Question

So i am trying to re-organise some data from the Google Places API, currently it comes out of their API like this:

{"results"=> [
             {"geometry"=>{"location"=>{"lat"=>51.503815, "lng"=>-0.11007}}, "icon"=>"http://maps.gstatic.com/mapfiles/place_api/icons/restaurant-71.png", "id"=>"5f212d158f4181db3ac0619fb3c52f36d4e276c2", "name"=>"Madeira Cafe", "reference"=>"CnRjAAAApaZWmTl5wOMtW49q3D1BLKAJ_M8lmZxaD6_-AU92qWfVZdokfTWOzlp5En_r9hSUHx-EeP71hzH7iDPYAGPtiqEAXvT4WcI3xlc5XUivenbQLw0j5MHW-ErL-Hbk4xB_by0OSsXCz9etNgkjbp0QCRIQ82Dgj-I3DAJqr7I3EwsFEhoUm2RXf2rCFlSuhfKjSsPuWKA2VGA",     {"results"=> [{"geometry"=>{"location"=>{"lat"=>51.503815, "lng"=>-0.11007}},
              "icon"=>"http://maps.gstatic.com/mapfiles/place_api/icons/restaurant-71.png",
              "id"=>"11111111",
              "name"=>"Madeira Cafe",
              "reference"=>"xxxxx",
              "types"=>["restaurant", "food", "establishment"],
              "vicinity"=>"London"}]}

The results get put into a hash with one key value – "results"

The rest of the data is the nested inside (i think) with "geometry" being the first of each record.

What I am trying to get to is a neat Hash that has one ID per place, with Lat / Lng and Name stored… so it can be stored and queried.

I have tried something like this:

results_hash = {}
result.each do |geometry, location, id|
  results_hash[id] = geometry
end

p results_hash  

but I can’t get it to work… it always outputs nil or just the same hash?

I hope this makes sense, as usual if someone just says “read this” its still a great help.

Thanks!

Charlie

Answer 1

Sounds like you want this:

results_hash = result["results"].inject({}) { |h, res| h[res["id"]] = res["geometry"]; h }

This gives you the following hash (printed with awesome_print):

{
    "2d48a3306535b60663645323cdf972c320da8b9d" => {
        "location" => {
            "lng" => -0.114522,
            "lat" => 51.502653
        }
    },
    "5f212d158f4181db3ac0619fb3c52f36d4e276c2" => {
        "location" => {
            "lng" => -0.11007,
            "lat" => 51.503815
        }
    }
}

You’d probably want to format it slightly nicer:

results_hash = result["results"].inject({}) do |h, res| 
  h[res["id"]] = res["geometry"]
  h
end

Or if you are using 1.9:

results_hash = result["results"].each_with_object({}) do |res, h| 
  h[res["id"]] = res["geometry"]
end