Employing jq to transfer the value of a child property to the parent dictionary

My TopoJSON file contains multiple geometries, structured as follows:

{
  "type": "Topology",
  "objects": {
    "delegaciones": {
      "geometries": [
        {
          "properties": {
            "name": "Tlalpan",
            "municip": "012",
            "id": "09012",
            "state": "09"
          }
...

I am looking to extract the id field from the properties, and assign it to the parent object. The desired result is:

{
  "type": "Topology",
  "objects": {
    "delegaciones": {
      "geometries": [
        {
          "id": "09012",
          "properties": {
            "name": "Tlalpan",
            "municip": "012",
            "id": "09012", // <-- It's okay if it's removed or not
            "state": "09"
          }
...

I attempted the following assignment using jq, but it was unsuccessful:

jq '.objects.delegaciones.geometries[].id = .objects.delegaciones.geometries[].properties.id' topo_df.json

Does anyone know how to iterate elements one by one in jq? Or any alternative method to achieve this task?

javascriptjsonjq

Answer №1

Here is the solution that includes the addition of the "id" property:

.objects.delegaciones.geometries[] |= (.id = .properties.id)

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