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Contents
require 'earth/rail/rail_fuel' CountryRailTractionClass.class_eval do data_miner do import "european rail traction class data from the UIC", :url => 'https://docs.google.com/spreadsheet/pub?key=0AoQJbWqPrREqdDBiV0VPdkg2UkNSV0pVdWNNcG9fMHc&output=csv' do key 'name', :synthesize => proc { |record| [record['country_iso_3166_code'], record['rail_traction_name'], record['rail_class_name']].join(' ') } store 'country_iso_3166_code' store 'rail_traction_name' store 'rail_class_name' store 'electricity_intensity', :nullify => true, :units_field_name => 'electricity_intensity_units' store 'diesel_intensity', :nullify => true, :units_field_name => 'diesel_intensity_units' store 'co2_emission_factor', :nullify => true, :units_field_name => 'co2_emission_factor_units' end process "Ensure RailFuel is populated" do RailFuel.run_data_miner! end process "Standardize diesel intensity units" do CountryRailTractionClass.where(:diesel_intensity_units => 'grams_per_passenger_kilometre').safe_find_each do |record| diesel = RailFuel.find_by_name("diesel") record.diesel_intensity = record.diesel_intensity.grams.to(:kilograms) / diesel.density record.diesel_intensity_units = [diesel.density_units.split("_per_")[1].pluralize, record.diesel_intensity_units.split("_per_")[1]].join('_per_') record.save! end end process "Standardize co2 emission factor units" do CountryRailTractionClass.where(:co2_emission_factor_units => 'grams_per_passenger_kilometre').safe_find_each do |record| record.co2_emission_factor = record.co2_emission_factor.grams.to(:kilograms) record.co2_emission_factor_units = ['kilograms', record.co2_emission_factor_units.split("_per_")[1]].join('_per_') record.save! end end end end
Version data entries
8 entries across 8 versions & 1 rubygems