How to take that data from api and write a function - ruby

Question

Okay, it's been many days. I have been going back and forth with this api, and would like to get the following results.
Here is the problem.
uri = URI('https://api.wmata.com/StationPrediction.svc/json/GetPrediction/All')
uri.query = URI.encode_www_form({'api_key' => 'ihaveit',})
request = Net::HTTP::Get.new(uri.request_uri)
#response = Net::HTTP.start(uri.host, uri.port, :use_ssl => uri.scheme == 'https') do |http|
http.request(request)
#data = JSON.parse #response.body
Now i've the #data parsed as JSON. I am trying to write a class Trains and use the following data.
{
"Car": "6",
"Destination": "SilvrSpg",
"DestinationCode": "B08",
"DestinationName": "Silver Spring",
"Group": "1",
"Line": "RD",
"LocationCode": "A01",
"LocationName": "Metro Center",
"Min": "3"
},
Here is the code for class Trains
class Trains
def initialize(car, destination, destinationcode, destinationname, group, line, locationcode, locationname)
#car = car
#destination = destination
#destinationcode = destinationcode
#destinationname = destinationname
#group = group
#line = locationcode
#locationname = locationname
end
And now im stuck about the next step. I am totally new to api. I can write the following for a static class.
def to_s
puts(#car + #destination + #destinationcode + #destinationname + #group + #line + #locationname)
end
= Trains.new
puts Train
end
I've got this so far.
class TrainLoader < Struct.new(:car, :destination, :destinationcode, :destinationname, :group, :line, :locationcode, :locationname)
class Trains
end
t = Trains.new(#data["Car"],#data["DestinationCode"], #data[DestinationName],#data[Group],#data[Line], #data[LocationCode], #data[LocationName], #data[Min])

Answer 1

You already have a class, just write a to_s funtcion:
class Trains
def initialize(car, destination, destinationcode, destinationname, group, line, locationcode, locationname)
#car = car
#destination = destination
#destinationcode = destinationcode
#destinationname = destinationname
#group = group
#line = locationcode
#locationname = locationname
end
# inspect attributes with own `to_s` method
def to_s
"#{#car} #{#destination} #{#destinationcode} #{#destinationname}"
end
end
Now create an instance of your class:
>> train = Trains.new(#data["Car"], #data["Destination"], #data["DestinationCode"])..
>> train.to_s
But i can suggest you a more elegant solution, with struct:
>> data = {
?> "Car": "6",
?> "Destination": "SilvrSpg",
?> "DestinationCode": "B08",
?> "DestinationName": "Silver Spring",
?> "Group": "1",
?> "Line": "RD",
?> "LocationCode": "A01",
?> "LocationName": "Metro Center",
?> "Min": "3"
>> }
>> class Trains < Struct.new(*data.keys)
#> # create a struct with attributes like keys in data hash `"Cat"` or `"Min"`
>> end
>> t = Trains.new(*data.values)
# create instance of Trains class with values from a data hash `"6"`
=> #<struct Trains Car="6", Destination="SilvrSpg", DestinationCode="B08", DestinationName="Silver Spring", Group="1", Line="RD", LocationCode="A01", LocationName="Metro Center", Min="3">
>> t.Car
=> "6"
>>