def populate_participant(index, reg_model, data):
index_suffix = "-{i}".format(i=index)
form_keys = [key for key in data if key.endswith(index_suffix)]
model = Participant()
for key in form_keys:
real_key = key.split('-')[0]
setattr(model, real_key, data[key])
if reg_model:
model.registration = reg_model
model.conference_dinner = model.conference_dinner == "on"
model.ride_from_helsinki = model.ride_from_helsinki == "on"
model.ride_from_tampere = model.ride_from_tampere == "on"
return model
