优化

src/Jiaowu.Api/Controllers/DegreeAwardsController.cs

@@ -60,8 +60,16 @@ public sealed class DegreeAwardsController(
 
     [HttpGet("batches/{id:guid}")]
     [Authorize(Roles = Reviewers)]
-    public async Task<ActionResult> GetBatch(Guid id, CancellationToken token)
+    public async Task<ActionResult> GetBatch(
+        Guid id,
+        [FromQuery] int page = 1,
+        [FromQuery] int pageSize = 20,
+        [FromQuery] string? keyword = null,
+        [FromQuery] DegreeAwardConclusion? conclusion = null,
+        CancellationToken token = default)
     {
+        page = Math.Max(page, 1);
+        pageSize = Math.Clamp(pageSize, 10, 100);
         var batch = await db.DegreeAwardBatches.AsNoTracking()
             .FirstOrDefaultAsync(x => x.Id == id, token);
         if (batch is null) return NotFound();
@@ -71,6 +79,52 @@ public sealed class DegreeAwardsController(
         if (collegeId.HasValue)
             source = source.Where(x =>
                 x.Student!.AdministrativeClass!.Major!.CollegeId == collegeId);
+
+        var summary = await source
+            .GroupBy(_ => 1)
+            .Select(group => new
+            {
+                ResultCount = group.Count(),
+                GrantedCount = group.Count(x =>
+                    x.Conclusion == DegreeAwardConclusion.Granted),
+                NotGrantedCount = group.Count(x =>
+                    x.Conclusion == DegreeAwardConclusion.NotGranted),
+                OverrideCount = group.Count(x => x.IsOverridden)
+            })
+            .FirstOrDefaultAsync(token);
+
+        var normalizedKeyword = keyword?.Trim();
+        if (!string.IsNullOrWhiteSpace(normalizedKeyword))
+            source = source.Where(x =>
+                x.Student!.StudentNumber.Contains(normalizedKeyword) ||
+                x.Student.Name.Contains(normalizedKeyword) ||
+                x.Student.AdministrativeClass!.Name.Contains(normalizedKeyword) ||
+                x.Student.AdministrativeClass.Major!.Name.Contains(normalizedKeyword));
+        if (conclusion.HasValue)
+            source = source.Where(x => x.Conclusion == conclusion.Value);
+
+        var total = await source.CountAsync(token);
+        var items = await source.OrderBy(x => x.Student!.StudentNumber)
+            .Skip((page - 1) * pageSize)
+            .Take(pageSize)
+            .Select(x => new
+            {
+                x.Id,
+                x.StudentId,
+                x.Student!.StudentNumber,
+                x.Student.Name,
+                ClassName = x.Student.AdministrativeClass!.Name,
+                MajorName = x.Student.AdministrativeClass.Major!.Name,
+                CollegeName = x.Student.AdministrativeClass.Major.College!.Name,
+                x.AverageGradePoint,
+                x.CalculatedConclusion,
+                x.Conclusion,
+                x.ExceptionReason,
+                x.IsOverridden,
+                x.ReviewComment,
+                x.ReviewedAt
+            }).ToListAsync(token);
+
         return Ok(new
         {
             batch.Id,
@@ -82,24 +136,17 @@ public sealed class DegreeAwardsController(
             batch.Notes,
             batch.CalculatedAt,
             batch.PublishedAt,
-            Results = await source.OrderBy(x => x.Student!.StudentNumber)
-                .Select(x => new
-                {
-                    x.Id,
-                    x.StudentId,
-                    x.Student!.StudentNumber,
-                    x.Student.Name,
-                    ClassName = x.Student.AdministrativeClass!.Name,
-                    MajorName = x.Student.AdministrativeClass.Major!.Name,
-                    CollegeName = x.Student.AdministrativeClass.Major.College!.Name,
-                    x.AverageGradePoint,
-                    x.CalculatedConclusion,
-                    x.Conclusion,
-                    x.ExceptionReason,
-                    x.IsOverridden,
-                    x.ReviewComment,
-                    x.ReviewedAt
-                }).ToListAsync(token)
+            ResultCount = summary?.ResultCount ?? 0,
+            GrantedCount = summary?.GrantedCount ?? 0,
+            NotGrantedCount = summary?.NotGrantedCount ?? 0,
+            OverrideCount = summary?.OverrideCount ?? 0,
+            Results = new
+            {
+                Items = items,
+                Total = total,
+                Page = page,
+                PageSize = pageSize
+            }
         });
     }
 
@@ -133,25 +180,30 @@ public sealed class DegreeAwardsController(
             return ConflictProblem("已发布批次不能重新计算。");
 
         var auditCandidates = await db.GraduationAuditResults.AsNoTracking()
-            .Include(x => x.GraduationAuditBatch)
-            .Include(x => x.Student)
-            .ThenInclude(x => x!.AdministrativeClass)
-            .ThenInclude(x => x!.Major)
             .Where(x =>
                 x.GraduationAuditBatch!.GraduationYear == batch.GraduationYear &&
                 x.GraduationAuditBatch.Status == GraduationAuditBatchStatus.Published &&
                 x.Conclusion == GraduationAuditConclusion.Eligible)
             .OrderByDescending(x => x.GraduationAuditBatch!.PublishedAt)
+            .Select(x => new
+            {
+                x.Id,
+                x.StudentId,
+                StudentStatus = x.Student!.Status
+            })
             .ToListAsync(token);
         var audits = auditCandidates
             .GroupBy(x => x.StudentId)
             .Select(x => x.First())
             .ToList();
-        var studentIds = audits.Select(x => x.StudentId).ToArray();
         var gradePoints = await db.GradeRecords.AsNoTracking()
             .Where(x => x.GradeSheet!.Status == GradeSheetStatus.Published &&
                         x.GradePoint.HasValue)
-            .WhereIn(studentIds, x => x.StudentId)
+            .Where(x => db.GraduationAuditResults.Any(audit =>
+                audit.StudentId == x.StudentId &&
+                audit.GraduationAuditBatch!.GraduationYear == batch.GraduationYear &&
+                audit.GraduationAuditBatch.Status == GraduationAuditBatchStatus.Published &&
+                audit.Conclusion == GraduationAuditConclusion.Eligible))
             .Select(x => new
             {
                 x.StudentId,
@@ -159,14 +211,17 @@ public sealed class DegreeAwardsController(
                 x.GradeSheet!.TeachingTask!.Course!.Credits
             }).ToListAsync(token);
 
-        var oldResults = await db.DegreeAwardResults
-            .Where(x => x.DegreeAwardBatchId == id).ToListAsync(token);
-        db.DegreeAwardResults.RemoveRange(oldResults);
-        await db.SaveChangesAsync(token);
+        var gradePointsByStudent = gradePoints
+            .GroupBy(x => x.StudentId)
+            .ToDictionary(group => group.Key, group => group.ToList());
+
+        await db.DegreeAwardResults
+            .Where(x => x.DegreeAwardBatchId == id)
+            .ExecuteDeleteAsync(token);
 
         foreach (var audit in audits)
         {
-            var grades = gradePoints.Where(x => x.StudentId == audit.StudentId).ToList();
+            var grades = gradePointsByStudent.GetValueOrDefault(audit.StudentId) ?? [];
             var credits = grades.Sum(x => x.Credits);
             var average = credits == 0
                 ? 0
@@ -175,8 +230,8 @@ public sealed class DegreeAwardsController(
                     2,
                     MidpointRounding.AwayFromZero);
             var conclusion = DegreeAwardRules.Evaluate(
-                true, audit.Student!.Status, average, batch.MinimumGradePoint);
-            var reason = audit.Student.Status != StudentStatus.Graduated
+                true, audit.StudentStatus, average, batch.MinimumGradePoint);
+            var reason = audit.StudentStatus != StudentStatus.Graduated
                 ? "学籍状态尚未转为毕业"
                 : average < batch.MinimumGradePoint
                     ? $"平均绩点 {average:0.00}，低于批次要求 {batch.MinimumGradePoint:0.00}"