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服务器端分页优化

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biss
2026-08-11 11:46:26 +08:00 Unverified
parent 292d029459
commit 83103eebb8
7 changed files with 287 additions and 50 deletions
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src/Jiaowu.Api/Controllers/ApprovalsController.cs
+34 -3
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@@ -1,4 +1,5 @@
using System.ComponentModel.DataAnnotations;
using Jiaowu.Api.Contracts;
using Jiaowu.Api.Domain.Academic;
using Jiaowu.Api.Domain.Identity;
using Jiaowu.Api.Domain.System;
@@ -23,43 +24,73 @@ public sealed class ApprovalsController(AppDbContext db, ICurrentUserDataScope s
// ═══════════════ Aggregated pending ═══════════════
[HttpGet("pending")]
[Authorize(Roles = Managers)]
public async Task<ActionResult> GetPending(CancellationToken ct)
public async Task<ActionResult<PagedResult<ApprovalItem>>> GetPending(
int page = 1,
int pageSize = 20,
CancellationToken ct = default)
{
var items = new List<ApprovalItem>();
if (page < 1 || pageSize is < 1 or > 100)
return ValidationProblem("page 必须大于 0，pageSize 必须在 1 到 100 之间。");
var take = checked(page * pageSize);
var total = 0;
var items = new List<ApprovalItem>(take * 8);
items.AddRange(await Scoped<CourseExemption>(x => x.Status == ApprovalStatus.Submitted)
.OrderByDescending(x => x.SubmittedAt).Take(take)
.Select(x => new ApprovalItem(x.Id, "CourseExemption", "免修", $"{x.Student!.Name} — 《{x.TeachingTask!.Course!.Name}》", x.Reason, x.SubmittedAt, x.TeachingTask.Course!.College!.Name))
.ToListAsync(ct));
total += await Scoped<CourseExemption>(x => x.Status == ApprovalStatus.Submitted).CountAsync(ct);
items.AddRange(await Scoped<DeferredExam>(x => x.Status == ApprovalStatus.Submitted)
.OrderByDescending(x => x.SubmittedAt).Take(take)
.Select(x => new ApprovalItem(x.Id, "DeferredExam", "缓考", $"{x.Student!.Name} — 《{x.TeachingTask!.Course!.Name}》", x.Reason, x.SubmittedAt, x.TeachingTask.Course!.College!.Name))
.ToListAsync(ct));
total += await Scoped<DeferredExam>(x => x.Status == ApprovalStatus.Submitted).CountAsync(ct);
items.AddRange(await Scoped<GradeModification>(x => x.Status == GradeModificationStatus.TeacherSubmitted || x.Status == GradeModificationStatus.CollegeApproved)
.OrderByDescending(x => x.SubmittedAt).Take(take)
.Select(x => new ApprovalItem(x.Id, "GradeModification", "成绩修改", $"{x.GradeRecord!.Student!.Name} — 《{x.GradeRecord.GradeSheet!.TeachingTask!.Course!.Name}》", $"{x.CurrentScore} → {x.RequestedScore}：{x.Reason}", x.SubmittedAt, x.GradeRecord.GradeSheet.TeachingTask.Course!.College!.Name))
.ToListAsync(ct));
total += await Scoped<GradeModification>(x => x.Status == GradeModificationStatus.TeacherSubmitted || x.Status == GradeModificationStatus.CollegeApproved).CountAsync(ct);
items.AddRange(await Scoped<CourseSubstitution>(x => x.Status == ApprovalStatus.Submitted)
.OrderByDescending(x => x.SubmittedAt).Take(take)
.Select(x => new ApprovalItem(x.Id, "CourseSubstitution", "课程替代", $"{x.Student!.Name}：{x.SubstituteCourse!.Name} → {x.OriginalCourse!.Name}", x.Reason, x.SubmittedAt, x.Student.AdministrativeClass!.Major!.College!.Name))
.ToListAsync(ct));
total += await Scoped<CourseSubstitution>(x => x.Status == ApprovalStatus.Submitted).CountAsync(ct);
items.AddRange(await Scoped<StudentStatusChange>(x => x.State != StudentStatusChangeState.Approved && x.State != StudentStatusChangeState.Rejected && x.State != StudentStatusChangeState.Cancelled)
.OrderByDescending(x => x.SubmittedAt).Take(take)
.Select(x => new ApprovalItem(x.Id, "StudentStatusChange", "学籍异动", $"{x.Student!.Name} — {SSCLabel(x.Type)}", x.Reason, x.SubmittedAt, x.Student.AdministrativeClass!.Major!.College!.Name))
.ToListAsync(ct));
total += await Scoped<StudentStatusChange>(x => x.State != StudentStatusChangeState.Approved && x.State != StudentStatusChangeState.Rejected && x.State != StudentStatusChangeState.Cancelled).CountAsync(ct);
items.AddRange(await Scoped<CourseAdjustment>(x => x.Status == CourseAdjustmentStatus.Submitted)
.OrderByDescending(x => x.SubmittedAt).Take(take)
.Select(x => new ApprovalItem(x.Id, "CourseAdjustment", CALabel(x.Type), $"《{x.TeachingTask!.Course!.Name}》", x.Reason, x.SubmittedAt!.Value, x.TeachingTask.Course.College!.Name))
.ToListAsync(ct));
total += await Scoped<CourseAdjustment>(x => x.Status == CourseAdjustmentStatus.Submitted).CountAsync(ct);
items.AddRange(await Scoped<GradeSheet>(x => x.Status == GradeSheetStatus.Submitted)
.OrderByDescending(x => x.SubmittedAt).Take(take)
.Select(x => new ApprovalItem(x.Id, "GradeSheet", "成绩审核", $"《{x.TeachingTask!.Course!.Name}》— {x.Records.Count}人", "教师已提交成绩", x.SubmittedAt!.Value, x.TeachingTask.Course.College!.Name))
.ToListAsync(ct));
total += await Scoped<GradeSheet>(x => x.Status == GradeSheetStatus.Submitted).CountAsync(ct);
items.AddRange(await Scoped<AttendanceRecord>(x => x.AppealStatus == AttendanceAppealStatus.Pending)
.OrderByDescending(x => x.AppealSubmittedAt).Take(take)
.Select(x => new ApprovalItem(x.StudentId, "AttendanceAppeal", "考勤申诉", $"{x.Student!.Name} — 《{x.AttendanceSheet!.TeachingTask!.Course!.Name}》", x.AppealReason ?? "", x.AppealSubmittedAt!.Value, x.Student.AdministrativeClass!.Major!.College!.Name))
.ToListAsync(ct));
total += await Scoped<AttendanceRecord>(x => x.AppealStatus == AttendanceAppealStatus.Pending).CountAsync(ct);
return Ok(items.OrderByDescending(x => x.Time).ToList());
var pageItems = items
.OrderByDescending(x => x.Time)
.ThenByDescending(x => x.Id)
.Skip((page - 1) * pageSize)
.Take(pageSize)
.ToArray();
return Ok(new PagedResult<ApprovalItem>(pageItems, total, page, pageSize));
}
// ═══════════════ Course Exemption ═══════════════