append values of objects inside array using jq

Question

I have an object which has an array of objects. I am willing to append two properties of each object inside the array and create a new key out of that. I am new to JQ and have tried various ways to do this, but not able to figure out. Need help.

Input:

{
  "name": "Toyota",
  "Model": "Innova",
  "Details": [
    {
      "entry_day": "23",
      "entry_month": "May"
    },
    {
      "entry_day": "01",
      "entry_month": "Jan"
    }
  ]
}

Output I expect:

{
    "name": "Toyota",
    "Model": "Innova",  
    "Details": [
        {
            "entry_date": "23 May"
        },
        {
            "entry_date": "01 Jan"
        }
    ]
}

your json is invalid: Jan and May should be in double quotes — RomanPerekhrest
– RomanPerekhrest, Commented Jun 1, 2017 at 9:11

hek2mgl · Accepted Answer · 2017-06-01 09:18:26Z

5

You need to use the update assignment operator |=:

jq '(.Details[]|={entry_date:"\(.entry_day) \(.entry_month)"})' input.json

answered Jun 1, 2017 at 9:18

hek2mgl

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