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86 lines
3.4 KiB
Python
86 lines
3.4 KiB
Python
#
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# This file is part of pretix (Community Edition).
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#
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# Copyright (C) 2014-2020 Raphael Michel and contributors
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# Copyright (C) 2020-2021 rami.io GmbH and contributors
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#
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# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
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# Public License as published by the Free Software Foundation in version 3 of the License.
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#
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# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
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# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
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# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
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# this file, see <https://pretix.eu/about/en/license>.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along with this program. If not, see
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# <https://www.gnu.org/licenses/>.
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#
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from django.core.cache import cache
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from django_countries import Countries
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from django_countries.fields import CountryField
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from pretix.base.i18n import get_language_without_region
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class CachedCountries(Countries):
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_cached_lists = {}
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cache_subkey = None
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def __iter__(self):
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"""
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Iterate through countries, sorted by name, but cache the results based on the locale.
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django-countries performs a unicode-aware sorting based on pyuca which is incredibly
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slow.
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"""
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cache_key = "countries:all:{}".format(get_language_without_region())
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if self.cache_subkey:
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cache_key += ":" + self.cache_subkey
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if cache_key in self._cached_lists:
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yield from self._cached_lists[cache_key]
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return
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val = cache.get(cache_key)
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if val:
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self._cached_lists[cache_key] = val
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yield from val
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return
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val = list(super().__iter__())
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self._cached_lists[cache_key] = val
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cache.set(cache_key, val, 3600 * 24 * 30)
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yield from val
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class FastCountryField(CountryField):
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def __init__(self, *args, **kwargs):
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kwargs.setdefault("countries", CachedCountries)
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if "max_length" not in kwargs:
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# Override logic from CountryField to include 20% buffer. We don't want to migrate our database
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# every time a new country is added to the system!
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if kwargs.get("multiple", False):
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kwargs["max_length"] = int(len(kwargs['countries']()) * 3 * 1.2)
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else:
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kwargs["max_length"] = 2
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super().__init__(*args, **kwargs)
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def check(self, **kwargs):
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# Disable _check_choices since it would require sorting all country names at every import of this field,
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# which takes 1-2 seconds
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return [
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*self._check_field_name(),
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# *self._check_choices(),
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*self._check_db_index(),
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*self._check_null_allowed_for_primary_keys(),
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*self._check_backend_specific_checks(**kwargs),
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*self._check_validators(),
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*self._check_deprecation_details(),
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*self._check_multiple(),
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*self._check_max_length_attribute(**kwargs),
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]
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