refactor: remove enable_lock attribute and enhance locking mechanism in Model class

zhenxun/models/ban_console.py

@@ -42,8 +42,6 @@ class BanConsole(Model):
     """缓存类型"""
     cache_key_field = ("user_id", "group_id")
     """缓存键字段"""
-    enable_lock: ClassVar[list[DbLockType]] = [DbLockType.CREATE, DbLockType.UPSERT]
-    """开启锁"""
     lock_fields: ClassVar[dict[DbLockType, tuple[str, str]]] = {
         DbLockType.CREATE: ("user_id", "group_id"),
         DbLockType.UPSERT: ("user_id", "group_id"),

zhenxun/models/group_console.py

@@ -96,8 +96,6 @@ class GroupConsole(Model):
     """缓存类型"""
     cache_key_field = ("group_id", "channel_id")
     """缓存键字段"""
-    enable_lock: ClassVar[list[DbLockType]] = [DbLockType.CREATE, DbLockType.UPSERT]
-    """开启锁"""
     lock_fields: ClassVar[dict[DbLockType, tuple[str, str]]] = {
         DbLockType.CREATE: ("group_id", "channel_id"),
         DbLockType.UPSERT: ("group_id", "channel_id"),

zhenxun/services/__init__.py

@@ -94,7 +94,6 @@ __all__ = [
 
 
 async def cancel_pending_tasks():
-    """仅取消 zhenxun 业务协程，避免干扰框架的关机流程。"""
     loop = asyncio.get_running_loop()
     current = asyncio.current_task(loop=loop)
     pending = []

zhenxun/services/db_context/base_model.py

@@ -22,11 +22,13 @@ class Model(TortoiseModel):
     增强的ORM基类，解决锁嵌套问题
     """
 
-    # sem_data[cls_name][lock_type] 可以是 Semaphore（全局）
+    # sem_data[cls][lock_type] 可以是 Semaphore（全局）
     # 或 dict[key, Semaphore]（按键）
-    sem_data: ClassVar[dict[str, dict[str, Any]]] = {}
-    # 跟踪当前协程持有的锁 (lock_type, lock_key)
-    _current_locks: ClassVar[dict[int, tuple[DbLockType, Any | None]]] = {}
+    sem_data: ClassVar[dict[type["Model"], dict[DbLockType, Any]]] = {}
+    # 跟踪当前协程持有的锁集合 {(cls, lock_type, lock_key), ...}
+    _current_locks: ClassVar[
+        dict[int, set[tuple[type["Model"], DbLockType, Any | None]]]
+    ] = {}
 
     def __init_subclass__(cls, **kwargs):
         super().__init_subclass__(**kwargs)
@@ -81,14 +83,26 @@ class Model(TortoiseModel):
 
     @classmethod
     def get_semaphore(cls, lock_type: DbLockType, lock_key: Any | None = None):
-        enable_lock = getattr(cls, "enable_lock", None)
-        if not enable_lock or lock_type not in enable_lock:
+        """
+        获取信号量
+
+        设计约定（弃用 enable_lock，仅通过 lock_fields 控制是否启用锁）:
+        - 如果未配置 lock_fields，或其中不存在对应 lock_type，则不加锁
+        - 如果 lock_fields[lock_type] 配置了按字段的锁（如 tuple[str, ...]），
+          则调用处按字段值生成 lock_key，在此为不同 lock_key
+          分配不同信号量，实现「按键」互斥
+        - 如仅需全局锁，可在 lock_fields 中声明该 lock_type，
+          且在 _lock_context 传入 lock_key=None
+        """
+        lock_fields: dict[DbLockType, Any] = getattr(cls, "lock_fields", {}) or {}
+        # 未在 lock_fields 中声明的 lock_type 不加锁
+        if lock_type not in lock_fields:
             return None
 
-        cls_sem = cls.sem_data.setdefault(cls.__name__, {})
-        # 是否配置了按字段的锁
-        lock_fields: dict[DbLockType, Any] = getattr(cls, "lock_fields", {}) or {}
-        if lock_type in lock_fields and lock_key is not None:
+        cls_sem = cls.sem_data.setdefault(cls, {})
+
+        # 配置了按字段的锁并且提供了具体的 lock_key 时，使用「按键」锁
+        if lock_key is not None:
             keyed = cls_sem.setdefault(lock_type, {})
             if not isinstance(keyed, dict):
                 # 兼容历史数据，重置为按键字典
@@ -109,7 +123,13 @@ class Model(TortoiseModel):
     def _require_lock(cls, lock_type: DbLockType, lock_key: Any | None) -> bool:
         """检查是否需要真正加锁"""
         task_id = id(asyncio.current_task())
-        return cls._current_locks.get(task_id) != (lock_type, lock_key)
+        held = cls._current_locks.get(task_id)
+        if not held:
+            return True
+        # 同一协程内，如果已经持有完全相同的一把锁
+        # （同一模型 + 同一 lock_type + 同一 lock_key），视为重入，
+        # 不再重复加锁，避免自锁
+        return (cls, lock_type, lock_key) not in held
 
     @classmethod
     @contextlib.asynccontextmanager
@@ -118,13 +138,28 @@ class Model(TortoiseModel):
         task_id = id(asyncio.current_task())
         need_lock = cls._require_lock(lock_type, lock_key)
 
-        if need_lock and (sem := cls.get_semaphore(lock_type, lock_key)):
-            cls._current_locks[task_id] = (lock_type, lock_key)
+        if not need_lock:
+            # 已经持有这把锁，直接透传，支持可重入
+            yield
+            return
+
+        sem = cls.get_semaphore(lock_type, lock_key)
+        if not sem:
+            # 对于未启用锁的场景，直接继续执行
+            yield
+            return
+
+        lock_id = (cls, lock_type, lock_key)
+        held = cls._current_locks.setdefault(task_id, set())
+        held.add(lock_id)
+        try:
             async with sem:
                 yield
-            cls._current_locks.pop(task_id, None)
-        else:
-            yield
+        finally:
+            # 安全移除当前锁记录
+            held.discard(lock_id)
+            if not held:
+                cls._current_locks.pop(task_id, None)
 
     @classmethod
     async def create(