models.py
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"""
Copyright 2016, 2017 UFPE - Universidade Federal de Pernambuco
Este arquivo é parte do programa Amadeus Sistema de Gestão de Aprendizagem, ou simplesmente Amadeus LMS
O Amadeus LMS é um software livre; você pode redistribui-lo e/ou modifica-lo dentro dos termos da Licença Pública Geral GNU como publicada pela Fundação do Software Livre (FSF); na versão 2 da Licença.
Este programa é distribuído na esperança que possa ser útil, mas SEM NENHUMA GARANTIA; sem uma garantia implícita de ADEQUAÇÃO a qualquer MERCADO ou APLICAÇÃO EM PARTICULAR. Veja a Licença Pública Geral GNU para maiores detalhes.
Você deve ter recebido uma cópia da Licença Pública Geral GNU, sob o título "LICENSE", junto com este programa, se não, escreva para a Fundação do Software Livre (FSF) Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
"""
from django.db import models
from autoslug.fields import AutoSlugField
from django.utils.translation import ugettext_lazy as _
from subjects.models import Subject, Tag
from students_group.models import StudentsGroup
from users.models import User
from .decorators import always_as_child
class Topic(models.Model):
name = models.CharField(_('Name'), max_length = 200)
slug = AutoSlugField(_("Slug"), populate_from = 'name', unique = True)
description = models.TextField(_('Description'), blank = True)
repository = models.BooleanField(_('Repository'), default = False)
visible = models.BooleanField(_('Visible'), default = True)
subject = models.ForeignKey(Subject, verbose_name = _('Subject'), related_name = 'topic_subject', null = True)
order = models.PositiveSmallIntegerField(_('Order'), null = True)
create_date = models.DateTimeField(_('Create Date'), auto_now_add = True)
last_update = models.DateTimeField(_('Last Update'), auto_now = True)
class Meta:
verbose_name = _('Topic')
verbose_name_plural = _('Topics')
ordering = ['order']
def __str__(self):
return self.name
"""
Abstract model to make easier to know which kind of Resource we are dealing with
"""
class KnowsChild(models.Model):
# Make a place to store the class name of the child
_my_subclass = models.CharField(max_length=200)
class Meta:
abstract = True
def as_child(self):
return getattr(self, self._my_subclass)
def save(self, *args, **kwargs):
# save what kind we are.
if not self._my_subclass:
self._my_subclass = self.__class__.__name__.lower()
super(KnowsChild, self).save(*args, **kwargs)
class Resource(KnowsChild):
name = models.CharField(_('Name'), max_length = 200)
slug = AutoSlugField(_("Slug"), populate_from = 'name', unique = True)
brief_description = models.TextField(_('Brief Description'), blank = True)
show_window = models.BooleanField(_('Show in new window'), default = False)
all_students = models.BooleanField(_('All Students'), default = False)
visible = models.BooleanField(_('Visible'), default = True)
order = models.PositiveSmallIntegerField(_('Order'), null = True)
topic = models.ForeignKey(Topic, verbose_name = _('Topic'), related_name = "resource_topic", null = True)
students = models.ManyToManyField(User, verbose_name = _('Students'), related_name = 'resource_students', blank = True)
groups = models.ManyToManyField(StudentsGroup, verbose_name = _('Groups'), related_name = 'resource_groups', blank = True)
tags = models.ManyToManyField(Tag, verbose_name = _('Markers'), related_name = 'resource_tags', blank = True)
create_date = models.DateTimeField(_('Create Date'), auto_now_add = True)
last_update = models.DateTimeField(_('Last Update'), auto_now = True)
class Meta:
verbose_name = _('Resource')
verbose_name_plural = _('Resources')
ordering = ['order']
def __str__(self):
return self.name
"""
Method to get the appropriated view link
Must override in the child models
"""
@always_as_child
def access_link(self):
pass
"""
Method to get the appropriated update link
Must override in the child models
"""
@always_as_child
def update_link(self):
pass
"""
Method to get the appropriated delete link
Must override in the child models
"""
@always_as_child
def delete_link(self):
pass
@always_as_child
def delete_message(self):
pass