src/Jiaowu.Api/Controllers/ExperimentsController.cs

@@ -1308,6 +1308,104 @@ public sealed class ExperimentsController(
             IsolationLevel.Serializable);
     }
 
+    [HttpPost("sessions/{id:guid}/proxy-bookings/batch")]
+    [Authorize(Roles = Managers)]
+    public async Task<ActionResult> CreateProxyBookings(
+        Guid id,
+        ProxyExperimentBookingBatchRequest request,
+        CancellationToken cancellationToken)
+    {
+        var studentIds = request.StudentIds.Distinct().ToArray();
+        if (studentIds.Length == 0)
+            return ValidationProblem("请至少选择一名学生。");
+        if (studentIds.Length > 100)
+            return ValidationProblem("单次最多可代选 100 名学生。");
+
+        return await db.ExecuteInRetriableTransactionAsync<ActionResult>(
+            async transaction =>
+            {
+                db.ChangeTracker.Clear();
+                var session = await LoadManagedSessionAsync(id, cancellationToken);
+                if (session is null) return NotFound();
+                if (!CanManageSession(session)) return Forbid();
+                if (session.Status != ExperimentSessionStatus.Scheduled ||
+                    session.ExperimentProject!.Status != ExperimentProjectStatus.Published ||
+                    session.ExperimentProject.ArrangementMode != ExperimentArrangementMode.SelfScheduled)
+                    return ConflictProblem("只能为已发布的自行安排实验场次代选学生。");
+
+                var students = await db.Students
+                    .WhereIn(studentIds, x => x.Id)
+                    .OrderBy(x => x.StudentNumber)
+                    .ToListAsync(cancellationToken);
+                if (students.Count != studentIds.Length)
+                    return ValidationProblem("存在无效的学生档案。");
+                var inactive = students.FirstOrDefault(x => x.Status != StudentStatus.Active);
+                if (inactive is not null)
+                    return ConflictProblem($"学生 {inactive.StudentNumber} {inactive.Name} 当前不是在籍状态。");
+
+                var roster = await TeachingTaskRosterQuery.LoadForTasksAsync(
+                    db, [session.ExperimentProject.TeachingTaskId], cancellationToken);
+                var eligibleStudentIds = roster.Select(x => x.StudentId).ToHashSet();
+                var outOfRoster = students.FirstOrDefault(x => !eligibleStudentIds.Contains(x.Id));
+                if (outOfRoster is not null)
+                    return ConflictProblem($"学生 {outOfRoster.StudentNumber} {outOfRoster.Name} 不在本实验项目的教学任务名单内。");
+
+                var existingBookings = await db.ExperimentBookings
+                    .Where(x => x.ExperimentProjectId == session.ExperimentProjectId)
+                    .WhereIn(studentIds, x => x.StudentId)
+                    .ToListAsync(cancellationToken);
+                var booked = existingBookings.FirstOrDefault(x =>
+                    x.Status == ExperimentBookingStatus.Booked);
+                if (booked is not null)
+                {
+                    var student = students.First(x => x.Id == booked.StudentId);
+                    return ConflictProblem(booked.ExperimentSessionId == session.Id
+                        ? $"学生 {student.StudentNumber} {student.Name} 已预约本实验场次。"
+                        : $"学生 {student.StudentNumber} {student.Name} 已预约本实验项目的其他场次。");
+                }
+
+                foreach (var student in students)
+                {
+                    var scheduleProblem = await StudentConflictAsync(student.Id, session, cancellationToken);
+                    if (scheduleProblem is not null)
+                        return ConflictProblem($"学生 {student.StudentNumber} {student.Name}：{scheduleProblem}");
+                }
+
+                var reservedCount = await db.ExperimentBookings.CountAsync(x =>
+                    x.ExperimentSessionId == session.Id && x.Status == ExperimentBookingStatus.Booked,
+                    cancellationToken);
+                if (reservedCount + students.Count > session.Capacity)
+                    return ConflictProblem($"该实验场次仅剩 {Math.Max(0, session.Capacity - reservedCount)} 个名额，无法完成本次代选。");
+
+                foreach (var student in students)
+                {
+                    var existing = existingBookings.FirstOrDefault(x => x.StudentId == student.Id);
+                    if (existing is null)
+                    {
+                        db.ExperimentBookings.Add(new ExperimentBooking
+                        {
+                            ExperimentProjectId = session.ExperimentProjectId,
+                            ExperimentSessionId = session.Id,
+                            StudentId = student.Id
+                        });
+                    }
+                    else
+                    {
+                        existing.ExperimentSessionId = session.Id;
+                        existing.Status = ExperimentBookingStatus.Booked;
+                        existing.BookedAt = DateTime.UtcNow;
+                        existing.CancelledAt = null;
+                    }
+                }
+                session.ReservedCount = reservedCount + students.Count;
+                await db.SaveChangesAsync(cancellationToken);
+                await transaction.CommitAsync(cancellationToken);
+                return Ok(new { BookedCount = students.Count });
+            },
+            cancellationToken,
+            IsolationLevel.Serializable);
+    }
+
     [HttpPost("sessions/{id:guid}/book")]
     [Authorize(Roles = SystemRoles.Student)]
     public async Task<ActionResult> Book(
@@ -1967,6 +2065,9 @@ public sealed record ExperimentSessionRequest(
 
 public sealed record ProxyExperimentBookingRequest(Guid StudentId);
 
+public sealed record ProxyExperimentBookingBatchRequest(
+    [Required, MinLength(1)] IReadOnlyCollection<Guid> StudentIds);
+
 public sealed record ExperimentSessionBatchRequest(
     [Required] IReadOnlyList<ExperimentSessionBatchItem> Items);
 

tests/Jiaowu.Api.Tests/ExperimentsControllerTests.cs

@@ -427,6 +427,41 @@ public sealed class ExperimentsControllerTests
             x.Status == ExperimentBookingStatus.Booked));
     }
 
+    [Fact]
+    public async Task ManagerCanProxyBookMultipleStudentsForASelfScheduledSession()
+    {
+        await using var fixture = await ExperimentFixture.CreateAsync();
+        var manager = fixture.Controller(fixture.ManagerScope);
+        await manager.CreateProject(
+            fixture.ProjectRequest(ExperimentArrangementMode.SelfScheduled),
+            CancellationToken.None);
+        var project = await fixture.Db.ExperimentProjects.SingleAsync();
+        await manager.CreateSession(
+            project.Id, fixture.SessionRequest(3, 2, 3), CancellationToken.None);
+        await manager.PublishProject(project.Id, CancellationToken.None);
+        var session = await fixture.Db.ExperimentSessions.SingleAsync();
+        var originalStudent = await fixture.Db.Students.SingleAsync();
+        fixture.Db.Students.Add(new Student
+        {
+            StudentNumber = "20990002",
+            Name = "第二名实验学生",
+            AdministrativeClassId = originalStudent.AdministrativeClassId,
+            EnrollmentYear = originalStudent.EnrollmentYear,
+            EnrollmentDate = originalStudent.EnrollmentDate
+        });
+        await fixture.Db.SaveChangesAsync();
+        var studentIds = await fixture.Db.Students.Select(x => x.Id).ToListAsync();
+
+        var result = await manager.CreateProxyBookings(
+            session.Id, new ProxyExperimentBookingBatchRequest(studentIds), CancellationToken.None);
+
+        var response = Assert.IsType<OkObjectResult>(result);
+        Assert.Equal(studentIds.Count, response.Value!.GetType().GetProperty("BookedCount")!.GetValue(response.Value));
+        Assert.Equal(studentIds.Count, await fixture.Db.ExperimentBookings.CountAsync(x =>
+            x.ExperimentSessionId == session.Id &&
+            x.Status == ExperimentBookingStatus.Booked));
+    }
+
     [Fact]
     public async Task StudentBooking_RejectsPublishedTimetableConflict()
     {

web/src/views/ExperimentsView.vue

@@ -82,7 +82,7 @@ const proxyBookingDialog = ref(false)
 const proxyBookingStudents = ref<any[]>([])
 const proxyBookingLoading = ref(false)
 const proxyBookingKeyword = ref('')
-const proxyBookingStudentId = ref('')
+const proxyBookingStudentIds = ref<string[]>([])
 
 const selectedTask = computed(() =>
   options.tasks.find((task) => task.id === projectForm.teachingTaskIds[0]),
@@ -635,22 +635,22 @@ async function loadProxyBookingStudents() {
 }
 
 async function openProxyBooking() {
-  proxyBookingStudentId.value = ''
+  proxyBookingStudentIds.value = []
   proxyBookingKeyword.value = ''
   proxyBookingDialog.value = true
   await loadProxyBookingStudents()
 }
 
 async function saveProxyBooking() {
-  if (!participantSession.value || !proxyBookingStudentId.value) {
+  if (!participantSession.value || !proxyBookingStudentIds.value.length) {
     ElMessage.warning('请选择需要代选场次的学生')
     return
   }
   try {
-    await http.post(`/experiments/sessions/${participantSession.value.id}/proxy-bookings`, {
-      studentId: proxyBookingStudentId.value,
+    const { data } = await http.post(`/experiments/sessions/${participantSession.value.id}/proxy-bookings/batch`, {
+      studentIds: proxyBookingStudentIds.value,
     })
-    ElMessage.success('已为该学生代选实验场次')
+    ElMessage.success(`已为 ${data.bookedCount} 名学生代选实验场次`)
     proxyBookingDialog.value = false
     await showParticipants(participantSession.value.project, participantSession.value)
   } catch (error) {
@@ -1518,10 +1518,13 @@ onMounted(async () => {
         <el-input v-model="proxyBookingKeyword" clearable placeholder="输入学号、姓名或行政班" @keyup.enter="loadProxyBookingStudents" />
         <el-button @click="loadProxyBookingStudents">查询</el-button>
       </div>
-      <el-table v-loading="proxyBookingLoading" :data="proxyBookingStudents" max-height="400" @current-change="(row) => proxyBookingStudentId = row?.studentId ?? ''">
-        <el-table-column width="54">
-          <template #default="{ row }"><el-radio v-model="proxyBookingStudentId" :value="row.studentId" /></template>
-        </el-table-column>
+      <el-table
+        v-loading="proxyBookingLoading"
+        :data="proxyBookingStudents"
+        max-height="400"
+        @selection-change="(rows) => proxyBookingStudentIds = rows.map((row) => row.studentId)"
+      >
+        <el-table-column type="selection" width="54" />
         <el-table-column prop="studentNumber" label="学号" min-width="130" />
         <el-table-column prop="name" label="姓名" min-width="100" />
         <el-table-column prop="className" label="行政班" min-width="180" />
@@ -1529,7 +1532,9 @@ onMounted(async () => {
       <el-empty v-if="!proxyBookingLoading && !proxyBookingStudents.length" description="没有可代选的学生" />
       <template #footer>
         <el-button @click="proxyBookingDialog = false">取消</el-button>
-        <el-button type="primary" :disabled="!proxyBookingStudentId" @click="saveProxyBooking">确认代选</el-button>
+        <el-button type="primary" :disabled="!proxyBookingStudentIds.length" @click="saveProxyBooking">
+          确认代选（{{ proxyBookingStudentIds.length }}）
+        </el-button>
       </template>
     </el-dialog>
   </div>