62 lines
1.9 KiB
Python
62 lines
1.9 KiB
Python
from django.db import models
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from django.core.exceptions import ValidationError
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from .companies import Customer
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from .computer import Computer
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from .user import User
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from .software import Software
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class License(models.Model):
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customer = models.ForeignKey(Customer, on_delete=models.CASCADE)
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key = models.CharField(max_length=50, null=True, blank=True)
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software = models.ForeignKey(Software,
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null=True,
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on_delete=models.CASCADE)
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def __str__(self):
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return str(self.customer) + ": " + str(self.software)
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class Meta:
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abstract = True
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class UserLicense(License):
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max_allowed_users = models.IntegerField(null=True, blank=True)
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user = models.ManyToManyField(User, through="LicenseWithUser")
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@property
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def used_licenses(self):
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return LicenseWithUser.objects.filter(pk=self.id).count()
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class ComputerLicense(License):
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max_allowed_computers = models.IntegerField(null=True, blank=True)
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computer = models.ManyToManyField(Computer, through="LicenseWithComputer")
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@property
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def used_licenses(self):
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return LicenseWithComputer.objects.filter(license=self).count()
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class LicenseWithUser(models.Model):
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user = models.ForeignKey(User, on_delete=models.CASCADE)
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license = models.ForeignKey(UserLicense, on_delete=models.CASCADE)
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class Meta:
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constraints = [
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models.UniqueConstraint(fields=['user', 'license'],
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name='user per license')
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]
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class LicenseWithComputer(models.Model):
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computer = models.ForeignKey(Computer, on_delete=models.CASCADE)
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license = models.ForeignKey(ComputerLicense, on_delete=models.CASCADE)
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class Meta:
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constraints = [
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models.UniqueConstraint(fields=['computer', 'license'],
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name='computer per license')
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]
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