1 files changed, 84 insertions, 0 deletions
diff --git a/lib/sqlalchemy/dialects/mysql/json.py b/lib/sqlalchemy/dialects/mysql/json.py
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+++ b/lib/sqlalchemy/dialects/mysql/json.py
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+# 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
+                ]
+            )
+        )