Question

I am trying to post coordinates for origin and destination to bing api for getting directions. But I am unable to send the data.

 def get_info_from_bing(params)
    base_url="http://dev.virtualearth.net/REST/v1/Routes/"
    query_params = "?" + {
            "wayPoint.1" => params[:origin],
            "waypoint.2" => params[:destination],
            "dateTime" => params[:time] || Time.now.strftime("%H:%M"),
            "timeType" => "Arrival",
            "key" => ENV['BING_KEY']
    }.map {|k,v| "#{k}=#{CGI.escape(v)}"}*"&"
    modes=%w{driving walking transit}

Error:

NoMethodError - undefined method `gsub' for nil:NilClass:
/Users/anirvan/.rvm/rubies/ruby-1.9.2-p318/lib/ruby/1.9.1/cgi/util.rb:7:in `escape'
/Users/anirvan/codeforamerica-transpochoices-1ccac48/choices.rb:15:in `block in get_info_from_bing'
/Users/anirvan/codeforamerica-transpochoices-1ccac48/choices.rb:15:in `each'
/Users/anirvan/codeforamerica-transpochoices-1ccac48/choices.rb:15:in `map'
/Users/anirvan/codeforamerica-transpochoices-1ccac48/choices.rb:15:in `get_info_from_bing'
/Users/anirvan/codeforamerica-transpochoices-1ccac48/choices.rb:120:in `block in <top (required)>'
/Users/anirvan/.rvm/gems/ruby-1.9.2-p318/gems/sinatra-1.3.1/lib/sinatra/base.rb:1212:in `call'
/Users/anirvan/.rvm/gems/ruby-1.9.2-p318/gems/sinatra-1.3.1/lib/sinatra/base.rb:1212:in `block in compile!'
/Users/anirvan/.rvm/gems/ruby-1.9.2-p318/gems/sinatra-1.3.1/lib/sinatra/base.rb:772:in `[]'
/Users/anirvan/.rvm/gems/ruby-1.9.2-p318/gems/sinatra-1.3.1/lib/sinatra/base.rb:772:in `block (3 levels) in route!'

I am new to sinatra and ruby. Does anyone know what the problem is?

Answer 1

Use params.inspect to print the content of your param array. One of the values is certainly nil, that why CGI.escape(v) throws an exception.

If you can fix the nil value, use the following line as a workaround:

...
}.map {|k,v| "#{k}=#{CGI.escape(v||'')}"}*"&"
...