Option to use meta data from headers

[DylanGuedes]

Hi,

I'm trying to consume an API that maintains meta-data like 'totalPages', 'currentPage', 'totalEntries' via the response header, instead of the response body. Any possibility to also work on headers? :/

[hhff]

Hi @DylanGuedes ! I'm not too sure how you'd do this, but it's outside of the scope of Ember Infinity - Ember Data doesn't let headers get back to the App code.

I'd instead take a look at the serializer for your model, and perhaps "transform" the headers from the response into an entry on the model collection's meta.

[edprats]

i had a similar issue and here was my solution for future googlers.

place this in the corresponding adapter and you are good to go.

// adapters/foo.js
// this is for a RESTAdapter

handleResponse: function(status, headers, payload) {
    if (headers['X-Total']) {

      let meta = {
        'total': parseInt(headers['X-Total']),
        'total_pages': parseInt(headers['X-Total-Pages']),
        'per_page': parseInt(headers['X-Per-Page']),
        'starting_page': headers['X-Starting-Page'],
        'page': parseInt(headers['X-Page'])
      };

      payload.meta = meta;
    }

    return this._super(status, headers, payload);
  }

now a word to the wise as a follow up.

these 'custom headers' you will be using for ember infinity will not appear as visible 'headers' by default. you will need to have your backend response header allow for it in order for ember to see them.

in the case of the snippet posted above the response header also should also include
Access-Control-Expose-Headers:X-Total, X-Per-Page, X-Page, X-Total-Pages, X-Starting-Page

see this for details:
http://stackoverflow.com/questions/37505086/how-to-view-all-response-headers-in-ember-with-restadapter

[hhff]

+1 to @edprats solution - I've actually used that in the past :)