gistfile1.py

class Item(models.Model):
    item_number = models.CharField(u"항목번호", max_length=3)
    category = models.ForeignKey(Category, verbose_name=u"범주")
    title = models.CharField(max_length=50, verbose_name=u"항목명")
    slug = models.SlugField(blank=True)
    description = models.TextField(blank=True, verbose_name=u'메모')
 
    class Meta:
        ordering = ["item_number"]
        verbose_name = u'항목'
        verbose_name_plural = u'항목'
 
    def save(self, *args, **kwargs):
        if not self.slug:
            self.slug = slugify(self.title)
        super(Item, self).save(*args, **kwargs)        
 
    def __unicode__(self):
        return "%s - %s" % (self.category.title, self.title)
 
    def sum_income(self):
        item_list = Budget.objects.filter(item__item_number__startswith="00").values_list("money",flat=True)
        return sum(item_list)
    def sum_management(self):
        item_list = Budget.objects.filter(item__item_number__startswith="11").values_list("money",flat=True)
        return sum(item_list)
    def sum_education(self):
        item_list = Budget.objects.filter(item__item_number__startswith="12").values_list("money",flat=True)
        return sum(item_list)
    def sum_feed(self):
        item_list = Budget.objects.filter(item__item_number__startswith="13").values_list("money",flat=True)
        return sum(item_list)
    def sum_reward(self):
        item_list = Budget.objects.filter(item__item_number__startswith="14").values_list("money",flat=True)
        return sum(item_list)
    def sum_mission(self):
        item_list = Budget.objects.filter(item__item_number__startswith="15").values_list("money",flat=True)
        return sum(item_list)
    def sum_operation(self):
        item_list = Budget.objects.filter(item__item_number__startswith="16").values_list("money",flat=True)
        return sum(item_list)
    def sum_etc(self):
        item_list = Budget.objects.filter(item__item_number__startswith="19").values_list("money",flat=True)
        return sum(item_list)