forked from CGM_Public/pretix_original
52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
from django.core.cache import cache
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from django.utils.translation import get_language
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from django_countries import Countries
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from django_countries.fields import CountryField
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class CachedCountries(Countries):
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_cached_lists = {}
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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())
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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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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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