c3lf-system-3/core/inventory/models.py

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from django.core.files.base import ContentFile
from django.db import models, IntegrityError
from django_softdelete.models import SoftDeleteModel
class ItemManager(models.Manager):
def create(self, **kwargs):
if 'uid' in kwargs:
raise ValueError('uid must not be set manually')
uid = Item.objects.filter(event=kwargs['event']).count() + 1
kwargs['uid'] = uid
return super().create(**kwargs)
class Item(models.Model):
iid = models.AutoField(primary_key=True)
uid = models.IntegerField()
description = models.TextField()
event = models.ForeignKey('Event', models.CASCADE, db_column='eid')
container = models.ForeignKey('Container', models.CASCADE, db_column='cid')
returned_at = models.DateTimeField(blank=True, null=True)
created_at = models.DateTimeField(blank=True, null=True)
updated_at = models.DateTimeField(blank=True, null=True)
objects = ItemManager()
class Meta:
unique_together = (('uid', 'event'),)
class Container(models.Model):
cid = models.AutoField(primary_key=True)
name = models.CharField(max_length=255)
created_at = models.DateTimeField(blank=True, null=True)
updated_at = models.DateTimeField(blank=True, null=True)
class Event(models.Model):
eid = models.AutoField(primary_key=True)
name = models.CharField(max_length=255)
slug = models.CharField(max_length=255, unique=True)
start = models.DateTimeField(blank=True, null=True)
end = models.DateTimeField(blank=True, null=True)
pre_start = models.DateTimeField(blank=True, null=True)
post_end = models.DateTimeField(blank=True, null=True)
created_at = models.DateTimeField(blank=True, null=True)
updated_at = models.DateTimeField(blank=True, null=True)