代码优化

Tiobon.Core.Services/Ghre/Ghre_QuestionServices.cs

@@ -37,18 +37,14 @@ public class Ghre_QuestionServices : BaseServices<Ghre_Question, Ghre_QuestionDt
     {
         var data1 = await BaseDal.QueryFilterPage(body);
         var data = Mapper.Map(data1.result.DT_TableDataT1).ToANew<List<Ghre_QuestionDto>>();
-        var courseIds = data.Where(x => x.CourseId != null).Select(x => x.CourseId).ToList();
+        var courseIds = data.Where(x => x.CourseId != null).Select(x => x.CourseId).Distinct().ToList();
 
         var courses = await _ghre_CourseServices.Query(x => courseIds.Contains(x.Id));
-        var classs = await _ghre_CourseClassServices.Query();
+        var classsIds = courses.Select(x => x.CourseClassId).Distinct().ToList();
+        var classs = await _ghre_CourseClassServices.Query(x => classsIds.Contains(x.Id));
         data.ForEach(x =>
         {
-            if (x.DifficultyLevel == "Easy")
-                x.DifficultyLevel = "简单";
-            else if (x.DifficultyLevel == "Normal")
-                x.DifficultyLevel = "普通";
-            else if (x.DifficultyLevel == "Hard")
-                x.DifficultyLevel = "困难";
+            x.DifficultyLevel = ConvertDifficultyLevel(x.DifficultyLevel);
             x.QuestionType = ConvertQuestionType(x.QuestionType);
 
             if (x.CourseId != null)