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67 lines
2.9 KiB
Python
67 lines
2.9 KiB
Python
5 years ago
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from psycopg2.extras import (
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DateRange, DateTimeRange, DateTimeTZRange, NumericRange,
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)
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from django.apps import AppConfig
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from django.db import connections
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from django.db.backends.signals import connection_created
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from django.db.migrations.writer import MigrationWriter
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from django.db.models import CharField, TextField
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from django.test.signals import setting_changed
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from django.utils.translation import gettext_lazy as _
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from .lookups import SearchLookup, TrigramSimilar, Unaccent
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from .serializers import RangeSerializer
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from .signals import register_type_handlers
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RANGE_TYPES = (DateRange, DateTimeRange, DateTimeTZRange, NumericRange)
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def uninstall_if_needed(setting, value, enter, **kwargs):
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"""
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Undo the effects of PostgresConfig.ready() when django.contrib.postgres
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is "uninstalled" by override_settings().
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"""
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if not enter and setting == 'INSTALLED_APPS' and 'django.contrib.postgres' not in set(value):
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connection_created.disconnect(register_type_handlers)
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CharField._unregister_lookup(Unaccent)
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TextField._unregister_lookup(Unaccent)
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CharField._unregister_lookup(SearchLookup)
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TextField._unregister_lookup(SearchLookup)
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CharField._unregister_lookup(TrigramSimilar)
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TextField._unregister_lookup(TrigramSimilar)
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# Disconnect this receiver until the next time this app is installed
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# and ready() connects it again to prevent unnecessary processing on
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# each setting change.
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setting_changed.disconnect(uninstall_if_needed)
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MigrationWriter.unregister_serializer(RANGE_TYPES)
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class PostgresConfig(AppConfig):
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name = 'django.contrib.postgres'
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verbose_name = _('PostgreSQL extensions')
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def ready(self):
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setting_changed.connect(uninstall_if_needed)
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# Connections may already exist before we are called.
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for conn in connections.all():
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if conn.vendor == 'postgresql':
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conn.introspection.data_types_reverse.update({
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3802: 'django.contrib.postgres.fields.JSONField',
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3904: 'django.contrib.postgres.fields.IntegerRangeField',
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3906: 'django.contrib.postgres.fields.DecimalRangeField',
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3910: 'django.contrib.postgres.fields.DateTimeRangeField',
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3912: 'django.contrib.postgres.fields.DateRangeField',
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3926: 'django.contrib.postgres.fields.BigIntegerRangeField',
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})
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if conn.connection is not None:
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register_type_handlers(conn)
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connection_created.connect(register_type_handlers)
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CharField.register_lookup(Unaccent)
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TextField.register_lookup(Unaccent)
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CharField.register_lookup(SearchLookup)
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TextField.register_lookup(SearchLookup)
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CharField.register_lookup(TrigramSimilar)
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TextField.register_lookup(TrigramSimilar)
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MigrationWriter.register_serializer(RANGE_TYPES, RangeSerializer)
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