Python-сообщество

from elixir import *

class Place(Entity):
    title = Field(Unicode(50))
    alias = Field(Unicode(20))
    text = Field(UnicodeText)
    types = OneToMany('PlaceTypes')
    service = OneToMany('PlaceServices')
    photo = Field(Unicode(30))
    work_time = OneToMany('WorkTime')
    city = OneToOne('City')
    address = Field(Unicode(100))
    
    def __repr__(self):
    	return self.title

class PlaceTypes(Entity):
    alias = Field(Unicode(15))
    title = Field(Unicode(50))
    places = ManyToOne('Place')
    
    def __repr__(self):
    	return self.title

class PlaceServices(Entity):
    alias = Field(Unicode(15))
    title = Field(Unicode(50))
    places = ManyToOne('Place')
    
    def __repr__(self):
    	return self.title

class WorkTime(Entity):
    place = ManyToOne('Place')
    day = Field(Unicode(30))
    open_time = Field(Time)
    close_time = Field(Time)
    all_day = Field(Boolean)
    
    def __repr__(self):
    	return self.day

class City(Entity):
    alias = Field(Unicode(15))
    name = Field(Unicode(30))
    place = ManyToOne('Place')
    
    def __repr__(self):
    	return self.name