# Copyright (c) 2020, 2022, Oracle and/or its affiliates.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License, version 2.0, as
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# published by the Free Software Foundation.
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#
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# This program is also distributed with certain software (including
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# but not limited to OpenSSL) that is licensed under separate terms,
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# as designated in a particular file or component or in included license
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# documentation. The authors of MySQL hereby grant you an
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# additional permission to link the program and your derivative works
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# with the separately licensed software that they have included with
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# MySQL.
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#
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# Without limiting anything contained in the foregoing, this file,
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# which is part of MySQL Connector/Python, is also subject to the
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# Universal FOSS Exception, version 1.0, a copy of which can be found at
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# http://oss.oracle.com/licenses/universal-foss-exception.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the GNU General Public License, version 2.0, for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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# mypy: disable-error-code="override"
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"""Database schema editor."""
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from typing import Any
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from django.db.backends.mysql.schema import (
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DatabaseSchemaEditor as MySQLDatabaseSchemaEditor,
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)
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class DatabaseSchemaEditor(MySQLDatabaseSchemaEditor):
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"""This class is responsible for emitting schema-changing statements to the
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databases.
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"""
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def quote_value(self, value: Any) -> Any:
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"""Quote value."""
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self.connection.ensure_connection()
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if isinstance(value, str):
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value = value.replace("%", "%%")
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quoted = self.connection.connection.converter.escape(value)
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if isinstance(value, str) and isinstance(quoted, bytes):
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quoted = quoted.decode()
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return quoted
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def prepare_default(self, value: Any) -> Any:
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"""Implement the required abstract method.
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MySQL has requires_literal_defaults=False, therefore return the value.
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"""
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return value
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