Hello, I want to do a simple json request. But it fails all time with this:

Bad Request

<function className at 0x7fcb5df30aa0>, /test/some_json: Function declared as capable of handling request of type 'json' but called with a request of type 'http'

My code looks like this:

from openerp import SUPERUSER_ID
from openerp import http
from openerp.http import request
import openerp
import json


class MyController(http.Controller):

    @http.route('/test/some_json', type="json", auth="public", website=True)
    def some_jsons(self):
        return [{"sample_dictionary": "This is a sample JSON dictionary"}]

what is wrong here? I have no javascript in my module. 

thanks