48 lines
1.3 KiB
Python
48 lines
1.3 KiB
Python
from django.db import models
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from core.models import Category
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from core.utils import td_format
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from customers.models import Customer
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from .device import Device
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class WarrantyType(Category):
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description = models.TextField()
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class Meta:
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ordering = ["name"]
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verbose_name_plural = "Warranty Types"
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class Warranty(models.Model):
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customer = models.ForeignKey(Customer, on_delete=models.CASCADE, blank=True)
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device = models.ForeignKey(Device, on_delete=models.CASCADE)
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valid_from = models.DateField()
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valid_until = models.DateField()
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warranty_type = models.ForeignKey(
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WarrantyType, models.SET_NULL, blank=True, null=True
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)
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def save(self, *args, **kwargs):
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self.customer = self.device.customer
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super(Warranty, self).save(*args, **kwargs)
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def __str__(self):
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return str(self.device)
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class Meta:
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ordering = ["customer"]
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verbose_name_plural = "Warranties"
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constraints = [
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models.CheckConstraint(
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check=models.Q(valid_from__lte=models.F("valid_until")),
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name="valid_from_lt_valid_until",
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),
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]
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@property
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def duration_in_years(self):
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delta = self.valid_until - self.valid_from
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return td_format(delta)
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