73 lines
2.3 KiB
Ruby
73 lines
2.3 KiB
Ruby
# frozen_string_literal: true
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module ActiveModel
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# = Active \Model \Translation
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#
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# Provides integration between your object and the \Rails internationalization
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# (i18n) framework.
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#
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# A minimal implementation could be:
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#
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# class TranslatedPerson
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# extend ActiveModel::Translation
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# end
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#
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# TranslatedPerson.human_attribute_name('my_attribute')
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# # => "My attribute"
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#
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# This also provides the required class methods for hooking into the
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# \Rails internationalization API, including being able to define a
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# class-based +i18n_scope+ and +lookup_ancestors+ to find translations in
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# parent classes.
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module Translation
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include ActiveModel::Naming
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# Returns the +i18n_scope+ for the class. Override if you want custom lookup.
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def i18n_scope
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:activemodel
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end
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# When localizing a string, it goes through the lookup returned by this
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# method, which is used in ActiveModel::Name#human,
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# ActiveModel::Errors#full_messages and
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# ActiveModel::Translation#human_attribute_name.
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def lookup_ancestors
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ancestors.select { |x| x.respond_to?(:model_name) }
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end
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MISSING_TRANSLATION = -(2**60) # :nodoc:
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# Transforms attribute names into a more human format, such as "First name"
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# instead of "first_name".
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#
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# Person.human_attribute_name("first_name") # => "First name"
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#
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# Specify +options+ with additional translating options.
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def human_attribute_name(attribute, options = {})
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attribute = attribute.to_s
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if attribute.include?(".")
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namespace, _, attribute = attribute.rpartition(".")
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namespace.tr!(".", "/")
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defaults = lookup_ancestors.map do |klass|
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:"#{i18n_scope}.attributes.#{klass.model_name.i18n_key}/#{namespace}.#{attribute}"
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end
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defaults << :"#{i18n_scope}.attributes.#{namespace}.#{attribute}"
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else
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defaults = lookup_ancestors.map do |klass|
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:"#{i18n_scope}.attributes.#{klass.model_name.i18n_key}.#{attribute}"
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end
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end
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defaults << :"attributes.#{attribute}"
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defaults << options[:default] if options[:default]
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defaults << MISSING_TRANSLATION
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translation = I18n.translate(defaults.shift, count: 1, **options, default: defaults)
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translation = attribute.humanize if translation == MISSING_TRANSLATION
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translation
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end
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end
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end
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