How to combine 2 JSON objects into one with jq?

Question

I have two JSON objects in two files (result_0.json and result_1.json) which look like this

{ "data": { "pools": [ { "id": "1" }, { "id": "2" } ] } }

and like this:

{ "data": { "pools": [ { "id": "3" }, { "id": "4" } ] } }

What I would like to get looks like this:

{ "data": { "pools": [ { "id": "1" }, { "id": "2" }, { "id": "3" }, { "id": "4" } ] } }

How can it be done? I tried

jq -s add result_0.json result_1.json

but it just overwrites the values in result_0.json with the values of result_1.json.

0stone0 · Accepted Answer · 2021-12-15 15:02:33Z

If .data and .pool are the only keys in the json files, you can use

jq -n '{ data: { pools: [inputs.data.pools] | add } }' result0 result1

This will create the desired output:

{ "data": { "pools": [ { "id": "1" }, { "id": "2" }, { "id": "3" }, { "id": "4" } ] } }

Regarding the inputs keyword, consider reading JQ's docs on this part.

1 Answer 1