhobbes]

Thanks for the quick reply - this is my issue: If I do something like <%= @pagy_locale %> somewhere on a view, it says 'de'. So it seems to be set. BUT pagy doesn't pick the locale up - the buttons are labelled in english, not in german.
When I explicitely use http://localhost:3000?locale=de, @pagy_locale is still "de" (obviously), AND pagy shows the german labels.

I do not want to set the locale explicitely in the params for now. I have set it in my application.rb as default_locale to "de".
Whether or not I do anything in a before_action lambda... pagy always shows the english labels on the buttons though.

So my question is: Why does @pagy_locale correctly show "de" but pagy itself doesn't pick up the locale for displaying the buttons?

Hope that is more clear.

[ddnexus]

So you are saying that it works only when there is a locale param in the request.

Maybe.

I will be able to check that detail in a few days.

Meanwhile, if you just invert the order of the locales hash arguments in the initializer, it should use de (first locale argument) when there is no locale param, so at least it will work the way you want. (and without using || I18n.default_locale)

[tkhobbes]

Thanks - yes confirmed, my observation is exactly this.

[ddnexus]

OK, I got a few problems recently. Sorry for the late answer.

The easiest and recommended way to work with default de locale is setting de as the first locale:

Pagy::I18n.load({ locale: 'de' }, { locale: 'en' })

Then you can simply do:

before_action { @pagy_locale = params[:locale] }

There will be no :locale param for de, only for en (and/or any other locale that is not the first default).

before_action { @pagy_locale = params[:locale] || I18n.default_locale }
When I log @pagy_locale, it correctly seems to be set to "de" - why isn't pagy picking that up?

It could be a number of things: I should have a minimal example of your case to be able to understand what is going on in your code.

[tkhobbes]

Thank you. I will implement as per the above. If you want to check out my repository - it's here: https://github.com/tkhobbes/ltb-rails - I don't think I am doing anything special but you might figure out what is going on. Pagination is eg happening on books/index.html.erb.

[ddnexus]

Does it work with the recommended way, and does it fit your needs?

[tkhobbes]

It does work and it fits my needs. Still weird that the other approach did not work. But ok for the current use case.
Thanks for looking into it!

[ddnexus]

Glad that it works.

About the failure of the other approach: a possible suspect might be the I18n.default_locale not set as you would expect at the time of the before_action.