expomap/exposition/models.py

# -*- coding: utf-8 -*-
from django.db import models
from hvad.models import TranslatableModel, TranslatedFields, TranslationManager
#
from functions.custom_fields import EnumField

AUDIENCE1 = ((None,'Не выбрано'),
            ('experts', 'Специалисты'),
            ('experts and consumers', 'Специалисты и потребители'),
            ('general public', 'Широкая публика'))
AUDIENCE = (None,'experts', 'experts and consumers', 'general public')
CURRENCY = ('RUB', 'USD', 'EUR')


class ExpositionManager(TranslationManager):
    def safe_get(self, **kwargs):
        model = self.model
        try:
            return model.objects.get(**kwargs)
        except:
            return None

class Exposition(TranslatableModel):
    """
    Create Exposition model

    Uses hvad.TranslatableModel which is child of django.db.models class
    """
    #set manager of this model
    objects = ExpositionManager()

    url = models.SlugField(unique=True)
    data_begin = models.DateField(verbose_name='Дата начала')
    data_end = models.DateField(verbose_name='Дата окончания')
    #relations
    country = models.ForeignKey('country.Country', verbose_name='Страна', on_delete=models.PROTECT)
    city = models.ForeignKey('city.City', verbose_name='Город', on_delete=models.PROTECT)
    place = models.ForeignKey('place_exposition.PlaceExposition', verbose_name='Место проведения',
                              blank=True, null=True, on_delete=models.PROTECT, related_name='exposition_place')
    theme = models.ManyToManyField('theme.Theme', verbose_name='Тематики',
                              related_name='exposition_themes')
    tag = models.ManyToManyField('theme.Tag', verbose_name='Теги',
                              blank=True, null=True, related_name='exposition_tags')
    organiser = models.ManyToManyField('organiser.Organiser', verbose_name='Организатор',
                              blank=True, null=True, related_name='exposition_organisers')
    company = models.ManyToManyField('company.Company', verbose_name='Компании',
                              blank=True, null=True, related_name='exposition_compamies')
    users = models.ManyToManyField('accounts.User', verbose_name='Посетители выставки',
                              blank=True, null=True, related_name='exposition_users')
    #service = models.ManyToManyField('service.Service', verbose_name='Услуги',
    #  blank=True, null=True, related_name='exposition_services')
    periodic = models.FloatField(verbose_name='Переодичность', blank=True, null=True)
    audience = EnumField(values=AUDIENCE, blank=True)
    web_page = models.CharField(verbose_name='Вебсайт', max_length=255, blank=True)
    foundation_year = models.PositiveIntegerField(verbose_name='Год основания', blank=True, null=True)
    min_area = models.PositiveIntegerField(verbose_name='Минимальная площадь', blank=True, null=True)
    #
    currency = EnumField(values=CURRENCY, default='RUB')
    tax = models.BooleanField(verbose_name='Налог', default=1)
    min_closed_area = models.PositiveIntegerField(verbose_name='Минимальная цена закрытой НЕ оборудованной площади',
                                                  blank=True, null=True)
    max_closed_area = models.PositiveIntegerField(verbose_name='Максимальная цена закрытой НЕ оборудованной площади',
                                                  blank=True, null=True)
    min_closed_equipped_area = models.PositiveIntegerField(verbose_name='Минимальная цена закрытой оборудованной площади',
                                                  blank=True, null=True)
    max_closed_equipped_area = models.PositiveIntegerField(verbose_name='Максимальная цена закрытой оборудованной площади',
                                                  blank=True, null=True)
    min_open_area = models.PositiveIntegerField(verbose_name='Минимальная цена открытой площади',
                                                  blank=True, null=True)
    max_open_area = models.PositiveIntegerField(verbose_name='Максимальная цена открытой площади',
                                                  blank=True, null=True)
    registration_payment = models.PositiveIntegerField(verbose_name='Регистрационный взнос', blank=True, null=True)

    #administrator can cancel exposition
    canceled_by_administrator = models.BooleanField(default=0)
    #can publish not immediately
    is_published = models.BooleanField(default=0)

    translations = TranslatedFields(
        name = models.CharField(verbose_name='Название', max_length=255),
        main_title = models.TextField(verbose_name='Краткое описание', blank=True),
        description = models.TextField(verbose_name='Описание', blank=True),
        products = models.TextField(verbose_name='Экспонируемые продукты', blank=True),
        time = models.TextField(verbose_name='Время работы', blank=True),
        #-----meta data
        title = models.CharField(max_length=250),
        descriptions = models.CharField(max_length=250),
        keywords = models.CharField(max_length=250),
    )
    #field saves information about creating and changing model
    created = models.DateTimeField(auto_now_add=True)
    modified = models.DateTimeField(auto_now=True)

    #mark


    def __unicode__(self):
        return self.lazy_translation_getter('name', unicode(self.pk))

    def cancel(self):
        self.canceled_by_administrator = True

    def on(self):
        self.is_published = True
        self.canceled_by_administrator = False
        self.save()

    def off(self):
        self.is_published = False
        self.canceled_by_administrator = True
        self.save()


class TimeTable(TranslatableModel):
    """
    TimeTable for business program

    """
    exposition = models.ForeignKey(Exposition, related_name='business_program')
    begin = models.DateTimeField(verbose_name='Начало')
    end = models.DateTimeField(verbose_name='Конец')
    #translated fields
    translations = TranslatedFields(
        name = models.CharField(verbose_name='Название', max_length=255)
    )