assigonmentDto

Entities/Contracts/Assignment.cs

@@ -27,6 +27,10 @@ namespace Entities.Contracts
 		[Column("subject_area")]
 		public SubjectAreaEnum SubjectArea { get; set; }
 
+		[Required]
+		[Column("exam_struct_id")]
+		public Guid ExamStructId { get; set; }
+
 		[Required]
 		[Column("due_date")]
 		public DateTime DueDate { get; set; }
@@ -54,6 +58,8 @@ namespace Entities.Contracts
 		[ForeignKey(nameof(CreatorId))]
 		public User Creator { get; set; }
 		public ICollection<AssignmentClass> AssignmentClasses { get; set; }
+
+		[ForeignKey(nameof(ExamStructId))]
 		public AssignmentQuestion ExamStruct { get; set; }
 		public ICollection<AssignmentAttachment> AssignmentAttachments { get; set; }
 		public ICollection<Submission> Submissions { get; set; }

Entities/Contracts/AssignmentQuestion.cs

@@ -20,10 +20,6 @@ namespace Entities.Contracts
 		[Column("question_id")]
 		public Guid? QuestionId { get; set; }
 
-		[Column("assignment")]
-		[ForeignKey("Assignment")]
-		public Guid? AssignmentId { get; set; }
-
 		[Column("title")]
 		[MaxLength(1024)]
 		public string? Title { get; set; }
@@ -54,7 +50,6 @@ namespace Entities.Contracts
 		public Question? Question { get; set; }
 		public Assignment? Assignment { get; set; }
 
-
 		[ForeignKey(nameof(QuestionContextId))]
 		public QuestionContext? QuestionContext { get; set; }
 

TechHelper.Client/Pages/Exam/ExamEdit.razor

@@ -29,8 +29,8 @@
 			Console.WriteLine($"ExamId 字符串成功解析为 Guid: {parsedExamId}");
 			try
 			{
-				// var result = await ExamService.GetExam(parsedExamId);
+				var result = await ExamService.GetExam(parsedExamId);
-				// if (result.Status) ExamDto = result.Result as ExamDto ?? new ExamDto();
+				if (result.Status) ExamDto = result.Result as AssignmentDto ?? new AssignmentDto();
 			}
 			catch (Exception ex)
 			{

TechHelper.Client/Pages/Exam/ExamManager.razor

@@ -21,7 +21,7 @@ else
 <MudPaper Class="d-flex flex-wrap flex-grow-0 gap-4" Height="100%" Width="100%">
 	@foreach (var item in examDtos)
 	{
-		<ExamPreview examDto="item" Width="256px" Height="256px"> </ExamPreview>
+		<ExamPreview AssignmentDto="item" Width="256px" Height="256px"> </ExamPreview>
 	}
 </MudPaper>
 
@@ -35,7 +35,7 @@ else
 	[CascadingParameter]
 	private Task<AuthenticationState> authenticationStateTask { get; set; }
 
-	private List<ExamDto> examDtos = new List<ExamDto>();
+	private List<AssignmentDto> examDtos = new List<AssignmentDto>();
 
 	private bool isloding = true;
 
@@ -50,7 +50,7 @@ else
 		isloding = true;
 		Snackbar.Add("正在加载", Severity.Info);
 		var result = await ExamService.GetAllExam(authenticationStateTask.Result.User.Identity.Name);
-		examDtos = result.Result as List<ExamDto> ?? new List<ExamDto>();
+		examDtos = result.Result as List<AssignmentDto> ?? new List<AssignmentDto>();
 		isloding = false;
 		Snackbar.Add("加载成功", Severity.Info);
 		StateHasChanged();

TechHelper.Client/Pages/Exam/ExamPreview.razor

@@ -3,7 +3,7 @@
 <MudPaper Class="overflow-hidden " Style="background-color:pink" Width="@Width" Height="@Height" MaxHeight="@MaxHeight" MaxWidth="@MaxWidth">
 	<MudPaper Class="d-flex flex-column flex-grow-1 justify-content-between" Height="100%" Style="background-color:green">
 
-		<MudText Typo="Typo.body2"> @examDto.AssignmentTitle </MudText>
+		<MudText Typo="Typo.body2"> @AssignmentDto.Title </MudText>
 
 
 		<MudPaper>
@@ -26,7 +26,7 @@
 	public NavigationManager navigationManager { get; set; }
 
 	[Parameter]
-	public ExamDto examDto { get; set; }
+	public AssignmentDto AssignmentDto { get; set; }
 
 
 	[Parameter]
@@ -47,11 +47,11 @@
 
 	private void ExamClick()
 	{
-		navigationManager.NavigateTo($"exam/edit/{examDto.AssignmentId}");
+		navigationManager.NavigateTo($"exam/edit/{AssignmentDto.Id}");
 	}
 
 	private void CheckExam()
 	{
-		navigationManager.NavigateTo($"exam/check/{examDto.AssignmentId}");
+		navigationManager.NavigateTo($"exam/check/{AssignmentDto.Id}");
 	}
 }

TechHelper.Client/Services/ExamService.cs

@@ -88,13 +88,12 @@ namespace TechHelper.Client.Services
 
 		public async Task<ApiResponse> GetAllExam(string user)
 		{
-			// 直接使用注入的 _client 实例
 			var response = await _client.GetAsync($"exam/getAllPreview?user={user}");
 
 			if (response.IsSuccessStatusCode)
 			{
 				var content = await response.Content.ReadAsStringAsync();
-				var result = JsonConvert.DeserializeObject<List<ExamDto>>(content);
+				var result = JsonConvert.DeserializeObject<List<AssignmentDto>>(content);
 				return ApiResponse.Success(result: result);
 			}
 			else

TechHelper.Server/Migrations/20250624030547_init.Designer.cs

@@ -12,7 +12,7 @@ using TechHelper.Context;
 namespace TechHelper.Server.Migrations
 {
     [DbContext(typeof(ApplicationContext))]
-    [Migration("20250620104952_init")]
+    [Migration("20250624030547_init")]
     partial class init
     {
         /// <inheritdoc />
@@ -49,6 +49,10 @@ namespace TechHelper.Server.Migrations
                         .HasColumnType("datetime(6)")
                         .HasColumnName("due_date");
 
+                    b.Property<Guid>("ExamStructId")
+                        .HasColumnType("char(36)")
+                        .HasColumnName("exam_struct_id");
+
                     b.Property<bool>("IsDeleted")
                         .HasColumnType("tinyint(1)")
                         .HasColumnName("deleted");
@@ -82,6 +86,9 @@ namespace TechHelper.Server.Migrations
 
                     b.HasIndex("CreatorId");
 
+                    b.HasIndex("ExamStructId")
+                        .IsUnique();
+
                     b.HasIndex("UserId");
 
                     b.ToTable("assignments", (string)null);
@@ -161,10 +168,6 @@ namespace TechHelper.Server.Migrations
                         .HasColumnType("char(36)")
                         .HasColumnName("id");
 
-                    b.Property<Guid?>("AssignmentId")
-                        .HasColumnType("char(36)")
-                        .HasColumnName("assignment");
-
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("datetime(6)")
                         .HasColumnName("created_at");
@@ -206,9 +209,6 @@ namespace TechHelper.Server.Migrations
 
                     b.HasKey("Id");
 
-                    b.HasIndex("AssignmentId")
-                        .IsUnique();
-
                     b.HasIndex("ParentAssignmentQuestionId");
 
                     b.HasIndex("QuestionContextId");
@@ -747,19 +747,19 @@ namespace TechHelper.Server.Migrations
                     b.HasData(
                         new
                         {
-                            Id = new Guid("577dbfe8-7b77-4ead-9386-678f02dea5f4"),
+                            Id = new Guid("6163bf44-8dc7-4ad4-8d4c-c4452123949e"),
                             Name = "Student",
                             NormalizedName = "STUDENT"
                         },
                         new
                         {
-                            Id = new Guid("04b04eed-32b9-4eb0-b5f5-a97bb4626718"),
+                            Id = new Guid("90caaab6-bfc7-4b70-891a-4c6f327e29d8"),
                             Name = "Teacher",
                             NormalizedName = "TEACHER"
                         },
                         new
                         {
-                            Id = new Guid("82354e4d-902d-4dd6-9790-6ef50ba9bc11"),
+                            Id = new Guid("bf88293a-32d6-4d73-bc83-fe763c143024"),
                             Name = "Administrator",
                             NormalizedName = "ADMINISTRATOR"
                         });
@@ -876,11 +876,19 @@ namespace TechHelper.Server.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
+                    b.HasOne("Entities.Contracts.AssignmentQuestion", "ExamStruct")
+                        .WithOne("Assignment")
+                        .HasForeignKey("Entities.Contracts.Assignment", "ExamStructId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
                     b.HasOne("Entities.Contracts.User", null)
                         .WithMany("CreatedAssignments")
                         .HasForeignKey("UserId");
 
                     b.Navigation("Creator");
+
+                    b.Navigation("ExamStruct");
                 });
 
             modelBuilder.Entity("Entities.Contracts.AssignmentAttachment", b =>
@@ -915,10 +923,6 @@ namespace TechHelper.Server.Migrations
 
             modelBuilder.Entity("Entities.Contracts.AssignmentQuestion", b =>
                 {
-                    b.HasOne("Entities.Contracts.Assignment", "Assignment")
-                        .WithOne("ExamStruct")
-                        .HasForeignKey("Entities.Contracts.AssignmentQuestion", "AssignmentId");
-
                     b.HasOne("Entities.Contracts.AssignmentQuestion", "ParentAssignmentQuestion")
                         .WithMany("ChildrenAssignmentQuestion")
                         .HasForeignKey("ParentAssignmentQuestionId");
@@ -933,8 +937,6 @@ namespace TechHelper.Server.Migrations
                         .HasForeignKey("QuestionId")
                         .OnDelete(DeleteBehavior.Cascade);
 
-                    b.Navigation("Assignment");
-
                     b.Navigation("ParentAssignmentQuestion");
 
                     b.Navigation("Question");
@@ -1159,14 +1161,13 @@ namespace TechHelper.Server.Migrations
 
                     b.Navigation("AssignmentClasses");
 
-                    b.Navigation("ExamStruct")
-                        .IsRequired();
-
                     b.Navigation("Submissions");
                 });
 
             modelBuilder.Entity("Entities.Contracts.AssignmentQuestion", b =>
                 {
+                    b.Navigation("Assignment");
+
                     b.Navigation("ChildrenAssignmentQuestion");
 
                     b.Navigation("SubmissionDetails");

TechHelper.Server/Migrations/20250624030547_init.cs

@@ -229,42 +229,6 @@ namespace TechHelper.Server.Migrations
                 })
                 .Annotation("MySql:CharSet", "utf8mb4");
 
-            migrationBuilder.CreateTable(
-                name: "assignments",
-                columns: table => new
-                {
-                    id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
-                    title = table.Column<string>(type: "varchar(255)", maxLength: 255, nullable: false)
-                        .Annotation("MySql:CharSet", "utf8mb4"),
-                    description = table.Column<string>(type: "longtext", nullable: false)
-                        .Annotation("MySql:CharSet", "utf8mb4"),
-                    subject_area = table.Column<byte>(type: "tinyint unsigned", nullable: false),
-                    due_date = table.Column<DateTime>(type: "datetime(6)", nullable: false),
-                    total_points = table.Column<byte>(type: "tinyint unsigned", nullable: false),
-                    score = table.Column<float>(type: "float", nullable: false),
-                    created_by = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
-                    created_at = table.Column<DateTime>(type: "datetime(6)", nullable: false),
-                    updated_at = table.Column<DateTime>(type: "datetime(6)", nullable: false),
-                    deleted = table.Column<bool>(type: "tinyint(1)", nullable: false),
-                    UserId = table.Column<Guid>(type: "char(36)", nullable: true, collation: "ascii_general_ci")
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_assignments", x => x.id);
-                    table.ForeignKey(
-                        name: "FK_assignments_AspNetUsers_UserId",
-                        column: x => x.UserId,
-                        principalTable: "AspNetUsers",
-                        principalColumn: "Id");
-                    table.ForeignKey(
-                        name: "FK_assignments_AspNetUsers_created_by",
-                        column: x => x.created_by,
-                        principalTable: "AspNetUsers",
-                        principalColumn: "Id",
-                        onDelete: ReferentialAction.Cascade);
-                })
-                .Annotation("MySql:CharSet", "utf8mb4");
-
             migrationBuilder.CreateTable(
                 name: "classes",
                 columns: table => new
@@ -316,99 +280,6 @@ namespace TechHelper.Server.Migrations
                 })
                 .Annotation("MySql:CharSet", "utf8mb4");
 
-            migrationBuilder.CreateTable(
-                name: "assignment_attachments",
-                columns: table => new
-                {
-                    id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
-                    assignment_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
-                    file_path = table.Column<string>(type: "varchar(255)", maxLength: 255, nullable: false)
-                        .Annotation("MySql:CharSet", "utf8mb4"),
-                    file_name = table.Column<string>(type: "varchar(255)", maxLength: 255, nullable: false)
-                        .Annotation("MySql:CharSet", "utf8mb4"),
-                    uploaded_at = table.Column<DateTime>(type: "datetime(6)", nullable: false),
-                    deleted = table.Column<bool>(type: "tinyint(1)", nullable: false)
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_assignment_attachments", x => x.id);
-                    table.ForeignKey(
-                        name: "FK_assignment_attachments_assignments_assignment_id",
-                        column: x => x.assignment_id,
-                        principalTable: "assignments",
-                        principalColumn: "id",
-                        onDelete: ReferentialAction.Cascade);
-                })
-                .Annotation("MySql:CharSet", "utf8mb4");
-
-            migrationBuilder.CreateTable(
-                name: "submissions",
-                columns: table => new
-                {
-                    id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
-                    assignment_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
-                    student_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
-                    attempt_number = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
-                    submission_time = table.Column<DateTime>(type: "datetime(6)", nullable: false),
-                    overall_grade = table.Column<float>(type: "float", precision: 5, scale: 2, nullable: true),
-                    overall_feedback = table.Column<string>(type: "longtext", nullable: false)
-                        .Annotation("MySql:CharSet", "utf8mb4"),
-                    graded_by = table.Column<Guid>(type: "char(36)", nullable: true, collation: "ascii_general_ci"),
-                    graded_at = table.Column<DateTime>(type: "datetime(6)", nullable: true),
-                    deleted = table.Column<bool>(type: "tinyint(1)", nullable: false, defaultValue: false),
-                    status = table.Column<int>(type: "int", maxLength: 15, nullable: false)
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_submissions", x => x.id);
-                    table.ForeignKey(
-                        name: "FK_submissions_AspNetUsers_graded_by",
-                        column: x => x.graded_by,
-                        principalTable: "AspNetUsers",
-                        principalColumn: "Id",
-                        onDelete: ReferentialAction.SetNull);
-                    table.ForeignKey(
-                        name: "FK_submissions_AspNetUsers_student_id",
-                        column: x => x.student_id,
-                        principalTable: "AspNetUsers",
-                        principalColumn: "Id",
-                        onDelete: ReferentialAction.Restrict);
-                    table.ForeignKey(
-                        name: "FK_submissions_assignments_assignment_id",
-                        column: x => x.assignment_id,
-                        principalTable: "assignments",
-                        principalColumn: "id",
-                        onDelete: ReferentialAction.Cascade);
-                })
-                .Annotation("MySql:CharSet", "utf8mb4");
-
-            migrationBuilder.CreateTable(
-                name: "assignment_class",
-                columns: table => new
-                {
-                    assignment_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
-                    class_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
-                    assigned_at = table.Column<DateTime>(type: "datetime(6)", nullable: false),
-                    deleted = table.Column<bool>(type: "tinyint(1)", nullable: false, defaultValue: false)
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_assignment_class", x => new { x.assignment_id, x.class_id });
-                    table.ForeignKey(
-                        name: "FK_assignment_class_assignments_assignment_id",
-                        column: x => x.assignment_id,
-                        principalTable: "assignments",
-                        principalColumn: "id",
-                        onDelete: ReferentialAction.Cascade);
-                    table.ForeignKey(
-                        name: "FK_assignment_class_classes_class_id",
-                        column: x => x.class_id,
-                        principalTable: "classes",
-                        principalColumn: "id",
-                        onDelete: ReferentialAction.Cascade);
-                })
-                .Annotation("MySql:CharSet", "utf8mb4");
-
             migrationBuilder.CreateTable(
                 name: "class_student",
                 columns: table => new
@@ -556,7 +427,6 @@ namespace TechHelper.Server.Migrations
                 {
                     id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
                     question_id = table.Column<Guid>(type: "char(36)", nullable: true, collation: "ascii_general_ci"),
-                    assignment = table.Column<Guid>(type: "char(36)", nullable: true, collation: "ascii_general_ci"),
                     title = table.Column<string>(type: "varchar(1024)", maxLength: 1024, nullable: true)
                         .Annotation("MySql:CharSet", "utf8mb4"),
                     description = table.Column<Guid>(type: "char(36)", nullable: true, collation: "ascii_general_ci"),
@@ -581,11 +451,6 @@ namespace TechHelper.Server.Migrations
                         column: x => x.parent_question_group_id,
                         principalTable: "assignment_questions",
                         principalColumn: "id");
-                    table.ForeignKey(
-                        name: "FK_assignment_questions_assignments_assignment",
-                        column: x => x.assignment,
-                        principalTable: "assignments",
-                        principalColumn: "id");
                     table.ForeignKey(
                         name: "FK_assignment_questions_questions_question_id",
                         column: x => x.question_id,
@@ -595,6 +460,142 @@ namespace TechHelper.Server.Migrations
                 })
                 .Annotation("MySql:CharSet", "utf8mb4");
 
+            migrationBuilder.CreateTable(
+                name: "assignments",
+                columns: table => new
+                {
+                    id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    title = table.Column<string>(type: "varchar(255)", maxLength: 255, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    description = table.Column<string>(type: "longtext", nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    subject_area = table.Column<byte>(type: "tinyint unsigned", nullable: false),
+                    exam_struct_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    due_date = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    total_points = table.Column<byte>(type: "tinyint unsigned", nullable: false),
+                    score = table.Column<float>(type: "float", nullable: false),
+                    created_by = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    created_at = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    updated_at = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    deleted = table.Column<bool>(type: "tinyint(1)", nullable: false),
+                    UserId = table.Column<Guid>(type: "char(36)", nullable: true, collation: "ascii_general_ci")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_assignments", x => x.id);
+                    table.ForeignKey(
+                        name: "FK_assignments_AspNetUsers_UserId",
+                        column: x => x.UserId,
+                        principalTable: "AspNetUsers",
+                        principalColumn: "Id");
+                    table.ForeignKey(
+                        name: "FK_assignments_AspNetUsers_created_by",
+                        column: x => x.created_by,
+                        principalTable: "AspNetUsers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_assignments_assignment_questions_exam_struct_id",
+                        column: x => x.exam_struct_id,
+                        principalTable: "assignment_questions",
+                        principalColumn: "id",
+                        onDelete: ReferentialAction.Cascade);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "assignment_attachments",
+                columns: table => new
+                {
+                    id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    assignment_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    file_path = table.Column<string>(type: "varchar(255)", maxLength: 255, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    file_name = table.Column<string>(type: "varchar(255)", maxLength: 255, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    uploaded_at = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    deleted = table.Column<bool>(type: "tinyint(1)", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_assignment_attachments", x => x.id);
+                    table.ForeignKey(
+                        name: "FK_assignment_attachments_assignments_assignment_id",
+                        column: x => x.assignment_id,
+                        principalTable: "assignments",
+                        principalColumn: "id",
+                        onDelete: ReferentialAction.Cascade);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "assignment_class",
+                columns: table => new
+                {
+                    assignment_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    class_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    assigned_at = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    deleted = table.Column<bool>(type: "tinyint(1)", nullable: false, defaultValue: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_assignment_class", x => new { x.assignment_id, x.class_id });
+                    table.ForeignKey(
+                        name: "FK_assignment_class_assignments_assignment_id",
+                        column: x => x.assignment_id,
+                        principalTable: "assignments",
+                        principalColumn: "id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_assignment_class_classes_class_id",
+                        column: x => x.class_id,
+                        principalTable: "classes",
+                        principalColumn: "id",
+                        onDelete: ReferentialAction.Cascade);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "submissions",
+                columns: table => new
+                {
+                    id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    assignment_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    student_id = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    attempt_number = table.Column<Guid>(type: "char(36)", nullable: false, collation: "ascii_general_ci"),
+                    submission_time = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    overall_grade = table.Column<float>(type: "float", precision: 5, scale: 2, nullable: true),
+                    overall_feedback = table.Column<string>(type: "longtext", nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    graded_by = table.Column<Guid>(type: "char(36)", nullable: true, collation: "ascii_general_ci"),
+                    graded_at = table.Column<DateTime>(type: "datetime(6)", nullable: true),
+                    deleted = table.Column<bool>(type: "tinyint(1)", nullable: false, defaultValue: false),
+                    status = table.Column<int>(type: "int", maxLength: 15, nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_submissions", x => x.id);
+                    table.ForeignKey(
+                        name: "FK_submissions_AspNetUsers_graded_by",
+                        column: x => x.graded_by,
+                        principalTable: "AspNetUsers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.SetNull);
+                    table.ForeignKey(
+                        name: "FK_submissions_AspNetUsers_student_id",
+                        column: x => x.student_id,
+                        principalTable: "AspNetUsers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_submissions_assignments_assignment_id",
+                        column: x => x.assignment_id,
+                        principalTable: "assignments",
+                        principalColumn: "id",
+                        onDelete: ReferentialAction.Cascade);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
             migrationBuilder.CreateTable(
                 name: "submission_details",
                 columns: table => new
@@ -643,9 +644,9 @@ namespace TechHelper.Server.Migrations
                 columns: new[] { "Id", "ConcurrencyStamp", "Name", "NormalizedName" },
                 values: new object[,]
                 {
-                    { new Guid("04b04eed-32b9-4eb0-b5f5-a97bb4626718"), null, "Teacher", "TEACHER" },
+                    { new Guid("6163bf44-8dc7-4ad4-8d4c-c4452123949e"), null, "Student", "STUDENT" },
-                    { new Guid("577dbfe8-7b77-4ead-9386-678f02dea5f4"), null, "Student", "STUDENT" },
+                    { new Guid("90caaab6-bfc7-4b70-891a-4c6f327e29d8"), null, "Teacher", "TEACHER" },
-                    { new Guid("82354e4d-902d-4dd6-9790-6ef50ba9bc11"), null, "Administrator", "ADMINISTRATOR" }
+                    { new Guid("bf88293a-32d6-4d73-bc83-fe763c143024"), null, "Administrator", "ADMINISTRATOR" }
                 });
 
             migrationBuilder.CreateIndex(
@@ -695,12 +696,6 @@ namespace TechHelper.Server.Migrations
                 table: "assignment_class",
                 column: "class_id");
 
-            migrationBuilder.CreateIndex(
-                name: "IX_assignment_questions_assignment",
-                table: "assignment_questions",
-                column: "assignment",
-                unique: true);
-
             migrationBuilder.CreateIndex(
                 name: "IX_assignment_questions_description",
                 table: "assignment_questions",
@@ -721,6 +716,12 @@ namespace TechHelper.Server.Migrations
                 table: "assignments",
                 column: "created_by");
 
+            migrationBuilder.CreateIndex(
+                name: "IX_assignments_exam_struct_id",
+                table: "assignments",
+                column: "exam_struct_id",
+                unique: true);
+
             migrationBuilder.CreateIndex(
                 name: "IX_assignments_UserId",
                 table: "assignments",
@@ -851,10 +852,13 @@ namespace TechHelper.Server.Migrations
                 name: "classes");
 
             migrationBuilder.DropTable(
-                name: "assignment_questions");
+                name: "submissions");
 
             migrationBuilder.DropTable(
-                name: "submissions");
+                name: "assignments");
+
+            migrationBuilder.DropTable(
+                name: "assignment_questions");
 
             migrationBuilder.DropTable(
                 name: "QuestionContexts");
@@ -863,14 +867,11 @@ namespace TechHelper.Server.Migrations
                 name: "questions");
 
             migrationBuilder.DropTable(
-                name: "assignments");
+                name: "AspNetUsers");
 
             migrationBuilder.DropTable(
                 name: "key_point");
 
-            migrationBuilder.DropTable(
-                name: "AspNetUsers");
-
             migrationBuilder.DropTable(
                 name: "lesson");
 

TechHelper.Server/Migrations/ApplicationContextModelSnapshot.cs

@@ -46,6 +46,10 @@ namespace TechHelper.Server.Migrations
                         .HasColumnType("datetime(6)")
                         .HasColumnName("due_date");
 
+                    b.Property<Guid>("ExamStructId")
+                        .HasColumnType("char(36)")
+                        .HasColumnName("exam_struct_id");
+
                     b.Property<bool>("IsDeleted")
                         .HasColumnType("tinyint(1)")
                         .HasColumnName("deleted");
@@ -79,6 +83,9 @@ namespace TechHelper.Server.Migrations
 
                     b.HasIndex("CreatorId");
 
+                    b.HasIndex("ExamStructId")
+                        .IsUnique();
+
                     b.HasIndex("UserId");
 
                     b.ToTable("assignments", (string)null);
@@ -158,10 +165,6 @@ namespace TechHelper.Server.Migrations
                         .HasColumnType("char(36)")
                         .HasColumnName("id");
 
-                    b.Property<Guid?>("AssignmentId")
-                        .HasColumnType("char(36)")
-                        .HasColumnName("assignment");
-
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("datetime(6)")
                         .HasColumnName("created_at");
@@ -203,9 +206,6 @@ namespace TechHelper.Server.Migrations
 
                     b.HasKey("Id");
 
-                    b.HasIndex("AssignmentId")
-                        .IsUnique();
-
                     b.HasIndex("ParentAssignmentQuestionId");
 
                     b.HasIndex("QuestionContextId");
@@ -744,19 +744,19 @@ namespace TechHelper.Server.Migrations
                     b.HasData(
                         new
                         {
-                            Id = new Guid("577dbfe8-7b77-4ead-9386-678f02dea5f4"),
+                            Id = new Guid("6163bf44-8dc7-4ad4-8d4c-c4452123949e"),
                             Name = "Student",
                             NormalizedName = "STUDENT"
                         },
                         new
                         {
-                            Id = new Guid("04b04eed-32b9-4eb0-b5f5-a97bb4626718"),
+                            Id = new Guid("90caaab6-bfc7-4b70-891a-4c6f327e29d8"),
                             Name = "Teacher",
                             NormalizedName = "TEACHER"
                         },
                         new
                         {
-                            Id = new Guid("82354e4d-902d-4dd6-9790-6ef50ba9bc11"),
+                            Id = new Guid("bf88293a-32d6-4d73-bc83-fe763c143024"),
                             Name = "Administrator",
                             NormalizedName = "ADMINISTRATOR"
                         });
@@ -873,11 +873,19 @@ namespace TechHelper.Server.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
+                    b.HasOne("Entities.Contracts.AssignmentQuestion", "ExamStruct")
+                        .WithOne("Assignment")
+                        .HasForeignKey("Entities.Contracts.Assignment", "ExamStructId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
                     b.HasOne("Entities.Contracts.User", null)
                         .WithMany("CreatedAssignments")
                         .HasForeignKey("UserId");
 
                     b.Navigation("Creator");
+
+                    b.Navigation("ExamStruct");
                 });
 
             modelBuilder.Entity("Entities.Contracts.AssignmentAttachment", b =>
@@ -912,10 +920,6 @@ namespace TechHelper.Server.Migrations
 
             modelBuilder.Entity("Entities.Contracts.AssignmentQuestion", b =>
                 {
-                    b.HasOne("Entities.Contracts.Assignment", "Assignment")
-                        .WithOne("ExamStruct")
-                        .HasForeignKey("Entities.Contracts.AssignmentQuestion", "AssignmentId");
-
                     b.HasOne("Entities.Contracts.AssignmentQuestion", "ParentAssignmentQuestion")
                         .WithMany("ChildrenAssignmentQuestion")
                         .HasForeignKey("ParentAssignmentQuestionId");
@@ -930,8 +934,6 @@ namespace TechHelper.Server.Migrations
                         .HasForeignKey("QuestionId")
                         .OnDelete(DeleteBehavior.Cascade);
 
-                    b.Navigation("Assignment");
-
                     b.Navigation("ParentAssignmentQuestion");
 
                     b.Navigation("Question");
@@ -1156,14 +1158,13 @@ namespace TechHelper.Server.Migrations
 
                     b.Navigation("AssignmentClasses");
 
-                    b.Navigation("ExamStruct")
-                        .IsRequired();
-
                     b.Navigation("Submissions");
                 });
 
             modelBuilder.Entity("Entities.Contracts.AssignmentQuestion", b =>
                 {
+                    b.Navigation("Assignment");
+
                     b.Navigation("ChildrenAssignmentQuestion");
 
                     b.Navigation("SubmissionDetails");

TechHelper.Server/Repositories/ExamRepository.cs

@@ -11,6 +11,7 @@ namespace TechHelper.Server.Repositories
 		private readonly IUnitOfWork _unitOfWork;
 		private readonly IRepository<Assignment> _assignmentRepo;
 		private readonly IRepository<Question> _questionRepo;
+		private readonly IRepository<AssignmentQuestion> _assignQuestionRepo;
 
 		public ExamRepository(IUnitOfWork unitOfWork)
 		{
@@ -20,11 +21,50 @@ namespace TechHelper.Server.Repositories
 
 		public async Task<Assignment?> GetFullExamByIdAsync(Guid assignmentId)
 		{
+			var result = await _assignmentRepo.GetFirstOrDefaultAsync(
+				predicate:
+					a => a.Id == assignmentId,
+				include:
+					i => i.Include(a => a.ExamStruct)
+				);
 
-			return null;
+			result.ExamStruct = await GetNeed(result.ExamStructId)?? null;
+
+			return result;
 		}
 
 
+		public async Task<AssignmentQuestion?> GetNeed(Guid id) 
+		{
+			var result = await _assignQuestionRepo.GetFirstOrDefaultAsync(
+				predicate: aq => aq.Id == id,
+				include: i => i
+					.Include(aq => aq.ChildrenAssignmentQuestion) 
+					.Include(aq => aq.Question)
+						.ThenInclude(q => q.Lesson)
+					.Include(aq => aq.Question)
+						.ThenInclude(q => q.KeyPoint)
+			);
+
+			if (result == null)
+			{
+				return null;
+			}
+
+			var loadedChildren = new List<AssignmentQuestion>();
+			foreach (var child in result.ChildrenAssignmentQuestion)
+			{
+				var loadedChild = await GetNeed(child.Id); 
+				if (loadedChild != null)
+				{
+					loadedChildren.Add(loadedChild);
+				}
+			}
+			result.ChildrenAssignmentQuestion = loadedChildren; 
+
+			return result;
+		}
+
 
 
 		public async Task<IEnumerable<Assignment>> GetExamPreviewsByUserAsync(Guid userId)

TechHelper.Server/Services/ExamService.cs

@@ -75,10 +75,11 @@ namespace TechHelper.Server.Services
 			return _mapper.Map<AssignmentDto>(assignment);
 		}
 
-		public async Task<IEnumerable<AssignmentDto>> GetAllExamPreviewsAsync(Guid userId)
+		public async Task<ApiResponse> GetAllExamPreviewsAsync(Guid userId)
 		{
 			var assignments = await _examRepository.GetExamPreviewsByUserAsync(userId);
-			return _mapper.Map<IEnumerable<AssignmentDto>>(assignments);
+			var result =  _mapper.Map<List<AssignmentDto>>(assignments);
+			return ApiResponse.Success(result: result);
 		}
 
 
@@ -87,9 +88,15 @@ namespace TechHelper.Server.Services
 			throw new NotImplementedException();
 		}
 
-		public Task<ApiResponse> GetAsync(Guid id)
+		public async Task<ApiResponse> GetAsync(Guid id)
 		{
-			throw new NotImplementedException();
+			var assignment = await _examRepository.GetFullExamByIdAsync(id);
+			if (assignment == null)
+			{
+				return ApiResponse.Error("获取失败");
+			}
+			var result = _mapper.Map<AssignmentDto>(assignment);
+			return ApiResponse.Success(result: result);
 		}
 
 		public Task<ApiResponse> AddAsync(AssignmentDto model)
@@ -107,10 +114,6 @@ namespace TechHelper.Server.Services
 			throw new NotImplementedException();
 		}
 
-		Task<ApiResponse> IExamService.GetAllExamPreviewsAsync(Guid userId)
-		{
-			throw new NotImplementedException();
-		}
 	}
 
 }