78 lines
2.2 KiB
Python
78 lines
2.2 KiB
Python
from __future__ import unicode_literals
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from rest_framework.exceptions import ValidationError
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from django.utils.translation import ugettext as _
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from django.db import models
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# from django.contrib.auth.models import User
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from supplier.models import Customer
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from part.models import Part
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class UniquePartManager(models.Manager):
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def create(self, *args, **kwargs):
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part = kwargs.get('part', None)
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if not part.trackable:
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raise ValidationError("Unique part cannot be created for a non-trackable part")
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return super(UniquePartManager, self).create(*args, **kwargs)
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class UniquePart(models.Model):
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""" A unique instance of a Part object.
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Used for tracking parts based on serial numbers,
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and tracking all events in the life of a part
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"""
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objects = UniquePartManager()
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class Meta:
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# Cannot have multiple parts with same serial number
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unique_together = ('part', 'serial')
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part = models.ForeignKey(Part, on_delete=models.CASCADE, related_name='serials')
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creation_date = models.DateField(auto_now_add=True,
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editable=False)
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serial = models.PositiveIntegerField()
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# createdBy = models.ForeignKey(User)
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customer = models.ForeignKey(Customer, blank=True, null=True)
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# Part status types
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PART_IN_PROGRESS = 0
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PART_IN_STOCK = 10
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PART_SHIPPED = 20
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PART_RETURNED = 30
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PART_DAMAGED = 40
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PART_DESTROYED = 50
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PART_STATUS_CODES = {
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PART_IN_PROGRESS: _("In progress"),
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PART_IN_STOCK: _("In stock"),
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PART_SHIPPED: _("Shipped"),
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PART_RETURNED: _("Returned"),
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PART_DAMAGED: _("Damaged"),
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PART_DESTROYED: _("Destroyed")
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}
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status = models.IntegerField(default=PART_IN_PROGRESS, choices=PART_STATUS_CODES.items())
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def __str__(self):
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return self.part.name
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class PartTrackingInfo(models.Model):
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""" Single data-point in the life of a UniquePart
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Each time something happens to the UniquePart,
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a new PartTrackingInfo object should be created.
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"""
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part = models.ForeignKey(UniquePart, on_delete=models.CASCADE, related_name='tracking_info')
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date = models.DateField(auto_now_add=True, editable=False)
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notes = models.CharField(max_length=500)
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