's'

app/api/join/route.ts

@@ -133,6 +133,28 @@ async function tryPocketBaseDirect(
 
   const pb = getPocketBaseConfig();
   const base = pb.url.replace(/\/$/, "");
+  const wechatId = String(record.wechatId ?? "").trim();
+  if (wechatId) {
+    const escaped = wechatId.replace(/\\/g, "\\\\").replace(/"/g, '\\"');
+    const filter = encodeURIComponent(`wechatId = "${escaped}"`);
+    const checkRes = await fetch(
+      `${base}/api/collections/${pb.joinCollection}/records?filter=${filter}&perPage=1`,
+      {
+        headers: { Authorization: `Bearer ${token}` },
+        cache: "no-store",
+      }
+    );
+    if (checkRes.ok) {
+      const checkData = await checkRes.json();
+      if (Array.isArray((checkData as { items?: unknown[] }).items) && (checkData as { items: unknown[] }).items.length > 0) {
+        return NextResponse.json(
+          { ok: false, error: "该微信号已报名，请勿重复提交" },
+          { status: 400 }
+        );
+      }
+    }
+  }
+
   const url = `${base}/api/collections/${pb.joinCollection}/records`;
 
   const qualify = !!(record.qualify ?? false);