Ember model hooking with data received as JSON with REST

I'm really new to ember and I'm trying to send a JSON data with my REST backend (I'm using Django REST framework with Django JSON API), but I'm getting some weird errors.

Error:

1)Error while processing route: sampledata.index serializer.normalizeResponse is not a function
normalizeResponseHelper@http://localhost:4200/assets/vendor.js:77763:30....

2)normalizeResponseHelper@http://localhost:4200/assets/vendor.js:77763:30
 _findAll/</<@http://localhost:4200/assets/vendor.js:77625:24
 Backburner.prototype.run@http://localhost:4200/assets/vendor.js:10805:18....

My data sent is:

{
    "links": {
        "first": "http://localhost:8000/api/sampledata?page=1",
        "last": "http://localhost:8000/api/sampledata?page=1",
        "next": null,
        "prev": null
    },
    "data": [{
        "type": "sampledata",
        "id": "4",
        "attributes": {
            "blind_id": "1-146788",
            "aliquots_circulation": 9,
            "total_dna": 120,
            "data_type": "WES"
        },
        "relationships": {
            "projects": {
                "data": [],
                "meta": {
                    "count": 0
                }
            }
        }
    }],
    "meta": {
        "pagination": {
            "page": 1,
            "pages": 1,
            "count": 1
        }
    }
}

My ember model (/app/models/sampledata.js):

import DS from 'ember-data';

export default DS.Model.extend({
  blind_ID: DS.attr('string'),
  aliquotsCirculation: DS.attr('number'),
  totalDna: DS.attr('number'),
  dataType: DS.attr('string'),
  projects: DS.hasMany('project')
});

My adapter (/app/adapters/application.js):

import DS from 'ember-data';
import ENV from 'frontend/config/environment';

export default DS.JSONAPIAdapter.extend({
  host: ENV.host,
  namespace: 'api'
});

My serializer (/app/serializers/application.js)

import DS from 'ember-data';

export default DS.JSONAPIAdapter.extend({

});

If I change my serializer to

export default DS.RESTSerializer.extend({
  primaryKey: '_id',
  serializeId: function(id) {
    return id.toString();
  }
});

I get the following WARNINGS and NO ERRORS, but no data is shown:

WARNING: Encountered "links" in payload, but no model was found for model name "link" (resolved model name using frontend@serializer:application:.modelNameFromPayloadKey("links"))
vendor.js (line 16826)
WARNING: Encountered "data" in payload, but no model was found for model name "datum" (resolved model name using frontend@serializer:application:.modelNameFromPayloadKey("data"))