修复若干bug

go/services/operation_log_user.go

@@ -37,3 +37,33 @@ func OperationLogUser(tid *uint64, userID uint64) (account, name string) {
 	}
 	return account, name
 }
+
+type operationLogUserKey struct {
+	tid uint64
+	uid uint64
+}
+
+// OperationLogUserResolver 请求级缓存的操作人解析器。
+// 日志列表逐行调用 OperationLogUser 时，同一 (tid,userID) 会重复执行
+// FindLegacyUID + 用户表查询（N+1），用它按键去重后每个用户只查一次。
+type OperationLogUserResolver struct {
+	cache map[operationLogUserKey][2]string
+}
+
+func NewOperationLogUserResolver() *OperationLogUserResolver {
+	return &OperationLogUserResolver{cache: make(map[operationLogUserKey][2]string)}
+}
+
+func (r *OperationLogUserResolver) Resolve(tid *uint64, userID uint64) (account, name string) {
+	var tidVal uint64
+	if tid != nil {
+		tidVal = *tid
+	}
+	key := operationLogUserKey{tid: tidVal, uid: userID}
+	if v, ok := r.cache[key]; ok {
+		return v[0], v[1]
+	}
+	account, name = OperationLogUser(tid, userID)
+	r.cache[key] = [2]string{account, name}
+	return account, name
+}