Accessing Values in Deeply Nested Array - Ruby on Rails - ruby-on-rails

Question

I am using an API call which returns a JSON response. I want to access the data inside the response so I can create some nice display cards showing the info and pictures. Here is a snippet from the response, the response property is populated with about 20 objects I'll include just two for brevity:
{
"success": true,
"message": "",
"result": [
{
"MarketCurrency": "LTC",
"BaseCurrency": "BTC",
"MarketCurrencyLong": "Litecoin",
"BaseCurrencyLong": "Bitcoin",
"MinTradeSize": 1e-8,
"MarketName": "BTC-LTC",
"IsActive": true,
"Created": "2014-02-13T00:00:00",
"Notice": null,
"IsSponsored": null,
"LogoUrl": "https://i.imgur.com/R29q3dD.png"
},
{
"MarketCurrency": "DOGE",
"BaseCurrency": "BTC",
"MarketCurrencyLong": "Dogecoin",
"BaseCurrencyLong": "Bitcoin",
"MinTradeSize": 1e-8,
"MarketName": "BTC-DOGE",
"IsActive": true,
"Created": "2014-02-13T00:00:00",
"Notice": null,
"IsSponsored": null,
"LogoUrl": "https://i.imgur.com/e1RS4Hn.png"
},
In my Rails controller I'm using JSON.parse and I'm trying to turn it into an object with the Open struct option:
#markets = JSON.parse(markets.to_json, object_class: OpenStruct)
In my view I'll do this <%=#markets.class%> and it shows Array and not object. So I try this <%=#markets.size%> and it shows 1. If I do <%=#markets[0]['success']%> I would expect it to return true but it returns 'success'. So, I'm not understanding why the ostruct library isn't working like I would expect or how I can get to the objects stored in the result array. Any help is greatly appreciated!

Answer 1

You already have a JSON response, isn't needed to use to_json again, try just parsing that object, and then use the dot . to access its fields, as an OpenStruct object now then you can access them as methods:
require 'json'
a = '{
"success": true,
"message": "",
"result": [{
"MarketCurrency": "LTC",
"BaseCurrency": "BTC",
"MarketCurrencyLong": "Litecoin",
"BaseCurrencyLong": "Bitcoin",
"MinTradeSize": 1e-8,
"MarketName": "BTC-LTC",
"IsActive": true,
"Created": "2014-02-13T00:00:00",
"Notice": null,
"IsSponsored": null,
"LogoUrl": "https://i.imgur.com/R29q3dD.png"
}, {
"MarketCurrency": "DOGE",
"BaseCurrency": "BTC",
"MarketCurrencyLong": "Dogecoin",
"BaseCurrencyLong": "Bitcoin",
"MinTradeSize": 1e-8,
"MarketName": "BTC-DOGE",
"IsActive": true,
"Created": "2014-02-13T00:00:00",
"Notice": null,
"IsSponsored": null,
"LogoUrl": "https://i.imgur.com/e1RS4Hn.png"
}]
}'
b = JSON.parse(a, object_class: OpenStruct)
p b.success
# => true

Answer 2

After much debugging and some assistance, I was able to get it to work. The response from the API call was an array with one item. The item was a long string of the entire dataset.
In order to get the expected behavior of "true" when calling #markets.success, I first had to
raw_markets = JSON.parse(markets.to_json)
followed by
#markets = raw_markets.map do |market|
JSON.parse(market, object_class: OpenStruct)
Note: the variable markets holds the original api call:
markets = open('url-to-api')
After this I would get #markets.success = "true" and #markets.result[0] held the first result, #markets.result[1] held the second result, and so on.