选课批次：时间窗口、退课截止、学分上限、开放/关闭。
教学班投放：容量、班级范围、全校开放。 学生选退课：容量、重复课程、学分上限、课表冲突校验。 教学班实时名单。 校级、学院级、学生角色分级操作。 SQLite 本地增量升级及演示数据。 MySQL 正式 EF Core 迁移。 Vue 已编译进 wwwroot，单服务运行无需 npm run dev。 学生端和管理端均完成桌面、手机响应式检查。
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using System;
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using Microsoft.EntityFrameworkCore.Migrations;
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#nullable disable
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namespace Jiaowu.Api.Infrastructure.Persistence.Migrations.MySql
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{
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/// <inheritdoc />
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public partial class CourseSelection : Migration
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{
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/// <inheritdoc />
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protected override void Up(MigrationBuilder migrationBuilder)
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{
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migrationBuilder.CreateTable(
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name: "CourseSelectionRounds",
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columns: table => new
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{
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Id = table.Column<Guid>(type: "char(36)", nullable: false),
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AcademicTermId = table.Column<Guid>(type: "char(36)", nullable: false),
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Name = table.Column<string>(type: "varchar(120)", maxLength: 120, nullable: false),
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StartsAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
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EndsAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
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WithdrawalEndsAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
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MaxCredits = table.Column<decimal>(type: "decimal(6,1)", precision: 6, scale: 1, nullable: false),
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Status = table.Column<int>(type: "int", nullable: false),
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Notes = table.Column<string>(type: "varchar(500)", maxLength: 500, nullable: true),
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CreatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
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UpdatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false)
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},
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constraints: table =>
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{
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table.PrimaryKey("PK_CourseSelectionRounds", x => x.Id);
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table.ForeignKey(
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name: "FK_CourseSelectionRounds_AcademicTerms_AcademicTermId",
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column: x => x.AcademicTermId,
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principalTable: "AcademicTerms",
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principalColumn: "Id",
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onDelete: ReferentialAction.Restrict);
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})
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.Annotation("MySQL:Charset", "utf8mb4");
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migrationBuilder.CreateTable(
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name: "CourseSelectionOfferings",
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columns: table => new
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{
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Id = table.Column<Guid>(type: "char(36)", nullable: false),
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CourseSelectionRoundId = table.Column<Guid>(type: "char(36)", nullable: false),
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TeachingTaskId = table.Column<Guid>(type: "char(36)", nullable: false),
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Capacity = table.Column<int>(type: "int", nullable: false),
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IsOpenToAll = table.Column<bool>(type: "tinyint(1)", nullable: false),
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Notes = table.Column<string>(type: "varchar(500)", maxLength: 500, nullable: true),
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CreatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
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UpdatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false)
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},
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constraints: table =>
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{
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table.PrimaryKey("PK_CourseSelectionOfferings", x => x.Id);
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table.ForeignKey(
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name: "FK_CourseSelectionOfferings_CourseSelectionRounds_CourseSelecti~",
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column: x => x.CourseSelectionRoundId,
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principalTable: "CourseSelectionRounds",
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principalColumn: "Id",
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onDelete: ReferentialAction.Cascade);
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table.ForeignKey(
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name: "FK_CourseSelectionOfferings_TeachingTasks_TeachingTaskId",
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column: x => x.TeachingTaskId,
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principalTable: "TeachingTasks",
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principalColumn: "Id",
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onDelete: ReferentialAction.Restrict);
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})
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.Annotation("MySQL:Charset", "utf8mb4");
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migrationBuilder.CreateTable(
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name: "CourseEnrollments",
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columns: table => new
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{
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Id = table.Column<Guid>(type: "char(36)", nullable: false),
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CourseSelectionOfferingId = table.Column<Guid>(type: "char(36)", nullable: false),
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StudentId = table.Column<Guid>(type: "char(36)", nullable: false),
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Status = table.Column<int>(type: "int", nullable: false),
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EnrolledAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
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WithdrawnAt = table.Column<DateTime>(type: "datetime(6)", nullable: true),
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CreatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
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UpdatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false)
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},
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constraints: table =>
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{
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table.PrimaryKey("PK_CourseEnrollments", x => x.Id);
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table.ForeignKey(
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name: "FK_CourseEnrollments_CourseSelectionOfferings_CourseSelectionOf~",
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column: x => x.CourseSelectionOfferingId,
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principalTable: "CourseSelectionOfferings",
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principalColumn: "Id",
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onDelete: ReferentialAction.Cascade);
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table.ForeignKey(
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name: "FK_CourseEnrollments_Students_StudentId",
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column: x => x.StudentId,
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principalTable: "Students",
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principalColumn: "Id",
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onDelete: ReferentialAction.Restrict);
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})
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.Annotation("MySQL:Charset", "utf8mb4");
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migrationBuilder.CreateIndex(
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name: "IX_CourseEnrollments_CourseSelectionOfferingId_StudentId",
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table: "CourseEnrollments",
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columns: new[] { "CourseSelectionOfferingId", "StudentId" },
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unique: true);
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migrationBuilder.CreateIndex(
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name: "IX_CourseEnrollments_StudentId_Status",
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table: "CourseEnrollments",
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columns: new[] { "StudentId", "Status" });
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migrationBuilder.CreateIndex(
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name: "IX_CourseSelectionOfferings_CourseSelectionRoundId_TeachingTask~",
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table: "CourseSelectionOfferings",
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columns: new[] { "CourseSelectionRoundId", "TeachingTaskId" },
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unique: true);
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migrationBuilder.CreateIndex(
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name: "IX_CourseSelectionOfferings_TeachingTaskId",
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table: "CourseSelectionOfferings",
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column: "TeachingTaskId");
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migrationBuilder.CreateIndex(
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name: "IX_CourseSelectionRounds_AcademicTermId_Status",
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table: "CourseSelectionRounds",
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columns: new[] { "AcademicTermId", "Status" });
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}
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/// <inheritdoc />
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protected override void Down(MigrationBuilder migrationBuilder)
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{
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migrationBuilder.DropTable(
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name: "CourseEnrollments");
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migrationBuilder.DropTable(
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name: "CourseSelectionOfferings");
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migrationBuilder.DropTable(
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name: "CourseSelectionRounds");
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}
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}
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}
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