'Speaker will be saved to database with proper Event id
:param no_name:
:param user:
:param request: view data form
:param event_id: Speaker belongs to Event by event id'

@staticmethod
def add_speaker_to_event(request, event_id, user=login.current_user, no_name=False):

    speaker = Speaker.query.filter_by(email=request.form.get('email', '')).filter_by(event_id=event_id).first()
    speaker = save_speaker(request, event_id=event_id, speaker=speaker, user=user, no_name=no_name)
    update_version(event_id, False, 'speakers_ver')
