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65 lines
2.0 KiB
Python
65 lines
2.0 KiB
Python
from uuid import uuid4
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from django.db import models
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# from django.core.files.storage import FileSystemStorage
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# from django.dispatch import receiver
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from dcc.utils import get_image_preview
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from metadata.models import Manufacturer, Decoder, Company, Tag
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# class OverwriteMixin(FileSystemStorage):
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# def get_available_name(self, name, max_length):
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# self.delete(name)
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# return name
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class RollingStock(models.Model):
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uuid = models.UUIDField(
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primary_key=True, default=uuid4,
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editable=False)
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identifier = models.CharField(max_length=128, unique=False)
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tags = models.ManyToManyField(
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Tag,
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related_name='rolling_stock',
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blank=True)
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address = models.SmallIntegerField(default=3, null=True, blank=True)
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manufacturer = models.ForeignKey(
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Manufacturer, on_delete=models.CASCADE,
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null=True, blank=True)
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decoder = models.ForeignKey(
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Decoder, on_delete=models.CASCADE,
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null=True, blank=True)
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company = models.ForeignKey(
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Company, on_delete=models.CASCADE,
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null=True, blank=True)
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epoch = models.CharField(max_length=32, blank=True)
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production_year = models.SmallIntegerField(null=True, blank=True)
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purchase_date = models.DateField(null=True, blank=True)
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image = models.ImageField(
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upload_to='images/',
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null=True,
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blank=True)
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notes = models.TextField(blank=True)
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creation_time = models.DateTimeField(auto_now_add=True)
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updated_time = models.DateTimeField(auto_now=True)
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class Meta:
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ordering = ['address', 'identifier']
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verbose_name_plural = "Rolling stock"
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def __str__(self):
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return "{0} {1}".format(self.manufacturer, self.identifier)
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def image_thumbnail(self):
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return get_image_preview(self.image.url)
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image_thumbnail.short_description = "Preview"
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# @receiver(models.signals.post_delete, sender=Cab)
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# def post_save_image(sender, instance, *args, **kwargs):
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# try:
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# instance.image.delete(save=False)
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# except Exception:
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# pass
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