自选项目实验优化

src/Jiaowu.Api/Infrastructure/Persistence/Migrations/MySql/20260811011348_AddSelfScheduledExperimentSelectionWindowsAndInstructors.cs

@@ -0,0 +1,81 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Jiaowu.Api.Infrastructure.Persistence.Migrations.MySql
+{
+    /// <inheritdoc />
+    public partial class AddSelfScheduledExperimentSelectionWindowsAndInstructors : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<DateTime>(
+                name: "SelectionEndsAt",
+                table: "ExperimentProjects",
+                type: "datetime(6)",
+                nullable: true);
+
+            migrationBuilder.AddColumn<DateTime>(
+                name: "SelectionStartsAt",
+                table: "ExperimentProjects",
+                type: "datetime(6)",
+                nullable: true);
+
+            migrationBuilder.CreateTable(
+                name: "ExperimentSessionInstructors",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "char(36)", nullable: false),
+                    ExperimentSessionId = table.Column<Guid>(type: "char(36)", nullable: false),
+                    TeacherId = table.Column<Guid>(type: "char(36)", nullable: false),
+                    CreatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    UpdatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ExperimentSessionInstructors", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_ExperimentSessionInstructors_ExperimentSessions_ExperimentSe~",
+                        column: x => x.ExperimentSessionId,
+                        principalTable: "ExperimentSessions",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_ExperimentSessionInstructors_Teachers_TeacherId",
+                        column: x => x.TeacherId,
+                        principalTable: "Teachers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                })
+                .Annotation("MySQL:Charset", "utf8mb4");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ExperimentSessionInstructors_ExperimentSessionId_TeacherId",
+                table: "ExperimentSessionInstructors",
+                columns: new[] { "ExperimentSessionId", "TeacherId" },
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ExperimentSessionInstructors_TeacherId",
+                table: "ExperimentSessionInstructors",
+                column: "TeacherId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "ExperimentSessionInstructors");
+
+            migrationBuilder.DropColumn(
+                name: "SelectionEndsAt",
+                table: "ExperimentProjects");
+
+            migrationBuilder.DropColumn(
+                name: "SelectionStartsAt",
+                table: "ExperimentProjects");
+        }
+    }
+}

src/Jiaowu.Api/Infrastructure/Persistence/Migrations/MySql/AppDbContextModelSnapshot.cs

@@ -2520,6 +2520,12 @@ namespace Jiaowu.Api.Infrastructure.Persistence.Migrations.MySql
                     b.Property<int?>("ScheduleWeek")
                         .HasColumnType("int");
 
+                    b.Property<DateTime?>("SelectionEndsAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<DateTime?>("SelectionStartsAt")
+                        .HasColumnType("datetime(6)");
+
                     b.Property<DateTime>("StartDate")
                         .HasColumnType("date");
 
@@ -2596,6 +2602,34 @@ namespace Jiaowu.Api.Infrastructure.Persistence.Migrations.MySql
                     b.ToTable("ExperimentSessions");
                 });
 
+            modelBuilder.Entity("Jiaowu.Api.Domain.Academic.ExperimentSessionInstructor", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("char(36)");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<Guid>("ExperimentSessionId")
+                        .HasColumnType("char(36)");
+
+                    b.Property<Guid>("TeacherId")
+                        .HasColumnType("char(36)");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("TeacherId");
+
+                    b.HasIndex("ExperimentSessionId", "TeacherId")
+                        .IsUnique();
+
+                    b.ToTable("ExperimentSessionInstructors");
+                });
+
             modelBuilder.Entity("Jiaowu.Api.Domain.Academic.GradeItem", b =>
                 {
                     b.Property<Guid>("Id")
@@ -5970,6 +6004,25 @@ namespace Jiaowu.Api.Infrastructure.Persistence.Migrations.MySql
                     b.Navigation("ExperimentProject");
                 });
 
+            modelBuilder.Entity("Jiaowu.Api.Domain.Academic.ExperimentSessionInstructor", b =>
+                {
+                    b.HasOne("Jiaowu.Api.Domain.Academic.ExperimentSession", "ExperimentSession")
+                        .WithMany("Instructors")
+                        .HasForeignKey("ExperimentSessionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Jiaowu.Api.Domain.Academic.Teacher", "Teacher")
+                        .WithMany()
+                        .HasForeignKey("TeacherId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("ExperimentSession");
+
+                    b.Navigation("Teacher");
+                });
+
             modelBuilder.Entity("Jiaowu.Api.Domain.Academic.GradeItem", b =>
                 {
                     b.HasOne("Jiaowu.Api.Domain.Academic.GradeSheet", "GradeSheet")
@@ -6843,6 +6896,8 @@ namespace Jiaowu.Api.Infrastructure.Persistence.Migrations.MySql
             modelBuilder.Entity("Jiaowu.Api.Domain.Academic.ExperimentSession", b =>
                 {
                     b.Navigation("Bookings");
+
+                    b.Navigation("Instructors");
                 });
 
             modelBuilder.Entity("Jiaowu.Api.Domain.Academic.GradeItem", b =>