From 15c5464069ce76b840b3959d3923558a2d4fd3a2 Mon Sep 17 00:00:00 2001
From: Ju4tCode <42488585+yanyongyu@users.noreply.github.com>
Date: Thu, 31 Oct 2024 12:47:29 +0800
Subject: [PATCH] =?UTF-8?q?:sparkles:=20Feature:=20=E8=B7=B3=E8=BF=87?=
 =?UTF-8?q?=E9=83=A8=E5=88=86=E9=9D=9E=E5=BF=85=E8=A6=81=E7=9A=84=20task?=
 =?UTF-8?q?=20group=20=E5=88=9B=E5=BB=BA=20(#3095)?=
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---
 nonebot/dependencies/__init__.py    | 18 ++++++++++++------
 nonebot/internal/driver/abstract.py |  6 ++++++
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/nonebot/dependencies/__init__.py b/nonebot/dependencies/__init__.py
index da02f531..7c6f58c0 100644
--- a/nonebot/dependencies/__init__.py
+++ b/nonebot/dependencies/__init__.py
@@ -182,13 +182,17 @@ class Dependent(Generic[R]):
         return cls(call, params, parameterless_params)
 
     async def check(self, **params: Any) -> None:
-        async with anyio.create_task_group() as tg:
-            for param in self.parameterless:
-                tg.start_soon(partial(param._check, **params))
+        if self.parameterless:
+            async with anyio.create_task_group() as tg:
+                for param in self.parameterless:
+                    tg.start_soon(partial(param._check, **params))
 
-        async with anyio.create_task_group() as tg:
-            for param in self.params:
-                tg.start_soon(partial(cast(Param, param.field_info)._check, **params))
+        if self.params:
+            async with anyio.create_task_group() as tg:
+                for param in self.params:
+                    tg.start_soon(
+                        partial(cast(Param, param.field_info)._check, **params)
+                    )
 
     async def _solve_field(self, field: ModelField, params: dict[str, Any]) -> Any:
         param = cast(Param, field.field_info)
@@ -205,6 +209,8 @@ class Dependent(Generic[R]):
 
         # solve param values
         result: dict[str, Any] = {}
+        if not self.params:
+            return result
 
         async def _solve_field(field: ModelField, params: dict[str, Any]) -> None:
             value = await self._solve_field(field, params)
diff --git a/nonebot/internal/driver/abstract.py b/nonebot/internal/driver/abstract.py
index 257fc5e9..994abc5d 100644
--- a/nonebot/internal/driver/abstract.py
+++ b/nonebot/internal/driver/abstract.py
@@ -158,6 +158,9 @@ class Driver(abc.ABC):
             raise RuntimeError(f"Duplicate bot connection with id {bot.self_id}")
         self._bots[bot.self_id] = bot
 
+        if not self._bot_connection_hook:
+            return
+
         def handle_exception(exc_group: BaseExceptionGroup) -> None:
             for exc in flatten_exception_group(exc_group):
                 logger.opt(colors=True, exception=exc).error(
@@ -186,6 +189,9 @@ class Driver(abc.ABC):
         if bot.self_id in self._bots:
             del self._bots[bot.self_id]
 
+        if not self._bot_disconnection_hook:
+            return
+
         def handle_exception(exc_group: BaseExceptionGroup) -> None:
             for exc in flatten_exception_group(exc_group):
                 logger.opt(colors=True, exception=exc).error(