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100 lines
3.7 KiB
100 lines
3.7 KiB
# -*- coding: utf-8 -*-
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from django.db import models
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from hvad.models import TranslatableModel, TranslatedFields, TranslationManager
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from django.contrib.contenttypes.models import ContentType
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from django.contrib.contenttypes import generic
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import copy
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from django.utils.translation import ugettext as _
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#functions
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from functions.custom_fields import EnumField
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class NewsManager(TranslationManager):
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def safe_get(self, **kwargs):
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model = self.model
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try:
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return model.objects.get(**kwargs)
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except:
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return None
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TYPES = ('announcement', 'news', 'overview')
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class News(TranslatableModel):
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MAX_ON_MAIN_PAGE = 3
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#set manager of this model
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objects = NewsManager()
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content_type = models.ForeignKey(ContentType, null=True)
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object_id = models.PositiveIntegerField(blank=True, null=True)
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object = generic.GenericForeignKey(content_type, object_id)
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url = models.SlugField(unique=True)
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date = models.DateField(verbose_name=_(u'Дата'))
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type = EnumField(values=TYPES)
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theme = models.ManyToManyField('theme.Theme', verbose_name=_(u'Тема'))
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tag = models.ManyToManyField('theme.Tag', verbose_name=_(u'Теги'), blank=True, null=True)
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user = models.ForeignKey('accounts.User', verbose_name=_(u'Организатор'), blank=True, null=True,
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on_delete=models.PROTECT)
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paid = models.BooleanField(default=0)
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translations = TranslatedFields(
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main_title = models.CharField(verbose_name=_(u'Заголовок'), max_length=255),
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preview = models.TextField(verbose_name=_(u'Превью')),
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description = models.TextField(verbose_name=_(u'Описание')),
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#---meta data
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title = models.CharField(max_length=250, blank=True),
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descriptions = models.CharField(max_length=250, blank=True),
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keywords = models.CharField(max_length=250, blank=True),
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)
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#fields saves information about creating and changing model
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created = models.DateTimeField(auto_now_add=True)
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modified = models.DateTimeField(auto_now=True)
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main_page = models.PositiveIntegerField(default=0, db_index=True)
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views = models.PositiveIntegerField(default=0)
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def __unicode__(self):
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return self.lazy_translation_getter('main_title', self.pk)
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def clone(self):
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"""
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Return an identical copy of the instance with a new ID.
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"""
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if not self.pk:
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raise ValueError('Instance must be saved before it can be cloned.')
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duplicate = copy.copy(self)
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# Setting pk to None. Django thinking this is a new object.
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duplicate.pk = None
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# url must be unique
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duplicate.url += '_copy'
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if News.objects.safe_get(url=duplicate.url):
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#already has copy this instance
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return
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ignore_fields = ['id', 'master', 'language_code']
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duplicate.translate('ru')
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tr = self._meta.translations_model.objects.get(language_code = 'ru',master__id=self.pk)
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for field in duplicate._translated_field_names:
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if field in ignore_fields:
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continue
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setattr(duplicate, field, getattr(tr, field))
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duplicate.save()
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# but lost all ManyToMany relations and Translations.
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# copy relations
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for field in self._meta.many_to_many:
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source = getattr(self, field.attname)
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destination = getattr(duplicate, field.attname)
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for item in source.all():
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destination.add(item)
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return duplicate
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from django.db.models.signals import post_save
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from functions.signal_handlers import post_save_handler
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post_save.connect(post_save_handler, sender=News)
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