Json-server: DELETE doesn't adhere to routes

[schtauffen]

I have db.json:

{
  "posts": [{ id: 1, title: "My Awesome Post", key: "myawesomepost" }]
}

and routes.json:

{
  "/posts/:key": "/posts?key=:key"
}

GET /posts/myawesomepost

works and I receive the result

DELETE /posts/myawesomepost

returns a 404

[schtauffen]

I realize now that /posts/1 would normally return a single result {...} where /posts?key=myawesomepost is going to return an array of results [{...}].

Is there a simple way to make DELETE work on a non-id property or must one use a middleware?