Ember 2, Show a single loading message when the ids where included in the original response

Ok, thanks. But I already have included my comments in GET response for category, like this:

{
  "data": {
    "id": "1",
    "type": "categories",
    "attributes": {
      "name": "Book"
    },
    "relationships": {
      "posts": {
        "data": [{
          "id": "11",
          "type": "posts"
        }, {
          "id": "14",
          "type": "posts"
        }, {
          "id": "16",
          "type": "posts"
        }]
      }
    }
  },
  "included": [{
    "id": "11",
    "type": "posts",
    "attributes": {
      "style": false,
      "comments": true
    }
  }, {
    "id": "14",
    "type": "posts",
    "attributes": {
      "style": true,
      "comments": false
    }
  }, {
    "id": "16",
    "type": "posts",
    "attributes": {
      "style": true,
      "comments": false
    }
  }]
}

I think all this is not working the way I want maybe because of this (javascript - Ember 2, Strange behaviour with isPending, isSettled, isFulfilled when using included relationships in API response - Stack Overflow).

SHORTLY:

I don’t want many many many HTTP requests. Just one for category (model) and one (non blocking, with loading message) for posts (after the first one for model: category)…