Contents

module ActiveRecordPostgresEarthdistance
  module ActsAsGeolocated
    extend ActiveSupport::Concern

    included do
    end

    module ClassMethods
      def acts_as_geolocated(options = {})
        cattr_accessor :latitude_column, :longitude_column
        self.latitude_column = options[:lat] || (column_names.include?("lat") ? "lat" : "latitude")
        self.longitude_column = options[:lng] || (column_names.include?("lng") ? "lng" : "longitude")
      end

      def within_radius radius, lat, lng
        where(["ll_to_earth(#{self.latitude_column}, #{self.longitude_column}) <@ earth_box(ll_to_earth(?, ?), ?)" +
               "AND earth_distance(ll_to_earth(#{self.latitude_column}, #{self.longitude_column}), ll_to_earth(?, ?)) <= ?",
               lat, lng, radius, lat, lng, radius])
      end

      def order_by_distance lat, lng, order: "ASC"
        order("earth_distance(ll_to_earth(#{self.latitude_column}, #{self.longitude_column}), ll_to_earth(#{lat}, #{lng})) #{order}")
      end

    end
  end
end

ActiveRecord::Base.send :include, ActiveRecordPostgresEarthdistance::ActsAsGeolocated

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
activerecord-postgres-earthdistance-0.3.0	lib/activerecord-postgres-earthdistance/acts_as_geolocated.rb