How to return dynamic json?

[steel magnet]

I'm trying to return some json with wisp, but the field called "item" is dynamic and could be anything and is of type a. How do I pass it as a dynamic type here?

 let result = {
        let res_items =
          json.array(items, fn(tag) {
            json.object([
              // something like json.dynamic here
              #("item", json.string(tag.item)),
              #("tag", json.int(tag.tag)),
            ])
          })

        Ok(json.to_string_builder(res_items))
      }

      wisp.json_response(result, 201)

[arctic herald]

You can't have json.dynamic because we need to know how to format it as JSON

Dynamic could be anything, including lots of things that are not valid JSON

for example, it could be a database connection

There's no way to turn that into JSON

[steel magnet]

Makes sense, so instead I need to map all cases to decode them correctly right?

[arctic herald]

That sounds good to me

[echo shard]

Could gleam/json provide an utility to do so?

Like a function that guarantees it's valid json, but returns a dynamic?

[arctic herald]

That's would be a very bad idea

You should never represent things with Dynamic but attempt to guarentee it is something specific

That is going out of your way to avoid the type system

If you want to do dynamically typed programming you should use Erlang and not Gleam

As Gleam is terrible at untyped programming!

[echo shard]

Uhm, that's true