Module: ActiveRecordPostgresEarthdistance::QueryMethods

Defined in:
lib/activerecord-postgres-earthdistance/acts_as_geolocated.rb

Instance Method Summary collapse

Instance Method Details

#selecting_distance_from(lat, lng, name = "distance", include_default_columns = true) ⇒ Object 



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# File 'lib/activerecord-postgres-earthdistance/acts_as_geolocated.rb', line 93

def selecting_distance_from(lat, lng, name = "distance", include_default_columns = true)
  clone.tap do |relation|
    relation.joins!(through_table)
    values = []
    if relation.select_values.empty? && include_default_columns
      values << relation.arel_table[Arel.star]
    end
    distances = Utils.earth_distance(through_table_klass, lat, lng, name)
    distances = Arel::Nodes::Multiplication.new(
      Utils.quote_value(1 / MILES_TO_METERS_FACTOR), distances
    ) if relation.distance_unit === :miles

    values << distances

    relation.select_values = values
  end
end