putting a hash value into an array in ruby - arrays

Question

I am trying to insert a list of account numbers into an array from an json return, I turned the json return into an hash, but I cannot for some reason insert the values into an array. I checked the hash locations on irb, and it gets the account number, for an example the location my_hash["aws_accounts"][0]["owner_id"] will get me the first account number and my_hash["aws_accounts"][0]["status"]["level"] will get me the status of the first account.
I essentially want to iterate through all the accounts and store the account number if its respective status color is "yellow".
HERE IS MY CODE:
require 'json'
require 'rest-client'
j = RestClient.get 'https://chapi.cloudhealthtech.com/v1/aws_accounts?api_key=###&page=1&per_page=100'
my_hash = JSON.parse(j)
accnt_size = my_hash["aws_accounts"].size
intaccntsize = accnt_size.to_i
account_number_array = Array.new
x = 0
for accnt_iteration in x..intaccntsize do
puts accnt_iteration
if my_hash["aws_accounts"][accnt_iteration]["status"]["level"] == "yellow"
account_number_array.push(my_hash["aws_accounts"][accnt_iteration]["owner_id"])
end
end
HERE IS THE ERROR MESSAGE
in `block in <main>': undefined method `[]' for nil:NilClass (NoMethodError)
from C:/Users/----/Desktop/-----/ruby_aws_sdk.rb:12:in `each'
from C:/Users/------/Desktop/-------/ruby_aws_sdk.rb:12:in `<main>'
any suggestions will help. thanks.

Answer 1

The actual solution to your problem is to use the 3 dot range instead of 2 dot (3 dots is end-exclusive and 2 dots is end-inclusive) as seen in the following (this uses the same my_hash as my second code block below):
for x in 0..my_hash["aws_accounts"].size do
puts x
end
# 0
# 1
# 2
=> 0..2
my_hash["aws_accounts"][2]
=> nil
for x in 0...my_hash["aws_accounts"].size do
puts x
end
# 0
# 1
=> 0...2
my_hash["aws_accounts"][1]
=> {"owner_id"=>2, "status"=>{"level"=>"orange"}}
Instead of getting the number of accounts and trying to access them through their index, I would just iterate over the accounts on their own. Here's a quick sample, with what I believe (based on your description) are the relevant pieces of my_hash and your expected output.
my_hash = {
"aws_accounts" => [
{ "owner_id" => 1, "status" => { "level" => "yellow" } },
{ "owner_id" => 2, "status" => { "level" => "orange" } }
]
}
account_number_array = []
my_hash["aws_accounts"].each do |account|
if account["status"]["level"] == "yellow"
account_number_array << account["owner_id"]
end
end
puts account_number_array.inspect
# => [1]