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How to extract values from string in Ruby on Rails

Posted on 2014-01-18
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Last Modified: 2014-01-21
I'm a novice trying to extract the latitude and longitude values (under geometry > location) from the attached JSON.

I tried to use this legacy code without success:
   
    results_array = ActiveSupport::JSON.decode response.body

    if results_array && "OK" == results_array["status"]      
      results_array["results"].each do |result|
        puts logger.info lat = result["geometry"]["location"]["lat"]
   
    end

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I figured out how to convert to key-value pairs with:
response_2 = JSON.parse(response.body)

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...But still couldn't figure out how to extract the latitude and longitude.

I thought this would be obvious, but didn't find the solution through googling. Thanks a lot for your help.
JSON-text.txt
JSON-text-as-key-value-pairs.txt
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Question by:bishop3000
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Andrew Doades earned 500 total points
ID: 39791993
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Author Comment

by:bishop3000
ID: 39798231
Thanks doades, the link got me on the right track.

Here's what I ended up with, which works.

  def get_site_geocoordinates  # Bishop 2014.01.18
    
    geocoder_url = "http://maps.googleapis.com/maps/api/geocode/json?sensor=false&address="

    url = geocoder_url + ERB::Util.url_encode( params[:site_address] )
    uri = URI.parse(url)

    response = Net::HTTP.get_response(uri)
    
    geo_text = JSON.parse(response.body)
    


    response_text = ""

    if geo_text && "OK" == geo_text["status"]
      geo_text["results"].each do |result|
        response_text = "Latitude,\"#{result["geometry"]["location"]["lat"]}\"\n"   # entry["geometry"]["location"]["lat"].to_s
        response_text += "Longitude,\"#{result["geometry"]["location"]["lng"]}\"\n"
      end
    else
      response_text = "SiteAddress,\"0\"\n"
    end


    render :text => response_text, :content_type => "text/plain" 
  
  end

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LVL 10

Expert Comment

by:Andrew Doades
ID: 39798237
You're welcome, glad it helped you out :)
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