What is the correct way to generate dynamic methods in Rails?

Question

MongoDB

I can't figure out how to make define_method work:
Mongoid,
localized_fields are used
Everything is fine, but in some questions it is terribly inconvenient to work:
For example, to explicitly get the Russian version of the name field - I need to knock on name_translations[:ru] - which is wildly inconvenient,
Or else engage in constant locale switching, like this:

curr = I18.locale
I18n.locale = :en
Model.name
I18n.locale = curr

Which, by the way, does not guarantee that there will be a Russian version of the field. Basically, it's more fun.
So far, the number of localized fields is finite, in principle, you can simply do
def name__ru and def name__ru(value)
However, I would like to achieve a slightly different behavior: We look at the model, and for each field we see with the localized parameter? = true
we declare a seter and a geter according to the rules "#{name}__#{loc}".
I actually wrote the following small module (for now, only a getter).

module My::Localized
  module ClassMethods
    def params_localized
      self.attribute_names.each do |value|
        if self.fields[value].localized?
          I18n.available_locales.each do |loc|
            define_method("#{value}__#{loc}")  do
              self["#{value}_translations"][loc]
            end
          end
        end
      end
    end
  end
end

But I can’t figure out how to make it work when connected to the Model ...
Now it doesn’t work at all ...

Answer 1

module My::Localized
  def self.params_localized
  end
end

and then include My::Localized
Either

module My::Localized
  def params_localized
  end
end

and then extend My::Localized
Or Concerns
PS:
A bit off topic, your code with changing locales can be made more convenient

def with_locale(locale)
  old_locale = I18n.locale
  I18n.locale = locale
  begin
    yield
  ensure
    I18n.locale = old_locale
  end
end

Usage:

with_locale :ru do
  # ...
end

Answer 2

How do you connect the module and how should the method be called then? And so you can use Concerns .