jq get values from complex object-CodePudding

I have an object that looks like this

{
  "my_list": [
    {
      "name": "an_image",
      "image": "an_image.com"
    },
    {
      "name": "another_image",
      "image": "another_image.com"
    },
  ...<more objects with image property>
  ],
  "foo": {
    "image": "foobar.io"
  },
  "bar": {
    "image": "bar_image.io"
  },
  ...<more objects with image property>
}

I'd like to get all of the image properties from each of the objects, and from each object in my_list and other lists that have objects that include an image property. So in this example I'd like to get

"an_image.com"
"another_image.com"
"foobar.io"
"bar_image.io"

We don't know the keys of any of these objects at runtime, so we can't reference my_list, foo, or bar in this example.

Previously we didn't have my_list in the object and jq '.[].image' worked, but now that results in jq: error (at bar.json:18): Cannot index array with string "image".

The problem is that we don't know the name of the objects that contain image properties so we can't reference them explicitly, and now that we've added another element that's a list we're running into type errors, that I'm not sure how to solve.

I've tried various combinations of .[].image, but they all seem to run into issues with typing.

CodePudding user response：

If you don't mind the terseness, you could perhaps go with:

jq '..|select(.image?).image'

CodePudding user response：

You could select by objects and items of arrays:

jq '.[] | ., arrays[] | objects.image'

"an_image.com"
"another_image.com"
"foobar.io"
"bar_image.io"

Demo