OneBot v11 Bot发送的合并转发消息无法序列化

[njdldkl666699]

如下代码，在v0.7.0版本中发送消息后报错。

bot_id, bot_nickname = await get_onebot_info(bot)
node_custom_message = OneBotMessage()
for segment in segments:
    node_custom_message += MessageSegment.node_custom(
        bot_id, bot_nickname, OneBotMessage(segment)
    )
await matcher.finish(node_custom_message)

这段代码让Bot回复一个合并转发消息，包含若干条文本消息。代码本身逻辑没有问题，可以正常发送。但在nonebot_plugin_chatrecorder的 CalledAPI hook中报错如下：

07-26 16:27:36 [ERROR] nonebot | Error when running CalledAPI hook. Running cancelled!
Traceback (most recent call last):
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/engine/base.py", line 1817, in _execute_context
    context = constructor(
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/engine/default.py", line 1496, in _init_compiled
    flattened_processors[key](compiled_params[key])
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/sql/sqltypes.py", line 2802, in process
    return json_serializer(value)
  File "/home/cola/.local/share/uv/python/cpython-3.13.12-linux-x86_64-gnu/lib/python3.13/json/__init__.py", line 235, in dumps
    return _default_encoder.encode(obj)
  File "/home/cola/.local/share/uv/python/cpython-3.13.12-linux-x86_64-gnu/lib/python3.13/json/encoder.py", line 202, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/home/cola/.local/share/uv/python/cpython-3.13.12-linux-x86_64-gnu/lib/python3.13/json/encoder.py", line 263, in iterencode
    return _iterencode(o, 0)
  File "/home/cola/.local/share/uv/python/cpython-3.13.12-linux-x86_64-gnu/lib/python3.13/json/encoder.py", line 182, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type MessageSegment is not JSON serializable

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
> File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/anyio/_core/_tasks.py", line 275, in _run_coro
    retval = await self._coro
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/nonebot_plugin_chatrecorder/adapters/onebot_v11.py", line 106, in record_send_msg
    await db_session.commit()
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/ext/asyncio/session.py", line 999, in commit
    await greenlet_spawn(self.sync_session.commit)
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/util/_concurrency_py3k.py", line 203, in greenlet_spawn
    result = context.switch(value)
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/session.py", line 2035, in commit
    trans.commit(_to_root=True)
  File "<string>", line 2, in commit
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/state_changes.py", line 137, in _go
    ret_value = fn(self, *arg, **kw)
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/session.py", line 1316, in commit
    self._prepare_impl()
  File "<string>", line 2, in _prepare_impl
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/state_changes.py", line 137, in _go
    ret_value = fn(self, *arg, **kw)
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/session.py", line 1290, in _prepare_impl
    self.session.flush()
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/session.py", line 4353, in flush
    self._flush(objects)
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/session.py", line 4488, in _flush
    with util.safe_reraise():
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/util/langhelpers.py", line 122, in __exit__
    raise exc_value.with_traceback(exc_tb)
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/session.py", line 4449, in _flush
    flush_context.execute()
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/unitofwork.py", line 465, in execute
    rec.execute(self)
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/unitofwork.py", line 641, in execute
    util.preloaded.orm_persistence.save_obj(
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/persistence.py", line 94, in save_obj
    _emit_insert_statements(
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/orm/persistence.py", line 1234, in _emit_insert_statements
    result = connection.execute(
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/engine/base.py", line 1421, in execute
    return meth(
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/sql/elements.py", line 526, in _execute_on_connection
    return connection._execute_clauseelement(
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/engine/base.py", line 1643, in _execute_clauseelement
    ret = self._execute_context(
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/engine/base.py", line 1823, in _execute_context
    self._handle_dbapi_exception(
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/engine/base.py", line 2365, in _handle_dbapi_exception
    raise sqlalchemy_exception.with_traceback(exc_info[2]) from e
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/engine/base.py", line 1817, in _execute_context
    context = constructor(
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/engine/default.py", line 1496, in _init_compiled
    flattened_processors[key](compiled_params[key])
  File "/home/cola/Softwares/kanade-bot/.venv/lib/python3.13/site-packages/sqlalchemy/sql/sqltypes.py", line 2802, in process
    return json_serializer(value)
  File "/home/cola/.local/share/uv/python/cpython-3.13.12-linux-x86_64-gnu/lib/python3.13/json/__init__.py", line 235, in dumps
    return _default_encoder.encode(obj)
  File "/home/cola/.local/share/uv/python/cpython-3.13.12-linux-x86_64-gnu/lib/python3.13/json/encoder.py", line 202, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/home/cola/.local/share/uv/python/cpython-3.13.12-linux-x86_64-gnu/lib/python3.13/json/encoder.py", line 263, in iterencode
    return _iterencode(o, 0)
  File "/home/cola/.local/share/uv/python/cpython-3.13.12-linux-x86_64-gnu/lib/python3.13/json/encoder.py", line 182, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
sqlalchemy.exc.StatementError: (builtins.TypeError) Object of type MessageSegment is not JSON serializable
[SQL: INSERT INTO nonebot_plugin_chatrecorder_messagerecord_v2 (session_persist_id, time, type, message_id, message, plain_text) VALUES (?, ?, ?, ?, ?, ?)]
[parameters: [{'message': [{'type': 'node', 'data': {'user_id': '2772953784', 'nickname': '宵崎奏', 'content': [MessageSegment(type='text', data={'text': '……绘名是你的太阳啊。' ... (462 characters truncated) ... e': datetime.datetime(2026, 7, 26, 8, 27, 36, 964212), 'plain_text': '', 'type': 'message_sent', 'message_id': '1371756018', 'session_persist_id': 14}]]

根据日志，报错显示的是这条合并转发消息中的V11 MessageSegment无法序列化。

代码 nonebot_plugin_chatrecorder/adapters/onebot_v11.py 中，对于Message的序列化实现是调用__dict__，这并不是一个最好的实现方式。希望大佬能够修改实现支持合并转发消息的序列化。