项目初始化

dao/user_dao.go

@@ -0,0 +1,69 @@
+package dao
+
+import (
+	"RelationshipManagement-backend/model"
+	"gorm.io/gorm"
+)
+
+// UserDAO 用户数据访问对象
+type UserDAO struct {
+	db *gorm.DB
+}
+
+// NewUserDAO 创建用户DAO实例
+func NewUserDAO(db *gorm.DB) *UserDAO {
+	return &UserDAO{db: db}
+}
+
+// Create 创建用户
+func (dao *UserDAO) Create(user *model.User) error {
+	return dao.db.Create(user).Error
+}
+
+// GetByID 根据ID获取用户
+func (dao *UserDAO) GetByID(id uint) (*model.User, error) {
+	var user model.User
+	err := dao.db.First(&user, id).Error
+	if err != nil {
+		return nil, err
+	}
+	return &user, nil
+}
+
+// GetByUsername 根据用户名获取用户
+func (dao *UserDAO) GetByUsername(username string) (*model.User, error) {
+	var user model.User
+	err := dao.db.Where("username = ?", username).First(&user).Error
+	if err != nil {
+		return nil, err
+	}
+	return &user, nil
+}
+
+// GetByEmail 根据邮箱获取用户
+func (dao *UserDAO) GetByEmail(email string) (*model.User, error) {
+	var user model.User
+	err := dao.db.Where("email = ?", email).First(&user).Error
+	if err != nil {
+		return nil, err
+	}
+	return &user, nil
+}
+
+// Update 更新用户
+func (dao *UserDAO) Update(user *model.User) error {
+	return dao.db.Save(user).Error
+}
+
+// Delete 删除用户
+func (dao *UserDAO) Delete(id uint) error {
+	return dao.db.Delete(&model.User{}, id).Error
+}
+
+// List 获取用户列表
+func (dao *UserDAO) List(offset, limit int) ([]*model.User, error) {
+	var users []*model.User
+	err := dao.db.Offset(offset).Limit(limit).Find(&users).Error
+	return users, err
+}
+