small refactorings

golem_activity_registration_slot/models/__init__.py

@@ -16,4 +16,4 @@
 #    You should have received a copy of the GNU Affero General Public License
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from . import golem_activity, golem_activity_registration_slot
+from . import golem_activity, golem_activity_registration_slot, golem_activity_registration

golem_activity_registration_slot/models/golem_activity.py

@@ -29,3 +29,5 @@ class GolemActivity(models.Model):
     slots_duration = fields.Float(string='Registration Slot Duration')
     registration_slot_ids = fields.One2many('golem.activity.registration.slot', 'activity_id',
                                             string='Registration Slots')
+
+    #@api.constrains('slots_number', 'slots_duration')