Fix serialised JSON representation of owner polymorphic links

[camallen]

As the owner relationship is polymorphic and RestPack Serializer doesn't embed the resource class context the owner routes will be useless.

I've got a PR with RestPack serializer but haven't gotten around to implementing anyting there.

My plan is to introspect on the belongs_to association and if it's polymorphic then represent this link as a resource object (note the href override link), e.g.

{
  "id": "1",
  "links": {
    "owner": {
      "href": "http://api.panoptes.org/api/groups/17",
      "id": "17",
      "type": "user_group"
    }
  }
}

[edpaget]

That looks good to me.

[camallen]

We may not need this since ff23af61bfe62d81b028b6a0f9d9cad2e4636623 - added the owner_name attribute to User and UserGroup serializers. Perhaps we just don't expose the OwnerName relationship on the Namebale models to avoid this issue.

I do think it would be good to contribute back to RestpackSerialzer though.

[edpaget]

So that commit is merged is it okay to close this?

[camallen]

Yeah - I don't think we need to expose the polymorphic owner_name relationship in our serialized models via RestPack.

If we do i'll reopen and fix it.