gistfile1.py

from robottelo.api.apicrud import ApiCrud
from robottelo.common import records
from robottelo.records.operatingsystem import OperatingSystem


class ArchitectureApi(ApiCrud):
       api_path = "/api/architectures/"
       api_json_key = u"architecture"
       create_fields = ["name", "operatingsystem_ids"]

class Architecture(records.Record):
    name = records.StringField(required=True)
    operatingsystem = records.ManyRelatedField(OperatingSystem, 1, 3)

    class Meta:
        api_class = ArchitectureApi