resas-apiから都道府県・市区町村データを取得するrakeタスク

resas_api.rake

require 'net/http'
require 'json'
require 'uri'

namespace :resas_api do

  desc "get pref data from resas-api"
  task get_prefecture: :environment do
    API_URL = 'https://opendata.resas-portal.go.jp/api/v1/prefectures'
    json = get_data(API_URL)

    json['result'].each do |pref_data|
      Prefecture.create({pref_code: pref_data["prefCode"], pref_name: pref_data["prefName"]})
    end
  end

  desc "get city data from resas-api"
  task get_city: :environment do
    API_URL = 'https://opendata.resas-portal.go.jp/api/v1/cities?prefCode='

    Prefecture.all.each do |pref|
      json = get_data("#{API_URL}#{pref.pref_code}")

      json['result'].each do |city_data|
        City.create({
          pref_code: city_data['prefCode'],
          city_code: city_data['cityCode'],
          city_name: city_data['cityName'],
          big_city_flag: city_data['bigCityFlag']
        })
      end
    end
  end

  def get_data(url)
    pp "URL : #{url}"
    uri = URI(url)
    req = Net::HTTP::Get.new(uri)
    req['X-API-KEY'] = 'APIキー'

    res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: uri.scheme == 'https') {|http|
      http.request(req)
    }

    JSON.parse(res.body)
  end

end