Rails: JSON Parsing a URL for later use

Question

I'm trying to accomplish something really easily but I could not solve it to my beginner level in rails. The question is how do you assign a JSON objects attribute to a rails object.. I'm trying to send a request to Google Map's URL with some parameters. Without JSON parsing it works just fine, however when I try to parse it, I receive many errors. The regular JSON response from Google when I query the URL ([http://maps.googleapis.com/maps/api/directions/json?origin=40.983204,29.0216549&destination=40.99160908659266,29.02334690093994&sensor=false][1]) is like down below;

{
  "routes" : [
    {
      "bounds" : {
        "southwest" : {
          "lat" : 40.98289,
          "lng" : 29.02054
        },
        "northeast" : {
          "lat" : 40.99148,
          "lng" : 29.02388
        }
      },
      "summary" : "Mühürdar Cd",
      "waypoint_order" : [],
      "legs" : [
        {
          "start_location" : {
            "lat" : 40.98322,
            "lng" : 29.02166
          },
          "distance" : {
            "text" : "1.3 km",
            "value" : 1324
          },

And goes on.

The code I have to get the "summary" attribute is;

@request = Net::HTTP.get(URI.parse('http://maps.googleapis.com/maps/api/directions/json?origin=40.983204,29.0216549&destination=40.99160908659266,29.02334690093994&sensor=false'))
    @result=JSON.parse(@request)["routes"]["summary"]

I wanted to ask what would be the proper way for me to get the summary attribute from the response?

From the JSON you've posted, JSON.parse(@request)['routes'] returns an array. So basically, JSON.parse(@request)['routes'][1] should get you the summary. — membLoper
– membLoper, Commented Sep 14, 2012 at 10:17
Your method is perfectly fine but I have one more problem. I have written hash['routes'][0]['legs'][0]['duration'] and it gets to a point where I receive a JSON request like { "text" : "6 mins", "value" : 373 }. But I cannot reach neither text or value. What should I add to the end? — Ali
– Ali, Commented Sep 14, 2012 at 10:35
hash['routes'][0]['legs'][0]['duration']['text'] would allow you to access Text and ['routes'][0]['legs'][0]['duration']['value'] the Value. Just try 'routes'][0]['legs'][0]['duration'].class to see what type it is and access it accordingly. Cheers. — membLoper
– membLoper, Commented Sep 14, 2012 at 11:07
@membLoper I've figured it out by myself. But thanks for your valuable comment. — Ali
– Ali, Commented Sep 14, 2012 at 11:10

membLoper · Accepted Answer · 2013-10-03 10:36:29Z

1

hash['routes'][0]['legs'][0]['duration']['text']

would allow you to access Text and

hash['routes'][0]['legs'][0]['duration']['value']

the Value. Just try

hash['routes'][0]['legs'][0]['duration'].class

to see what type it is and access it accordingly

answered Oct 3, 2013 at 10:36

membLoper

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