feat: 多班级版 v2.0 - Go后端重写 + 43轮代码审查

- 后端从 Python FastAPI 重写为 Go Gin（端口 56789） - 多班级完全隔离 - 超级管理员独立登录 - 课代表作业管理、排行榜分项排行 - 角色加减分上下限可配置 - 家长改密功能（可开关） - 周度/月度重置功能 - MySQL 5.7 兼容 - 43轮代码审查+全部修复 - Apache 2.0 许可证
2026-06-22 10:06:10 +08:00
parent 4084afc53c
commit d6dec878bd
214 changed files with 12622 additions and 9725 deletions
--- a/backend-go/internal/repository/student_repo.go
+++ b/backend-go/internal/repository/student_repo.go
@@ -0,0 +1,230 @@
+// ===========================================
+// 多班级版班级管理系统 - Go 后端
+//
+// 开发者: Canglan
+// 联系方式: admin@sea-studio.top
+// 版权归属: Sea Network Technology Studio
+// 许可证: Apache License 2.0
+//
+// 版权所有 © Sea Network Technology Studio
+// ===========================================
+
+package repository
+
+import (
+	"fmt"
+	"strings"
+
+	"gorm.io/gorm"
+
+	"hz-gitea.sea-studio.top/canglan/SharedClassManager/internal/model"
+)
+
+// StudentRepo 学生数据访问层
+type StudentRepo struct {
+	db *gorm.DB
+}
+
+// NewStudentRepo 创建学生 Repository
+func NewStudentRepo(db *gorm.DB) *StudentRepo {
+	return &StudentRepo{db: db}
+}
+
+// GetByID 根据ID获取学生信息（含班级名称）
+func (r *StudentRepo) GetByID(studentID int) (*model.Student, error) {
+	var student model.Student
+	if err := r.db.Table("students s").
+		Select("s.*, c.class_name").
+		Joins("LEFT JOIN classes c ON s.class_id = c.class_id").
+		Where("s.student_id = ?", studentID).
+		First(&student).Error; err != nil {
+		return nil, err
+	}
+	return &student, nil
+}
+
+// GetByStudentNo 根据学号获取学生（可指定班级）
+func (r *StudentRepo) GetByStudentNo(studentNo string, classID int) (*model.Student, error) {
+	var student model.Student
+	query := r.db.Where("student_no = ?", studentNo)
+	if classID > 0 {
+		query = query.Where("class_id = ?", classID)
+	}
+	if err := query.First(&student).Error; err != nil {
+		return nil, err
+	}
+	return &student, nil
+}
+
+// GetAll 获取指定班级的学生列表
+func (r *StudentRepo) GetAll(classID int, includeDisabled bool) ([]model.Student, error) {
+	var students []model.Student
+	query := r.db.Where("class_id = ?", classID)
+	if !includeDisabled {
+		query = query.Where("status = 1")
+	}
+	if err := query.Order("student_no").Find(&students).Error; err != nil {
+		return nil, err
+	}
+	return students, nil
+}
+
+// GetDormitoryList 获取班级内所有不重复的宿舍号列表
+func (r *StudentRepo) GetDormitoryList(classID int) ([]string, error) {
+	var dormitories []string
+	err := r.db.Model(&model.Student{}).
+		Where("class_id = ? AND status = 1 AND dormitory_number IS NOT NULL AND dormitory_number != ''", classID).
+		Distinct("dormitory_number").
+		Order("dormitory_number").
+		Pluck("dormitory_number", &dormitories).Error
+	if err != nil {
+		return nil, err
+	}
+	return dormitories, nil
+}
+
+// Create 创建学生记录
+func (r *StudentRepo) Create(student *model.Student) (int, error) {
+	if err := r.db.Create(student).Error; err != nil {
+		return 0, err
+	}
+	return student.StudentID, nil
+}
+
+// Update 更新学生信息（仅更新非零值字段）
+func (r *StudentRepo) Update(studentID int, updates map[string]interface{}) error {
+	if len(updates) == 0 {
+		return nil
+	}
+	return r.db.Model(&model.Student{}).
+		Where("student_id = ?", studentID).
+		Updates(updates).Error
+}
+
+// SoftDelete 软删除学生
+func (r *StudentRepo) SoftDelete(studentID int) error {
+	return r.db.Model(&model.Student{}).
+		Where("student_id = ?", studentID).
+		Update("status", 0).Error
+}
+
+// UpdateTotalPoints 更新学生总分（增量更新，下限保护为 0）
+func (r *StudentRepo) UpdateTotalPoints(studentID int, pointsChange int) error {
+	return r.db.Model(&model.Student{}).
+		Where("student_id = ?", studentID).
+		Update("total_points", gorm.Expr("GREATEST(total_points + ?, 0)", pointsChange)).Error
+}
+
+// GetRanking 获取班级内学生排行
+func (r *StudentRepo) GetRanking(classID int, limit int) ([]model.Student, error) {
+	var students []model.Student
+	if err := r.db.Where("status = 1 AND class_id = ?", classID).
+		Order("total_points DESC, student_id ASC").
+		Limit(limit).
+		Find(&students).Error; err != nil {
+		return nil, err
+	}
+	return students, nil
+}
+
+// GetTotalCount 获取班级内活跃学生总数
+func (r *StudentRepo) GetTotalCount(classID int) (int64, error) {
+	var count int64
+	if err := r.db.Model(&model.Student{}).
+		Where("status = 1 AND class_id = ?", classID).
+		Count(&count).Error; err != nil {
+		return 0, err
+	}
+	return count, nil
+}
+
+// ListByClass 分页获取班级学生列表（支持搜索和宿舍号过滤）
+func (r *StudentRepo) ListByClass(classID int, page, pageSize int, search, dormitoryNumber string) ([]model.Student, int64, error) {
+	var students []model.Student
+	var total int64
+
+	query := r.db.Model(&model.Student{}).Where("status = 1 AND class_id = ?", classID)
+
+	if search != "" {
+		escaped := strings.NewReplacer("\\", "\\\\", "%", "\\%", "_", "\\_").Replace(search)
+		searchPattern := fmt.Sprintf("%%%s%%", escaped)
+		query = query.Where("student_no LIKE ? OR name LIKE ?", searchPattern, searchPattern)
+	}
+
+	if dormitoryNumber != "" {
+		query = query.Where("dormitory_number = ?", dormitoryNumber)
+	}
+
+	// 获取总数
+	if err := query.Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	// 分页查询
+	offset := (page - 1) * pageSize
+	if err := query.Order("student_no").
+		Limit(pageSize).
+		Offset(offset).
+		Find(&students).Error; err != nil {
+		return nil, 0, err
+	}
+
+	return students, total, nil
+}
+
+// BatchCreate 批量创建学生
+func (r *StudentRepo) BatchCreate(students []model.Student) error {
+	return r.db.Create(&students).Error
+}
+
+// GetStudentNosByClass 获取指定班级所有学生学号（用于批量导入去重）
+func (r *StudentRepo) GetStudentNosByClass(classID int) ([]string, error) {
+	var studentNos []string
+	if err := r.db.Model(&model.Student{}).
+		Where("class_id = ?", classID).
+		Pluck("student_no", &studentNos).Error; err != nil {
+		return nil, err
+	}
+	return studentNos, nil
+}
+
+// ResetPoints 重置班级内所有学生的操行分为初始值
+func (r *StudentRepo) ResetPoints(classID int, initialPoints int) error {
+	return r.db.Model(&model.Student{}).
+		Where("class_id = ? AND status = 1", classID).
+		Update("total_points", initialPoints).Error
+}
+
+// GetByParentAccount 根据家长账号查找学生
+func (r *StudentRepo) GetByParentAccount(parentAccount string) (*model.Student, error) {
+	var student model.Student
+	if err := r.db.Where("parent_account = ? AND status = 1", parentAccount).First(&student).Error; err != nil {
+		return nil, err
+	}
+	return &student, nil
+}
+
+// GetRankByStudentID 使用密集排名（dense rank）计算学生排名：相同分数同名次，后续名次不跳过
+func (r *StudentRepo) GetRankByStudentID(classID, studentID int) (int, error) {
+	var student model.Student
+	if err := r.db.Select("total_points").Where("student_id = ?", studentID).First(&student).Error; err != nil {
+		return 0, err
+	}
+	var distinctHigherCount int64
+	if err := r.db.Raw("SELECT COUNT(DISTINCT total_points) FROM students WHERE status = 1 AND class_id = ? AND total_points > ?",
+		classID, student.TotalPoints).Scan(&distinctHigherCount).Error; err != nil {
+		return 0, err
+	}
+	return int(distinctHigherCount) + 1, nil
+}
+
+// GetStudentsByClassID 获取班级内所有活跃学生（用于归档等批量操作）
+func (r *StudentRepo) GetStudentsByClassID(classID int) ([]model.Student, error) {
+	var students []model.Student
+	if err := r.db.Where("class_id = ? AND status = 1", classID).
+		Order("total_points DESC, student_id ASC").
+		Find(&students).Error; err != nil {
+		return nil, err
+	}
+	return students, nil
+}