deepseek

2 处改动：

  1. ValidateRequestAsync — 当 classIds 为空时跳过行政班验证（选修课可不选班）
  2. ValidatePublishingTasksAsync — 移除了"发布前至少需要关联一个行政班"的强制校验，允许无行政班的教学任务直接发布

src/Jiaowu.Api/Controllers/TeachingTasksController.cs

@@ -614,12 +614,15 @@ public sealed class TeachingTasksController(
             return ValidationProblem("授课教师必须已完成该课程申报并经学院审核通过。");
 
         var classIds = request.ClassIds.Distinct().ToArray();
-        var classes = db.AdministrativeClasses.AsNoTracking()
-            .Where(x => classIds.Contains(x.Id));
-        if (collegeId.HasValue)
-            classes = classes.Where(x => x.Major!.CollegeId == collegeId.Value);
-        if (await classes.CountAsync(cancellationToken) != classIds.Length)
-            return ValidationProblem("存在无效或不在当前数据范围内的行政班。");
+        if (classIds.Length > 0)
+        {
+            var classes = db.AdministrativeClasses.AsNoTracking()
+                .Where(x => classIds.Contains(x.Id));
+            if (collegeId.HasValue)
+                classes = classes.Where(x => x.Major!.CollegeId == collegeId.Value);
+            if (await classes.CountAsync(cancellationToken) != classIds.Length)
+                return ValidationProblem("存在无效或不在当前数据范围内的行政班。");
+        }
         return null;
     }
 
@@ -661,13 +664,6 @@ public sealed class TeachingTasksController(
                 invalidPrimaryTeacher,
                 "发布前必须指定且只能指定一名主讲教师。");
 
-        var missingClass = tasks.FirstOrDefault(x => x.Classes.Count == 0);
-        if (missingClass is not null)
-            return PublishingProblem(
-                tasks,
-                missingClass,
-                "发布前至少需要关联一个行政班。");
-
         var termIds = tasks.Select(x => x.AcademicTermId).Distinct().ToArray();
         var courseIds = tasks.Select(x => x.CourseId).Distinct().ToArray();
         var teacherIds = tasks