85 lines
3.6 KiB
Python
85 lines
3.6 KiB
Python
from django.apps import AppConfig
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from django.core.signals import setting_changed
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from django.db import connections
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from django.db.backends.postgresql.psycopg_any import RANGE_TYPES
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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, OrderBy, TextField
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from django.db.models.functions import Collate
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from django.db.models.indexes import IndexExpression
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from django.utils.translation import gettext_lazy as _
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from .indexes import OpClass
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from .lookups import (
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SearchLookup,
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TrigramSimilar,
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TrigramStrictWordSimilar,
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TrigramWordSimilar,
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Unaccent,
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)
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from .serializers import RangeSerializer
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from .signals import register_type_handlers
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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 (
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not enter
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and setting == "INSTALLED_APPS"
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and "django.contrib.postgres" not in set(value)
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):
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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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CharField._unregister_lookup(TrigramWordSimilar)
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TextField._unregister_lookup(TrigramWordSimilar)
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CharField._unregister_lookup(TrigramStrictWordSimilar)
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TextField._unregister_lookup(TrigramStrictWordSimilar)
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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(initialized_only=True):
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if conn.vendor == "postgresql":
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conn.introspection.data_types_reverse.update(
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{
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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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)
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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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CharField.register_lookup(TrigramWordSimilar)
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TextField.register_lookup(TrigramWordSimilar)
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CharField.register_lookup(TrigramStrictWordSimilar)
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TextField.register_lookup(TrigramStrictWordSimilar)
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MigrationWriter.register_serializer(RANGE_TYPES, RangeSerializer)
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IndexExpression.register_wrappers(OrderBy, OpClass, Collate)
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