100 lines
3.1 KiB
Python
100 lines
3.1 KiB
Python
from __future__ import unicode_literals
|
|
from django.core.exceptions import ValidationError
|
|
from django.utils.translation import ugettext as _
|
|
from django.db import models
|
|
from django.contrib.auth.models import User
|
|
|
|
from supplier.models import Customer
|
|
from part.models import Part, PartRevision
|
|
|
|
|
|
class UniquePartManager(models.Manager):
|
|
""" Ensures UniqueParts are correctly handled
|
|
"""
|
|
|
|
def create(self, *args, **kwargs):
|
|
|
|
part_id = kwargs['part']
|
|
sn = kwargs.get('serial', None)
|
|
|
|
if not sn:
|
|
raise ValidationError(_("Serial number must be supplied"))
|
|
|
|
if not isinstance(sn, int):
|
|
raise ValidationError(_("Serial number must be integer"))
|
|
|
|
# Does a part already exists with this serial number?
|
|
parts = self.filter(part=part_id, serial=sn)
|
|
if len(parts) > 0:
|
|
raise ValidationError(_("Matching part and serial number found!"))
|
|
|
|
return super(UniquePartManager, self).create(*args, **kwargs)
|
|
|
|
|
|
class UniquePart(models.Model):
|
|
""" A unique instance of a Part object.
|
|
Used for tracking parts based on serial numbers,
|
|
and tracking all events in the life of a part
|
|
"""
|
|
|
|
objects = UniquePartManager()
|
|
|
|
part = models.ForeignKey(Part, on_delete=models.CASCADE)
|
|
|
|
revision = models.ForeignKey(PartRevision,
|
|
on_delete=models.CASCADE,
|
|
blank=True,
|
|
null=True)
|
|
|
|
creation_date = models.DateField(auto_now_add=True,
|
|
editable=False)
|
|
serial = models.IntegerField()
|
|
|
|
createdBy = models.ForeignKey(User)
|
|
|
|
customer = models.ForeignKey(Customer, blank=True, null=True)
|
|
|
|
# Part status types
|
|
PART_IN_PROGRESS = 0
|
|
PART_IN_STOCK = 10
|
|
PART_SHIPPED = 20
|
|
PART_RETURNED = 30
|
|
PART_DAMAGED = 40
|
|
PART_DESTROYED = 50
|
|
|
|
PART_STATUS_CODES = {
|
|
PART_IN_PROGRESS: _("In progress"),
|
|
PART_IN_STOCK: _("In stock"),
|
|
PART_SHIPPED: _("Shipped"),
|
|
PART_RETURNED: _("Returned"),
|
|
PART_DAMAGED: _("Damaged"),
|
|
PART_DESTROYED: _("Destroyed")
|
|
}
|
|
|
|
status = models.IntegerField(default=PART_IN_PROGRESS, choices=PART_STATUS_CODES.items())
|
|
|
|
def __str__(self):
|
|
return self.part.name
|
|
|
|
def save(self, *args, **kwargs):
|
|
|
|
# Disallow saving a serial number that already exists
|
|
matches = UniquePart.objects.filter(serial=self.serial, part=self.part)
|
|
matches = matches.filter(~models.Q(id=self.id))
|
|
|
|
if len(matches) > 0:
|
|
raise ValidationError(_("Matching serial number already exists"))
|
|
|
|
super(UniquePart, self).save(*args, **kwargs)
|
|
|
|
|
|
class PartTrackingInfo(models.Model):
|
|
""" Single data-point in the life of a UniquePart
|
|
Each time something happens to the UniquePart,
|
|
a new PartTrackingInfo object should be created.
|
|
"""
|
|
|
|
part = models.ForeignKey(UniquePart, on_delete=models.CASCADE, related_name='tracking_info')
|
|
date = models.DateField(auto_now_add=True, editable=False)
|
|
notes = models.CharField(max_length=500)
|