[Elm] import 'Data.List_' not used, but causing an error

[Stealthmate]

Description

I'm generating an API from haskell's servant-swagger, where an endpoint returns a type QueryResponse which is an object with two array fields.
The output file for this a module Data.QueryResponse, which has the import line

import Data.List_ as List_ exposing (List_)

however, List_ is not used anywhere in the file. On top of that, Elm doesn't recognize any module like that, and from what I've found there isn't one.

openapi-generator version

3.3.2, built from source from current master

OpenAPI declaration file content or url

gist

Command line used for generation

openapi-generator-cli.sh generate -i "http://localhost:8080/swagger.json" -l elm -o ./api

Steps to reproduce

Just execute the above command on a host that serves the file

Related issues/PRs

I tried looking for similar issues, but didn't find anything.

Suggest a fix/enhancement

I'm not really sure, but I think just simply not importing List_ would do the trick.

[Stealthmate]

I noticed some other problems.

• The API returns [[string]], however the template generated is for List String (the data field)
• The encoder/decoder functions use String.encoder / String.decoder respectively, however those don't exist.

Here's a gist of the code as well.

I think nested list generation may not be working properly. I'll try to do some more research during the week if I have time.

[eriktim]

Thanks for your report @Stealthmate. List_ is indeed a bug as nested Lists/Dicts were not yet supported. See the PR for a fix for both.

[Stealthmate]

@trenneman Thank you! I'll take a look!