poulpe/equipment/models.py

from django.db import models
from django.core.exceptions import ValidationError
from django.utils.translation import ugettext_lazy as _
from event.models import Activity, EventSpecificMixin


class Equipment(EventSpecificMixin, models.Model):
    name = models.CharField(
                _("nom du matériel"),
                max_length=200,
            )
    stock = models.PositiveSmallIntegerField(_("quantité disponible"))
    description = models.TextField(_("description"))
    activities = models.ManyToManyField(
                Activity,
                related_name="equipment",
                through="EquipmentAttribution",
            )

    class Meta:
        verbose_name = _("matériel")
        verbose_name_plural = _("matériels")

    def __str__(self):
        return self.name


class EquipmentAttribution(models.Model):
    equipment = models.ForeignKey(Equipment)
    activity = models.ForeignKey(Activity)
    amount = models.PositiveSmallIntegerField(_("quantité attribuée"))
    remarks = models.TextField(_("remarques concernant l'attribution"))

    class Meta:
        verbose_name = _("attribution de matériel")
        verbose_name_plural = _("attributions de matériel")

    def __str__(self):
        return "%s (%d) -> %s" % (self.equipment.name,
                                  self.amout,
                                  self.activity.get_herited('title'))

    def save(self, *args, **kwargs):
        if self.equipment.event and self.equipment.event != self.activity.event:
            raise ValidationError

        super(EquipmentAttribution, self).save(*args, **kwargs)


class EquipmentRemark(models.Model):
    remark = models.TextField(_("remarque sur le matériel"))
    equipment = models.ForeignKey(
                Equipment,
                related_name="remarks",
                help_text=_("Matériel concerné par la remarque"),
            )
    amount = models.PositiveSmallIntegerField(_("quantité concernée"))
    is_broken = models.BooleanField()
    is_lost = models.BooleanField()

    class Meta:
        verbose_name = _("remarque sur matériel")
        verbose_name_plural = _("remarques sur le matériel")

    def __str__(self):
        return "%s : %s" % (self.equipment.name,
                            self.remark)