方法增加

Common/Redis/RedisService.cs

@@ -54,5 +54,28 @@ namespace LY.App.Common.Redis
         {
             return await _db.KeyExistsAsync(key);
         }
+        /// <summary>
+        /// 获取数据，如果不存在则从数据源获取并存入 Redis
+        /// </summary>
+        /// <typeparam name="T">数据类型</typeparam>
+        /// <param name="key">Redis Key</param>
+        /// <param name="factory">数据源方法</param>
+        /// <param name="expiry">可选的过期时间</param>
+        /// <returns>获取到的值</returns>
+        public async Task<T?> GetOrSetAsync<T>(string key, Func<Task<T>> factory, TimeSpan? expiry = null)
+        {
+            var value = await GetAsync<T>(key);
+            if (value is not null)
+            {
+                return value;
+            }
+
+            value = await factory();
+            if (value is not null)
+            {
+                await SetAsync(key, value, expiry);
+            }
+            return value;
+        }
     }
 }