how to select a json object where a child value array contains a certain propery

Question

I have an array of objects similar to the following:

[
  {
    "id": "one",
    "tags": {
      "my.key": "true"
    }
  },
  {
    "id": "two",
  }
]

How can I select all "id" values for each object containing a tag where "my.key" is "true"?

Answer 1

You can use a select with .tags["my.key"] == "true" and get only the id field :

jq '.[] | select(.tags["my.key"] == "true") | .id' data.json