Empty relationships should have data key with value null

[JakeDluhy]

Per spec: http://jsonapi.org/format/#document-resource-object-relationships A “relationship object” MUST contain at least one of the following: links, data, meta. Implementations I've seen in the past will have "posts": { "data": null } } within the relationships object if the relation doesn't exist/isn't provided.

However with schema like

module.exports = {
  whitelist:     ['name'],
  relationships: {
    players: { type: 'players' },
    turns:   { type: 'turns' },
    map:     { type: 'maps' },
  },
};

my json comes out like

{
    "jsonapi": {
        "version": "1.0"
    },
    "data": {
        "type": "campaigns",
        "id": "10",
        "attributes": {
            "name": "My New Campaign"
        },
        "relationships": {
            "players": {},
            "turns": {},
            "map": {}
        }
    }
}

I'm saying it should be like

"relationships": {
    "players": { "data": null },
    "turns": { "data": null },
    "map": { "data": null }
}

I looked through the source to see if I could make a PR but I couldn't find where this is happening... It seems like at the very least from https://github.com/danivek/json-api-serializer/blob/master/lib/JSONAPISerializer.js#L582 it should have data: undefined

[danivek]

You're right.
It's related to this commit: 12bc2cd

Return null instead of undefined will do the job i think.

[JakeDluhy]

Want me to make a PR for it?

[danivek]

fix in v1.10.1

Thanks