request url: http://localhost:8000/myapp/comment/comment/?format=json&note=1&limit=3

comment.json

{
    "meta": {
        "limit": 3,
        "next": "/myapp/comment/comment/?note=1&offset=3&limit=3&format=json",
        "offset": 0,
        "previous": null,
        "total_count": 4
    },
    "objects": [
        {
            "content": "comment 1",
            "id": "1",
            "note": "/myapp/note/note/1/",
            "resource_uri": "/myapp/comment/comment/1/"
        },
        {
            "content": "comment 3",
            "id": "3",
            "note": "/myapp/note/note/1/",
            "resource_uri": "/myapp/comment/comment/3/"
        },
        {
            "content": "comment 4",
            "id": "4",
            "note": "/myapp/note/note/1/",
            "resource_uri": "/myapp/comment/comment/4/"
        }
    ]
}

views.py

from tastypie import fields
from tastypie.resources import ModelResource, ALL
from myapp.models import Note, Comment

class NoteResource(ModelResource):
    comments = fields.ToManyField('myapp.views.CommentResource',
            'comments', full=True)

    class Meta:
        queryset = Note.objects.all()


class CommentResource(ModelResource):
    note = fields.ToOneField(NoteResource, 'note')

    class Meta:
        queryset = Comment.objects.all()
        filtering = {'note': ALL}