Method: Netzke::DataMapper::Attributes#value_for_attribute

Defined in:
lib/netzke/data_mapper/attributes.rb

#value_for_attribute(a, through_association = false) ⇒ Object

Fetches the value specified by an (association) attribute If through_association is true, get the value of the association by provided method, not the associated record’s id E.g., author__name with through_association set to true may return “Vladimir Nabokov”, while with through_association set to false, it’ll return author_id for the current record



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# File 'lib/netzke/data_mapper/attributes.rb', line 192

def value_for_attribute(a, through_association = false)
  v = if a[:getter]
        a[:getter].call(self)
      elsif respond_to?("#{a[:name]}")
        send("#{a[:name]}")
      elsif is_association_attr?(a)
        split = a[:name].to_s.split(/\.|__/)
        assoc = self.class.relationships[split.first.to_sym]

        if through_association
          split.inject(self) do |r,m| # TODO: do we really need to descend deeper than 1 level?
            if r.respond_to?(m)
              r.send(m)
            else
              ::Rails.logger.debug "Netzke::Basepack: Wrong attribute name: #{a[:name]}" unless r.nil?
              nil
            end
          end
        else
          self.send assoc.child_key.first.name
        end
      end

  # a work-around for to_json not taking the current timezone into account when serializing ActiveSupport::TimeWithZone
  v = v.to_datetime.to_s(:db) if [ActiveSupport::TimeWithZone].include?(v.class)
  v = v.to_s(:db) if [DateTime, Date].include?(v.class)
  v
end