You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
2.3 KiB
85 lines
2.3 KiB
# mysql/json.py
|
|
# Copyright (C) 2005-2022 the SQLAlchemy authors and contributors
|
|
# <see AUTHORS file>
|
|
#
|
|
# This module is part of SQLAlchemy and is released under
|
|
# the MIT License: https://www.opensource.org/licenses/mit-license.php
|
|
|
|
from __future__ import absolute_import
|
|
|
|
from ... import types as sqltypes
|
|
|
|
|
|
class JSON(sqltypes.JSON):
|
|
"""MySQL JSON type.
|
|
|
|
MySQL supports JSON as of version 5.7.
|
|
MariaDB supports JSON (as an alias for LONGTEXT) as of version 10.2.
|
|
|
|
:class:`_mysql.JSON` is used automatically whenever the base
|
|
:class:`_types.JSON` datatype is used against a MySQL or MariaDB backend.
|
|
|
|
.. seealso::
|
|
|
|
:class:`_types.JSON` - main documentation for the generic
|
|
cross-platform JSON datatype.
|
|
|
|
The :class:`.mysql.JSON` type supports persistence of JSON values
|
|
as well as the core index operations provided by :class:`_types.JSON`
|
|
datatype, by adapting the operations to render the ``JSON_EXTRACT``
|
|
function at the database level.
|
|
|
|
.. versionadded:: 1.1
|
|
|
|
"""
|
|
|
|
pass
|
|
|
|
|
|
class _FormatTypeMixin(object):
|
|
def _format_value(self, value):
|
|
raise NotImplementedError()
|
|
|
|
def bind_processor(self, dialect):
|
|
super_proc = self.string_bind_processor(dialect)
|
|
|
|
def process(value):
|
|
value = self._format_value(value)
|
|
if super_proc:
|
|
value = super_proc(value)
|
|
return value
|
|
|
|
return process
|
|
|
|
def literal_processor(self, dialect):
|
|
super_proc = self.string_literal_processor(dialect)
|
|
|
|
def process(value):
|
|
value = self._format_value(value)
|
|
if super_proc:
|
|
value = super_proc(value)
|
|
return value
|
|
|
|
return process
|
|
|
|
|
|
class JSONIndexType(_FormatTypeMixin, sqltypes.JSON.JSONIndexType):
|
|
def _format_value(self, value):
|
|
if isinstance(value, int):
|
|
value = "$[%s]" % value
|
|
else:
|
|
value = '$."%s"' % value
|
|
return value
|
|
|
|
|
|
class JSONPathType(_FormatTypeMixin, sqltypes.JSON.JSONPathType):
|
|
def _format_value(self, value):
|
|
return "$%s" % (
|
|
"".join(
|
|
[
|
|
"[%s]" % elem if isinstance(elem, int) else '."%s"' % elem
|
|
for elem in value
|
|
]
|
|
)
|
|
)
|