考试取消，学习记录与考试解绑

Tiobon.Core.Services/Ghre/Ghre_ExamServices.cs

@@ -1410,6 +1410,15 @@ public class Ghre_ExamServices : BaseServices<Ghre_Exam, Ghre_ExamDto, InsertGhr
                 await GenerateStudy(id);
             #endregion
 
+            #region 考试取消，学习记录与考试解绑
+            if (entity.Status == DIC_EXAM_STATUS.RELEASED && status == DIC_EXAM_STATUS.DRAFT)
+                await Db.Updateable<Ghre_StudyRecord>()
+                        .SetColumns(it => new Ghre_StudyRecord() { ExamId = null })
+                        .Where(it => it.ExamId != null && it.ExamId == id)
+                        .ExecuteCommandAsync();
+
+            #endregion
+
             if (status == DIC_EXAM_STATUS.RELEASED || status == DIC_EXAM_STATUS.DISABLED || status == DIC_EXAM_STATUS.DRAFT)
             {
                 entity.Status = status;