82 lines
3.1 KiB
Python
82 lines
3.1 KiB
Python
# -*- coding: utf-8 -*-
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# Generated by Django 1.11.18 on 2020-09-17 15:38
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from __future__ import unicode_literals
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from django.db import migrations, transaction
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from django.db.migrations.operations.base import Operation
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from django.db.utils import InternalError, OperationalError, ProgrammingError
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class SafeExtensionOperation(Operation):
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reversible = True
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def state_forwards(self, app_label, state):
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pass
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def database_forwards(self, app_label, schema_editor, from_state, to_state):
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if schema_editor.connection.vendor != 'postgresql':
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return
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try:
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with transaction.atomic():
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try:
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schema_editor.execute('CREATE EXTENSION IF NOT EXISTS %s SCHEMA public' % self.name)
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except (OperationalError, ProgrammingError):
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# OperationalError if the extension is not available
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# ProgrammingError in case of denied permission
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RunSQLIfExtension.extensions_installed = False
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except InternalError:
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# InternalError (current transaction is aborted, commands ignored
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# until end of transaction block) would be raised when django-
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# tenant-schemas set search_path.
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RunSQLIfExtension.extensions_installed = False
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def database_backwards(self, app_label, schema_editor, from_state, to_state):
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try:
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with transaction.atomic():
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schema_editor.execute('DROP EXTENSION IF EXISTS %s' % self.name)
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except InternalError:
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# Raised when other objects depend on the extension. This happens in a multitenant
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# context, where extension in installed in schema "public" but referenced in others (via
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# public.gist_trgm_ops). In this case, do nothing, as the query should be successful
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# when last tenant is processed.
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pass
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class RunSQLIfExtension(migrations.RunSQL):
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extensions_installed = True
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def __getattribute__(self, name):
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if name == 'sql' and not self.extensions_installed:
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return migrations.RunSQL.noop
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return object.__getattribute__(self, name)
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class UnaccentExtension(SafeExtensionOperation):
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name = 'unaccent'
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class TrigramExtension(SafeExtensionOperation):
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name = 'pg_trgm'
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class Migration(migrations.Migration):
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dependencies = [
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('authentic2', '0027_remove_deleteduser'),
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]
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operations = [
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TrigramExtension(),
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UnaccentExtension(),
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RunSQLIfExtension(
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sql=["CREATE OR REPLACE FUNCTION public.immutable_unaccent(text) RETURNS varchar AS $$ "
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"SELECT public.unaccent('public.unaccent',$1::text); $$ LANGUAGE 'sql' IMMUTABLE"],
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reverse_sql=['DROP FUNCTION IF EXISTS public.immutable_unaccent(text)']
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),
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RunSQLIfExtension(
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sql=["CREATE INDEX custom_user_name_gist_idx ON custom_user_user USING gist "
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"(LOWER(public.immutable_unaccent(first_name || ' ' || last_name)) public.gist_trgm_ops)"],
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reverse_sql=['DROP INDEX IF EXISTS custom_user_name_gist_idx'],
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),
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]
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