Fix #3

теперь это работает
```python
form = {
    'center': 'Luberc',
    'name': 'Puskin Sasha',
    'types': [{'name': 'mrt_head'}, {'name': 'mrt_neck'}],
    'desc': 'The famous poet'
}

class MakeRecord(Record):

    def __init__(self, from_form):
        self.center = Center(name=from_form['center'])
        self.types = (Examination(name=typeof['name'])
                      for typeof in from_form['types'])
        self.patient = from_form['name']
        self.desc = from_form['desc']

seance_1 = MakeRecord(form)
db.insert(seance_1)
```