Get values from JSON in Ruby - ruby-on-rails

Question

I am trying to get the VolumeId and State of the Volume attached to the machines using aws API .
Code
#!/usr/local/bin/ruby
require "aws-sdk"
require "rubygems"
list=Aws::EC2::Client.new(region: "us-east-1")
volume=list.describe_volumes()
volumes=%x( aws ec2 describe-volumes --region='us-east-1' )
puts volumes
Below is the sample output of the command
aws ec2 describe-volumes --region='us-east-1' .
Please help to get VolumeID and state from the below
Sample Output of API(JSON):
{
"Volumes": [
{
"AvailabilityZone": "us-east-1d",
"Attachments": [
{
"AttachTime": "2015-02-02T07:31:36.000Z",
"InstanceId": "i-bca66353",
"VolumeId": "vol-892a2acd",
"State": "attached",
"DeleteOnTermination": true,
"Device": "/dev/sda1"
}
],
"Encrypted": false,
"VolumeType": "gp2",
"VolumeId": "vol-892a2acd",
"State": "in-use",
"Iops": 100,
"SnapshotId": "snap-df910966",
"CreateTime": "2015-02-02T07:31:36.380Z",
"Size": 8
},
]
}

Answer 1

for getting just the volume_ids ->
JSON.parse(volumes)['Volumes'].map{|v|v["VolumeId"]}
for getting just the states ->
JSON.parse(volumes)['Volumes'].map{|v|v["state"]}
for getting a hash/map with volume-ids as keys and their states as values ->
JSON.parse(volumes)['Volumes'].map{|v| [v["VolumeId"],v["state"]] }.to_h