已把选课的“年级划分”和限制规则补成完整闭环：

选课批次可指定多个适用年级；留空兼容原有“全部年级”。新增可选的“最多课程门数”，与原有学分上限并行。年级、门数限制统一作用于学生可见批次、自主选课、候补、管理员代选和自动递补。普通候选名单遵守年级及行政班范围；强制选课可绕过业务限制，但仍严格遵守管理员学院权限。管理页面会展示“2026 级 · 最多 6 门 · 最多 30 学分”，名单和候补列表也增加年级列。新增 MySQL 迁移：[CourseSelectionGradeLimits.cs](E:/jiaowu/src/Jiaowu.Api/Infrastructure/Persistence/Migrations/MySql/20260726180000_CourseSelectionGradeLimits.cs)。
2026-07-26 16:12:21 +08:00
parent 56b13b3adb
commit f62cd21319
11 changed files with 4920 additions and 25 deletions
@@ -109,6 +109,89 @@ public sealed class CourseSelectionsControllerTests
            x.Title == "课程候补已结束"));
    }

+    [Fact]
+    public async Task Student_cannot_join_waitlist_outside_the_round_grade_scope()
+    {
+        await using var connection = new SqliteConnection("Data Source=:memory:");
+        await connection.OpenAsync();
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseSqlite(connection)
+            .Options;
+        await using var db = new AppDbContext(options);
+        await db.Database.EnsureCreatedAsync();
+        var data = await SeedFullOfferingAsync(db);
+
+        db.CourseSelectionRoundGrades.Add(new CourseSelectionRoundGrade
+        {
+            CourseSelectionRoundId = data.RoundId,
+            Grade = 2025
+        });
+        await db.SaveChangesAsync();
+
+        var controller = new CourseSelectionsController(
+            db,
+            new StudentDataScope(data.FirstWaiterUserId));
+        var result = await controller.JoinWaitlist(
+            new StudentEnrollmentRequest(data.OfferingId),
+            CancellationToken.None);
+
+        var conflict = Assert.IsType<ConflictObjectResult>(result);
+        var problem = Assert.IsType<ProblemDetails>(conflict.Value);
+        Assert.Equal("你所在的年级不属于本轮选课对象。", problem.Detail);
+        Assert.False(await db.CourseEnrollments.AnyAsync(x =>
+            x.StudentId == data.FirstWaiterStudentId));
+    }
+
+    [Fact]
+    public async Task Updating_round_preserves_an_unchanged_grade_without_duplicate_rows()
+    {
+        await using var connection = new SqliteConnection("Data Source=:memory:");
+        await connection.OpenAsync();
+        var options = new DbContextOptionsBuilder<AppDbContext>()
+            .UseSqlite(connection)
+            .Options;
+        await using var db = new AppDbContext(options);
+        await db.Database.EnsureCreatedAsync();
+        var data = await SeedFullOfferingAsync(db);
+
+        var round = await db.CourseSelectionRounds.FindAsync(data.RoundId);
+        round!.Status = CourseSelectionRoundStatus.Draft;
+        db.CourseSelectionRoundGrades.Add(new CourseSelectionRoundGrade
+        {
+            CourseSelectionRoundId = data.RoundId,
+            Grade = 2026
+        });
+        await db.SaveChangesAsync();
+        db.ChangeTracker.Clear();
+
+        var request = new CourseSelectionRoundRequest(
+            round.AcademicTermId,
+            "2026 级第一轮选课",
+            DateTime.UtcNow.AddHours(-1),
+            DateTime.UtcNow.AddDays(7),
+            DateTime.UtcNow.AddDays(14),
+            30,
+            6,
+            [2026],
+            null);
+        var controller = new CourseSelectionsController(db, new AdminDataScope());
+
+        Assert.IsType<NoContentResult>(await controller.UpdateRound(
+            data.RoundId,
+            request,
+            CancellationToken.None));
+        db.ChangeTracker.Clear();
+        Assert.IsType<NoContentResult>(await controller.UpdateRound(
+            data.RoundId,
+            request,
+            CancellationToken.None));
+        Assert.Equal(
+            1,
+            await db.CourseSelectionRoundGrades.CountAsync(x =>
+                x.CourseSelectionRoundId == data.RoundId &&
+                x.Grade == 2026));
+    }
+
    private static async Task<SeededSelection> SeedFullOfferingAsync(AppDbContext db)
    {
        var college = new College { Code = "CS", Name = "计算机学院" };