70 lines
2.3 KiB
Ruby
70 lines
2.3 KiB
Ruby
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. Overwrite 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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self.ancestors.select { |x| x.respond_to?(:model_name) }
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end
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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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options = { :count => 1 }.merge!(options)
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parts = attribute.to_s.split(".")
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attribute = parts.pop
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namespace = parts.join("/") unless parts.empty?
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attributes_scope = "#{self.i18n_scope}.attributes"
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if namespace
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defaults = lookup_ancestors.map do |klass|
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:"#{attributes_scope}.#{klass.model_name.i18n_key}/#{namespace}.#{attribute}"
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end
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defaults << :"#{attributes_scope}.#{namespace}.#{attribute}"
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else
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defaults = lookup_ancestors.map do |klass|
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:"#{attributes_scope}.#{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.delete(:default) if options[:default]
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defaults << attribute.humanize
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options[:default] = defaults
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I18n.translate(defaults.shift, options)
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end
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end
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end
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