Car geojson example

cars_controller.rb

class CarsController < ApplicationController
  def index
    @cars = Car.all
    
    render json: cars_to_geojson(@cars)
  end
  
  private
  
  def cars_to_geojson(cars)
     {
      type: :FeatureCollection,
      features: cars.map do |car|
        {
          type: :Feature,
          geometry: {
            type: :Point,
            coordinates: [
              car.lon,
              car.lat,
            ],
          },
          properties: {
            title: car.title,
            id: car.id,
          },
        }
      end,
    }
  end
end