史诗级重构！

1 files changed, 12 insertions, 0 deletions

diff --git a/BackEnd/Timeline/Services/BasicTimelineService.cs b/BackEnd/Timeline/Services/BasicTimelineService.cs
index 0d9f64a9..be500135 100644
--- a/BackEnd/Timeline/Services/BasicTimelineService.cs
+++ b/BackEnd/Timeline/Services/BasicTimelineService.cs
@@ -16,6 +16,13 @@ namespace Timeline.Services
     public interface IBasicTimelineService

     {

         /// <summary>

+        /// Check whether a timeline with given id exists without getting full info.

+        /// </summary>

+        /// <param name="id">The timeline id.</param>

+        /// <returns>True if exist. Otherwise false.</returns>

+        Task<bool> CheckExistence(long id);

+

+        /// <summary>

         /// Get the timeline id by name.

         /// </summary>

         /// <param name="timelineName">Timeline name.</param>

@@ -67,6 +74,11 @@ namespace Timeline.Services
             };

         }

 

+        public async Task<bool> CheckExistence(long id)

+        {

+            return await _database.Timelines.AnyAsync(t => t.Id == id);

+        }

+

         public async Task<long> GetTimelineIdByName(string timelineName)

         {

             if (timelineName == null)