Ruby on Rails

Please how can i loop this to have all values of _id, contact, sent,
answer, repondant?

{
"result" : [
{
"_id" : null,
"contact" : 45684,
"sent" : 0,
"answer" : 0,
"repondant" : 0
},
{
"_id" : "vms",
"contact" : 6340,
"sent" : 6340,
"answer" : 0,
"repondant" : 0
},
{
"_id" : "sms",
"contact" : 27356,
"sent" : 41344,
"answer" : 0,
"repondant" : 0
}
],
"ok" : 1
}


Thank you very much

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