55 lines
1.7 KiB
Python
55 lines
1.7 KiB
Python
from django.core.exceptions import ValidationError
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from django.db import models
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from django.db.models import Q
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from geopy.geocoders import Nominatim
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class GeoFencing(models.Model):
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latitude = models.FloatField()
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longitude = models.FloatField()
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radius_in_meters = models.IntegerField()
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company_id = models.OneToOneField(
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"base.Company",
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related_name="geo_fencing",
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on_delete=models.CASCADE,
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blank=True,
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null=True,
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)
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start = models.BooleanField(default=False)
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def clean(self):
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if self.company_id is None:
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qs = GeoFencing.objects.filter(company_id__isnull=True)
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if self.pk:
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qs = qs.exclude(pk=self.pk)
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if qs.exists():
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raise ValidationError("Only one GeoFencing can have a null company_id.")
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geolocator = Nominatim(
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user_agent="geo_checker_unique"
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) # Unique user-agent is important
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if self.start:
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try:
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location = geolocator.reverse(
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(self.latitude, self.longitude), exactly_one=True
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)
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if not location:
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raise ValidationError("Invalid location coordinates.")
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except Exception as e:
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raise ValidationError(f"Geolocation error: {e}")
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return super().clean()
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def save(self, *args, **kwargs):
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self.full_clean() # Run clean before save
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super().save(*args, **kwargs)
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class Meta:
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constraints = [
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models.UniqueConstraint(
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fields=["company_id"],
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name="unique_company_id_when_not_null_geofencing",
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condition=~Q(company_id=None),
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)
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]
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