From c2ae0979beec42046f9a1ca60c51ba4c8ef5e0e7 Mon Sep 17 00:00:00 2001
From: JSR <pandajsr72@gmail.com>
Date: Sat, 21 Mar 2026 11:09:40 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8DMCP=E5=AD=A6=E7=94=9F?=
 =?UTF-8?q?=E5=88=97=E8=A1=A8limit=E4=B8=BA=E7=A9=BA=E5=AF=BC=E8=87=B4Post?=
 =?UTF-8?q?greSQL=E6=BA=A2=E5=87=BA=E5=B4=A9=E6=BA=83?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src-tauri/src/commands/mcp.rs | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src-tauri/src/commands/mcp.rs b/src-tauri/src/commands/mcp.rs
index 0fe5cba..b5d7ff3 100644
--- a/src-tauri/src/commands/mcp.rs
+++ b/src-tauri/src/commands/mcp.rs
@@ -512,14 +512,14 @@ async fn mcp_list_students(
     }
     .ok_or_else(|| "Database not connected".to_string())?;
 
-    let limit = args.limit.unwrap_or(u64::MAX);
+    let mut query = students::Entity::find().order_by_asc(students::Column::Name);
+    if let Some(limit) = args.limit {
+        // 防止极大值在 PostgreSQL 绑定参数时溢出导致 panic。
+        let safe_limit = limit.min(i64::MAX as u64);
+        query = query.limit(safe_limit);
+    }
 
-    let rows = students::Entity::find()
-        .order_by_asc(students::Column::Name)
-        .limit(limit)
-        .all(&db_conn)
-        .await
-        .map_err(|e| e.to_string())?;
+    let rows = query.all(&db_conn).await.map_err(|e| e.to_string())?;
 
     let students = rows
         .into_iter()