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from django.conf import settings from django.core import checks from django.db import models from django.utils.encoding import force_text from django.utils.translation import gettext_lazy as _ from phonenumber_field import formfields from phonenumber_field.phonenumber import PhoneNumber, to_python, validate_region from phonenumber_field.validators import validate_international_phonenumber class PhoneNumberDescriptor: """ The descriptor for the phone number attribute on the model instance. Returns a PhoneNumber when accessed so you can do stuff like:: >>> instance.phone_number.as_international Assigns a phone number object on assignment so you can do:: >>> instance.phone_number = PhoneNumber(...) or, >>> instance.phone_number = '+414204242' """ def __init__(self, field): self.field = field def __get__(self, instance, owner): if instance is None: return self # The instance dict contains whatever was originally assigned in # __set__. if self.field.name in instance.__dict__: value = instance.__dict__[self.field.name] else: instance.refresh_from_db(fields=[self.field.name]) value = getattr(instance, self.field.name) return value def __set__(self, instance, value): instance.__dict__[self.field.name] = to_python(value, region=self.field.region) class PhoneNumberField(models.CharField): attr_class = PhoneNumber descriptor_class = PhoneNumberDescriptor default_validators = [validate_international_phonenumber] description = _("Phone number") def __init__(self, *args, region=None, **kwargs): kwargs.setdefault("max_length", 128) super().__init__(*args, **kwargs) self._region = region @property def region(self): return self._region or getattr(settings, "PHONENUMBER_DEFAULT_REGION", None) def check(self, **kwargs): errors = super().check(**kwargs) errors.extend(self._check_region()) return errors def _check_region(self): try: validate_region(self.region) except ValueError as e: return [checks.Error(force_text(e), obj=self)] return [] def get_prep_value(self, value): """ Perform preliminary non-db specific value checks and conversions. """ if not value: return super().get_prep_value(value) if isinstance(value, PhoneNumber): parsed_value = value else: # Convert the string to a PhoneNumber object. parsed_value = to_python(value) if parsed_value.is_valid(): # A valid phone number. Normalize it for storage. format_string = getattr(settings, "PHONENUMBER_DB_FORMAT", "E164") fmt = PhoneNumber.format_map[format_string] value = parsed_value.format_as(fmt) else: # Not a valid phone number. Store the raw string. value = parsed_value.raw_input return super().get_prep_value(value) def contribute_to_class(self, cls, name, *args, **kwargs): super().contribute_to_class(cls, name, *args, **kwargs) setattr(cls, self.name, self.descriptor_class(self)) def deconstruct(self): name, path, args, kwargs = super().deconstruct() kwargs["region"] = self._region return name, path, args, kwargs def formfield(self, **kwargs): defaults = { "form_class": formfields.PhoneNumberField, "region": self.region, "error_messages": self.error_messages, } defaults.update(kwargs) return super().formfield(**defaults)